Creating a branch for the equinox work.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@694816 13f79535-47bb-0310-9956-ffa450edef68

69 files changed, 5300 insertions, 0 deletions

diff --git a/branches/sca-equinox/modules/core-spi/LICENSE b/branches/sca-equinox/modules/core-spi/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/LICENSE
@@ -0,0 +1,205 @@
+
+                                 Apache License
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+   4. Redistribution. You may reproduce and distribute copies of the
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+      (a) You must give any other recipients of the Work or
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+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
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+      (c) You must retain, in the Source form of any Derivative Works
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+      You may add Your own copyright statement to Your modifications and
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+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
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diff --git a/branches/sca-equinox/modules/core-spi/NOTICE b/branches/sca-equinox/modules/core-spi/NOTICE
new file mode 100644
index 0000000000..fdfa0e9faa
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}
+Copyright (c) 2005 - 2008 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/branches/sca-equinox/modules/core-spi/pom.xml b/branches/sca-equinox/modules/core-spi/pom.xml
new file mode 100644
index 0000000000..6246686d08
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/pom.xml
@@ -0,0 +1,116 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+-->
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.tuscany.sca</groupId>
+        <artifactId>tuscany-modules</artifactId>
+        <version>1.4-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>tuscany-core-spi</artifactId>
+    <name>Apache Tuscany SCA Core SPI</name>
+
+    <dependencies>
+    	<dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-extensibility</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>
+    
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-sca-api</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-assembly</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-definitions</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-policy</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-interface</artifactId>
+            <version>1.4-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-contribution</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>                        
+
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>2.5</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.codehaus.woodstox</groupId>
+            <artifactId>wstx-asl</artifactId>
+            <version>3.2.1</version>
+            <scope>runtime</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>stax</groupId>
+                    <artifactId>stax-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+    </dependencies>
+
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-bundle-plugin</artifactId>
+
+                <configuration>
+                    <instructions>
+                        <Bundle-Version>${tuscany.version}</Bundle-Version>
+                        <Bundle-SymbolicName>org.apache.tuscany.sca.core.spi</Bundle-SymbolicName>
+                        <Bundle-Description>${pom.name}</Bundle-Description>
+                        <Export-Package>org.apache.tuscany.sca*</Export-Package>
+                    </instructions>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/branches/sca-equinox/modules/core-spi/src/doc/Context Model.emx b/branches/sca-equinox/modules/core-spi/src/doc/Context Model.emx
new file mode 100644
index 0000000000..0445ea5a6b
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/doc/Context Model.emx
@@ -0,0 +1,673 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<!--

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ *

+ *   http://www.apache.org/licenses/LICENSE-2.0

+ *

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.

+-->

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diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ComponentContextFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ComponentContextFactory.java
new file mode 100644
index 0000000000..ed4b57639c
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ComponentContextFactory.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.context;
+
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.osoa.sca.ComponentContext;
+
+/**
+ * Interface implemented by the provider of the ComponentContext.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ComponentContextFactory {
+    /**
+     * Create an instance of ComponentContext
+     * 
+     * @param component The runtime component
+     * @param requestContextFactory The factory to create RequestContext
+     * @return An instance of ComponentContext for the component
+     */
+    ComponentContext createComponentContext(RuntimeComponent component, RequestContextFactory requestContextFactory);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ContextFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ContextFactoryExtensionPoint.java
new file mode 100644
index 0000000000..e92a8f2844
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/ContextFactoryExtensionPoint.java
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.context;
+
+/**
+ * An extension point for context factories. 
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ContextFactoryExtensionPoint {
+    
+    /**
+     * Add a context factory extension.
+     * 
+     * @param factory The factory to add
+     */
+    void addFactory(Object factory);
+    
+    /**
+     * Remove a context factory extension.
+     *  
+     * @param factory The factory to remove
+     */
+    void removeFactory(Object factory); 
+    
+    /**
+     * Get a factory implementing the given interface.
+     * @param factoryInterface the lookup key (factory interface)
+     * @return The factory
+     */
+    <T> T getFactory(Class<T> factoryInterface);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPoint.java
new file mode 100644
index 0000000000..5a0aefe55d
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPoint.java
@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.context;
+
+import java.lang.reflect.Constructor;
+import java.util.HashMap;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Default implementation of a model factory extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultContextFactoryExtensionPoint implements ContextFactoryExtensionPoint {
+
+    /**
+     * The Map of Factories that have been registered.
+     */
+    private HashMap<Class<?>, Object> factories = new HashMap<Class<?>, Object>();
+
+    private ExtensionPointRegistry registry;
+
+    public DefaultContextFactoryExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    /**
+     * Add a model factory extension.
+     *
+     * @param factory The factory to add.
+     * @throws IllegalArgumentException if factory is null
+     */
+    public void addFactory(Object factory) throws IllegalArgumentException {
+        if (factory == null) {
+            throw new IllegalArgumentException("Cannot add null as a factory");
+        }
+
+        Class<?>[] interfaces = factory.getClass().getInterfaces();
+        for (int i = 0; i<interfaces.length; i++) {
+            factories.put(interfaces[i], factory);
+        }
+    }
+
+    /**
+     * Remove a model factory extension.
+     *
+     * @param factory The factory to remove
+     * @throws IllegalArgumentException if factory is null
+     */
+    public void removeFactory(Object factory) throws IllegalArgumentException {
+        if (factory == null) {
+            throw new IllegalArgumentException("Cannot remove null as a factory");
+        }
+
+        Class<?>[] interfaces = factory.getClass().getInterfaces();
+        for (int i = 0; i<interfaces.length; i++) {
+            factories.remove(interfaces[i]);
+        }
+    }
+
+    /**
+     * Get a factory implementing the given interface.
+     *
+     * @param factoryInterface The lookup key (factory interface)
+     * @return The factory
+     */
+    public <T> T getFactory(Class<T> factoryInterface) throws IllegalArgumentException {
+        if (factoryInterface == null) {
+            throw new IllegalArgumentException("Cannot get null as a factory");
+        }
+
+        Object factory = factories.get(factoryInterface);
+        if (factory == null) {
+
+            // Dynamically load a factory class declared under META-INF/services
+            try {
+                Class<?> factoryClass = ServiceDiscovery.getInstance().loadFirstServiceClass(factoryInterface);
+                if (factoryClass != null) {
+            
+                    // Default empty constructor
+                    Constructor<?> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+            
+                    // Cache the loaded factory
+                    addFactory(factory);
+                }
+            } catch (Exception e) {
+                throw new IllegalArgumentException(e);
+            }
+
+        }
+
+        return factoryInterface.cast(factory);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/PropertyValueFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/PropertyValueFactory.java
new file mode 100644
index 0000000000..9766e164b8
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/PropertyValueFactory.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.context;
+
+import org.apache.tuscany.sca.assembly.ComponentProperty;
+
+/**
+ * Interface implemented by the provider of the property values
+ *
+ * @version $Rev$ $Date$
+ */
+public interface PropertyValueFactory {
+
+    /**
+     * This method will create an instance of the value for the specified Property.
+     * 
+     * @param property The Property from which to retrieve the property value
+     * @param type The type of the property value being retrieved from the Property
+     * @param <B> Type type of the property value being looked up
+     * 
+     * @return the value for the Property
+     */
+    <B> B createPropertyValue(ComponentProperty property, Class<B> type);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/RequestContextFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/RequestContextFactory.java
new file mode 100644
index 0000000000..546757c766
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/context/RequestContextFactory.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.context;
+
+import org.osoa.sca.RequestContext;
+
+/**
+ * Interface implemented by the provider of the RequestContext.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface RequestContextFactory {
+    /**
+     * @return An instance of RequestContext for the current invocation
+     */
+    RequestContext createRequestContext();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/DefaultEndpointResolverFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/DefaultEndpointResolverFactoryExtensionPoint.java
new file mode 100644
index 0000000000..2849c27c1a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/DefaultEndpointResolverFactoryExtensionPoint.java
@@ -0,0 +1,180 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.endpointresolver;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Default implementation of a provider factory extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultEndpointResolverFactoryExtensionPoint implements EndpointResolverFactoryExtensionPoint {
+
+    private ExtensionPointRegistry registry;
+    private final Map<Class<?>, EndpointResolverFactory> endpointResolverFactories = new HashMap<Class<?>, EndpointResolverFactory>();
+    private boolean loaded;
+
+    /**
+     * The default constructor. Does nothing.
+     *
+     */
+    public DefaultEndpointResolverFactoryExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    /**
+     * Add an endpoint resolver factory.
+     * 
+     * @param endpointResolverFactory The resolver factory
+     */
+    public void addEndpointResolverFactory(EndpointResolverFactory endpointResolverFactory){
+        endpointResolverFactories.put(endpointResolverFactory.getModelType(), endpointResolverFactory);
+    }
+
+    /**
+     * Remove a endpoint resolver factory.
+     * 
+     * @param endpointResolverFactory The endpoint resolver factory
+     */
+    public void removeEndpointResolverFactory(EndpointResolverFactory endpointResolverFactory){
+        endpointResolverFactories.remove(endpointResolverFactory.getModelType());
+    }
+
+    /**
+     * Returns the provider factory associated with the given model type.
+     * @param modelType A model type
+     * @return The provider factory associated with the given model type
+     */
+    public EndpointResolverFactory getEndpointResolverFactory(Class<?> modelType) {
+        loadProviderFactories();
+
+        Class<?>[] classes = modelType.getInterfaces();
+        for (Class<?> c : classes) {
+            EndpointResolverFactory factory = endpointResolverFactories.get(c);
+            if (factory != null) {
+                return factory;
+            }
+        }
+        return endpointResolverFactories.get(modelType);
+    }
+
+
+    /**
+     * Load provider factories declared under META-INF/services.
+     * @param registry
+     */
+    private void loadProviderFactories() {
+        if (loaded)
+            return;
+
+        // Get the provider factory service declarations
+        Set<ServiceDeclaration> factoryDeclarations;
+        ServiceDiscovery serviceDiscovery = ServiceDiscovery.getInstance();
+        try {
+            factoryDeclarations = serviceDiscovery.getServiceDeclarations(EndpointResolverFactory.class);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        // Get the extension point
+        EndpointResolverFactoryExtensionPoint factoryExtensionPoint =
+            registry.getExtensionPoint(EndpointResolverFactoryExtensionPoint.class);
+        List<EndpointResolverFactory> factories = new ArrayList<EndpointResolverFactory>();
+
+        for (ServiceDeclaration factoryDeclaration : factoryDeclarations) {
+            Map<String, String> attributes = factoryDeclaration.getAttributes();
+
+            // Find the model type that identifies this resolver
+            String modelTypeName = attributes.get("model");
+
+            // Create a provider factory wrapper and register it
+            EndpointResolverFactory factory =
+                new LazyEndpointResolverFactory(registry, modelTypeName, factoryDeclaration);
+            factoryExtensionPoint.addEndpointResolverFactory(factory);
+            factories.add(factory);
+        }
+
+        loaded = true;
+    }
+
+    /**
+     * A wrapper around an endpoint provider factory allowing lazy
+     * loading and initialization of endpoint providers.
+     */
+    private class LazyEndpointResolverFactory implements EndpointResolverFactory {
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private ServiceDeclaration providerClass;
+        private EndpointResolverFactory factory;
+        private Class modelType;
+
+        private LazyEndpointResolverFactory(ExtensionPointRegistry registry,
+                                            String modelTypeName,
+                                            ServiceDeclaration providerClass) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.providerClass = providerClass;
+        }
+
+        @SuppressWarnings("unchecked")
+        private EndpointResolverFactory getFactory() {
+            if (factory == null) {
+                try {
+                    Class<EndpointResolverFactory> factoryClass = (Class<EndpointResolverFactory>)providerClass.loadClass();
+                    Constructor<EndpointResolverFactory> constructor =
+                        factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        public EndpointResolver createEndpointResolver(Endpoint endpoint, Binding binding) {
+            return getFactory().createEndpointResolver(endpoint, binding);
+        }
+
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+                    modelType = providerClass.loadClass(modelTypeName);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }    
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolver.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolver.java
new file mode 100644
index 0000000000..79a10f6d84
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolver.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.endpointresolver;
+
+
+/**
+ * A reference binding implementation can options implement this
+ * interface to tie into the Tuscany SCA runtime
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface EndpointResolver {
+
+    /**
+     * This method will be invoked when the endpoint is
+     * activated. It gives the resolver the opportunity
+     * to do any set up ready for when it is asked to 
+     * resolve the endpoint when a message arrives
+     */
+    void start();
+    
+    /**
+     * This method will be invoked when the endpoint is
+     * to be resolved. The resolver will attempt to resolve the 
+     * endpoint against available services. The resolvers extending
+     * this interface will provide environment or binding specific 
+     * resolution processing
+     */
+    void resolve();
+
+    /**
+     * This method will be invoked when the endpont is
+     * deactivated. It gives the resolver the opportunity
+     * to take and required resolver shutdown actions
+     */
+    void stop();    
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactory.java
new file mode 100644
index 0000000000..fdd304a9c7
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactory.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.endpointresolver;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Endpoint;
+
+/**
+ * A factory for creating the runtime artifacts that resolve endpoints.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface EndpointResolverFactory <M>{
+
+    /**
+     * Creates a new endpoint resolver for the given component,
+     * reference and binding.
+     * 
+     * @param component The runtime component
+     * @param reference The reference on the runtime component
+     * @param enpoint The endpoint assembly model object
+     * @return The endpoint provider
+     */
+    EndpointResolver createEndpointResolver(Endpoint endpoint, Binding binding);
+    
+    Class<M> getModelType();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactoryExtensionPoint.java
new file mode 100644
index 0000000000..be55981131
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/endpointresolver/EndpointResolverFactoryExtensionPoint.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.endpointresolver;
+
+import java.util.List;
+
+
+/**
+ * An extension point for resolver factories. Holds all of the resolver
+ * factories from loaded extension points. Allows a resolver factory
+ * to be located based on a given model type. Hence the runtime can 
+ * generate endpoint resolvers from the in memory assembly model. 
+ *
+ * @version $Rev$ $Date$
+ */
+public interface EndpointResolverFactoryExtensionPoint {
+
+
+    /**
+     * Add an endpoint resolver factory.
+     * 
+     * @param endpointResolverFactory The resolver factory
+     */
+    void addEndpointResolverFactory(EndpointResolverFactory endpointResolverFactory);
+
+    /**
+     * Remove a endpoint resolver factory.
+     * 
+     * @param endpointResolverFactory The endpoint resolver factory
+     */
+    void removeEndpointResolverFactory(EndpointResolverFactory endpointResolverFactory);
+
+    /**
+     * Returns the endpoint resolver factory associated with the given binding type.
+     * @param bindingType A binding type
+     * @return The endpoint resolver factory associated with the given binding type
+     */
+    EndpointResolverFactory getEndpointResolverFactory(Class<?> bindingType);
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/Event.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/Event.java
new file mode 100644
index 0000000000..992c1188f7
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/Event.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.event;
+
+/**
+ * The base interface for events that are propagated in the runtime
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Event {
+
+    /**
+     * Returns the source of the event
+     */
+    Object getSource();
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventFilter.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventFilter.java
new file mode 100644
index 0000000000..d17aebd7e8
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventFilter.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.event;
+
+/**
+ * Evaluates whether a {@link RuntimeEventListener} is applicable to a given runtime event
+ *
+ * @version $Rev$ $Date$
+ */
+public interface EventFilter {
+
+    /**
+     * Performs the actual evaluation on an event
+     * @param event Returns true if the event matches implemented criteria
+     * @return Match result
+     */
+    boolean match(Event event);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventPublisher.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventPublisher.java
new file mode 100644
index 0000000000..f209eb8936
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/EventPublisher.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.event;
+
+/**
+ * Publishes events in the runtime by accepting {@link Event} objects and 
+ * forwarding them to all registered {@link RuntimeEventListener} objects.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface EventPublisher {
+
+    /**
+     * Publish an event to all registered listeners
+     * @param object The event to publish
+     */
+    void publish(Event object);
+
+    /**
+     * Registers a listener to receive notifications for the context
+     * @param listener The listener to add
+     */
+    void addListener(RuntimeEventListener listener);
+
+    /**
+     * Registers a listener to receive notifications for the context
+     * @param filter The filter that will be applied before the lister is called
+     * @param listener The lister to add
+     */
+    void addListener(EventFilter filter, RuntimeEventListener listener);
+
+
+    /**
+     * Removes a previously registered listener
+     * @param listener The listener to remove
+     */
+    void removeListener(RuntimeEventListener listener);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/RuntimeEventListener.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/RuntimeEventListener.java
new file mode 100644
index 0000000000..b34dceee62
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/RuntimeEventListener.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.event;
+
+import java.util.EventListener;
+
+/**
+ * Listeners observe events fired in the SCA runtime.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeEventListener extends EventListener {
+
+    /**
+     * Accepts and event and acts on it
+     * @param event The event to act on
+     */
+    void onEvent(Event event);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/TrueFilter.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/TrueFilter.java
new file mode 100644
index 0000000000..f888908340
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/event/TrueFilter.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.event;
+
+/**
+ * An event filter that always returns a true condition
+ *
+ * @version $Rev$ $Date$
+ */
+public class TrueFilter implements EventFilter {
+
+    /**
+     * Performs the actual evaluation on an event. Always returns true
+     * in this case
+     * @param event The incoming event which is ignored
+     * @return true
+     */
+    public boolean match(Event event) {
+        return true;
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/DataExchangeSemantics.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/DataExchangeSemantics.java
new file mode 100644
index 0000000000..957a15ce8a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/DataExchangeSemantics.java
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.invocation;
+
+/**
+ * An invoker or interceptor can optionally implement this interface to indicate if they can 
+ * enforce the pass-by-value semantics for an operation on remotable interfaces.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface DataExchangeSemantics {
+    /**
+     * Indicate if the data can be passed in by reference as they won't be mutated.
+     * @return true if pass-by-reference is allowed
+     */
+    boolean allowsPassByReference();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Interceptor.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Interceptor.java
new file mode 100644
index 0000000000..a5f221fc11
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Interceptor.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.invocation;
+
+/**
+ * Synchronous mediation associated with a client- or target- side wire.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Interceptor extends Invoker {
+
+    /**
+     * Sets the next invoker
+     * @param next The next invoker
+     */
+    void setNext(Invoker next);
+
+    /**
+     * Returns the next invoker or null
+     * @return The next Invoker
+     */
+    Invoker getNext();
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InvocationChain.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InvocationChain.java
new file mode 100644
index 0000000000..75719bb0cc
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InvocationChain.java
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.invocation;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+
+/**
+ * A wire consists of 1..n invocation chains associated with the operations of its source service contract.
+ * <p/>
+ * Invocation chains may contain <code>Interceptors</code> that process invocations.
+ * <p/>
+ * A <code>Message</code> is used to pass data associated with an invocation through the chain.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface InvocationChain {
+    /**
+     * Returns the target operation for this invocation chain.
+     *
+     * @return The target operation for this invocation chain
+     */
+    Operation getTargetOperation();
+
+    /**
+     * Updates the target operation for this invocation chain.
+     *
+     * @param operation The new target operation for this invocation chain
+     */
+    void setTargetOperation(Operation operation);
+    
+    /**
+     * Returns the source operation for this invocation chain.
+     *
+     * @return The source operation for this invocation chain
+     */    
+    Operation getSourceOperation();
+
+    /**
+     * Adds an interceptor to the chain. For reference side, it will be added to
+     * Phase.REFERENCE. For service side, it will be added to Phase.SERVICE 
+     *
+     * @param interceptor The interceptor to add
+     */
+    void addInterceptor(Interceptor interceptor);
+
+    /**
+     * Adds an invoker to the chain
+     *
+     * @param invoker The invoker to add
+     */
+    void addInvoker(Invoker invoker);
+
+    /**
+     * Returns the first invoker in the chain.
+     *
+     * @return The first invoker in the chain
+     */
+    Invoker getHeadInvoker();
+
+    /**
+     * @deprecated This method is not used
+     * Returns the last invoker in the chain.
+     *
+     * @return The last invoker in the chain
+     */
+    @Deprecated
+    Invoker getTailInvoker();
+
+    /**
+     * @deprecated Please use <code>void addInterceptor(String phase, Interceptor interceptor);</code>
+     * Adds an interceptor at the given position in the interceptor stack
+     *
+     * @param index       The position in the interceptor stack to add the interceptor
+     * @param interceptor The interceptor to add
+     */
+    @Deprecated
+    void addInterceptor(int index, Interceptor interceptor);
+    
+    /**
+     * Add an interceptor to the given phase
+     * @param phase
+     * @param interceptor
+     */
+    void addInterceptor(String phase, Interceptor interceptor);
+    
+    /**
+     * Indicate if the data can be passed in by reference as they won't be mutated.
+     * @return true if pass-by-reference is allowed
+     */
+    boolean allowsPassByReference();
+    /**
+     * Force the invocation to allow pass-by-reference
+     * @param allowsPBR
+     */
+    void setAllowsPassByReference(boolean allowsPBR);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Invoker.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Invoker.java
new file mode 100644
index 0000000000..2748bbed9a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Invoker.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.invocation;
+
+/**
+ * Synchronous mediation associated with a client- or target- side wire.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Invoker {
+
+    /**
+     * Process a synchronous wire
+     *
+     * @param msg The request Message for the wire
+     * @return The response Message from the wire
+     */
+    Message invoke(Message msg);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Message.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Message.java
new file mode 100644
index 0000000000..a727693132
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Message.java
@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.invocation;
+
+import java.util.Map;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.runtime.EndpointReference;
+
+/**
+ * Represents a request, response, or exception flowing through a wire
+ *
+ * @version $Rev $Date$
+ */
+public interface Message {
+    String QOS_CTX_SECURITY_PRINCIPAL = "PRINCIPAL";
+
+    /**
+     * Returns the body of the message, which will be the payload or parameters associated with the wire
+     * @return The body of the message
+     */
+    <T> T getBody();
+
+    /**
+     * Sets the body of the message.
+     * @param body The body of the message
+     */
+    <T> void setBody(T body);
+
+    /**
+     * Get the end point reference of the source reference
+     * @return The end point reference of the reference originating the message
+     */
+    EndpointReference getFrom();
+
+    /**
+     * Set the end point reference of the reference originating the message
+     * @param from The end point reference of the reference originating the message
+     */
+    void setFrom(EndpointReference from);
+
+    /**
+     * Get the end point reference of target service
+     * @return The end point reference of the service that the message targets
+     */
+    EndpointReference getTo();
+
+    /**
+     * Set the end point reference of target service
+     * @param to The end point reference of the service that the message targets
+     */
+    void setTo(EndpointReference to);
+    
+    /**
+     * Returns the id of the message
+     * @return The message Id
+     */
+    Object getMessageID();
+
+    /**
+     * Sets the id of the message
+     * @param messageId The message ID
+     */
+    void setMessageID(Object messageId);
+
+    /**
+     * Determines if the message represents a fault/exception
+     *
+     * @return true If the message body is a fault object, false if the body is a normal payload
+     */
+    boolean isFault();
+
+    /**
+     * Set the message body with a fault object. After this method is called, isFault() returns true.
+     *
+     * @param fault The fault object represents an exception
+     */
+    <T> void setFaultBody(T fault);
+
+    /**
+     * Returns the operation that created the message.
+     *
+     * @return The operation that created the message
+     */
+    Operation getOperation();
+
+    /**
+     * Sets the operation that created the message.
+     *
+     * @param op The operation that created the message
+     */
+    void setOperation(Operation op);
+    
+    /** 
+     * Returns a map of objects that represents the QoS context that wraps this message such as 
+     * invoking authenticated principal and so on.
+     * 
+     * @return
+     */
+    Map<String, Object> getQoSContext();
+    
+    /** 
+     * Returns a map of objects that are contained in the message header
+     * 
+     * @return
+     */
+    Map<String, Object> getHeader();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/MessageFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/MessageFactory.java
new file mode 100644
index 0000000000..38c900e36a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/MessageFactory.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.invocation;
+
+
+/**
+ * A factory for messages
+ *
+ * @version $Rev $Date$
+ */
+public interface MessageFactory {
+
+    /**
+     * Creates a new message.
+     * 
+     * @return The new message
+     */
+    Message createMessage();
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Phase.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Phase.java
new file mode 100644
index 0000000000..2deb273f84
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/Phase.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.invocation;
+
+/**
+ * Tuscany built-in phases for the invocation chain
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface Phase {
+    // The first phase for outgoing invocations via a reference
+    String REFERENCE = "component.reference";
+
+    // data transformation and validation
+    String REFERENCE_INTERFACE = "reference.interface";
+
+    // reference policy handling
+    String REFERENCE_POLICY = "reference.policy";
+
+    // reference binding invoker
+    String REFERENCE_BINDING = "reference.binding";
+
+    // The first phase for incoming invocations via a service
+    String SERVICE_BINDING = "service.binding";
+
+    // service policy handling
+    String SERVICE_POLICY = "service.policy";
+
+    // data validation and transformation
+    String SERVICE_INTERFACE = "service.interface";
+
+    // TODO: not sure if we need to have this face
+    String SERVICE = "component.service";
+
+    // implementation policy handling
+    String IMPLEMENTATION_POLICY = "implementation.policy";
+
+    // implementation invoker
+    String IMPLEMENTATION = "component.implementation";
+
+    // String getName();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/management/ManagementService.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/management/ManagementService.java
new file mode 100644
index 0000000000..3887db4873
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/management/ManagementService.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.management;
+
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * Interface for the management service abstraction. The implementation
+ * could be based on a variety of technologies including JMX, WSDM,
+ * SNMP etc.
+ *
+ * @version $Revision$ $Date$
+ */
+public interface ManagementService {
+
+    /**
+     * Registers a component for management.
+     *
+     * @param name      Name of the component.
+     * @param component Component to be registered.
+     */
+    void registerComponent(String name, RuntimeComponent component);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BindingProviderFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BindingProviderFactory.java
new file mode 100644
index 0000000000..0f6a932c51
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BindingProviderFactory.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * A factory for creating the runtime artifacts that represent bindings.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface BindingProviderFactory<M extends Binding> extends ProviderFactory<M> {
+
+    /**
+     * Creates a new reference binding provider for the given component and
+     * reference.
+     * 
+     * @param component The runtime component
+     * @param reference The reference on the runtime component
+     * @param binding The binding assembly model object
+     * @return The binding provider
+     */
+    ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component,
+                                                            RuntimeComponentReference reference,
+                                                            M binding);
+
+    /**
+     * Creates a new service binding provider for the given component and
+     * service.
+     * 
+     * @param component The runtime component
+     * @param service The service on the runtime component
+     * @param binding The binding assembly model object
+     * @return The binding provider
+     */
+    ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component,
+                                                        RuntimeComponentService service,
+                                                        M binding);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultProviderFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultProviderFactoryExtensionPoint.java
new file mode 100644
index 0000000000..dfc3ddb468
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultProviderFactoryExtensionPoint.java
@@ -0,0 +1,362 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * Default implementation of a provider factory extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultProviderFactoryExtensionPoint implements ProviderFactoryExtensionPoint {
+
+    private ExtensionPointRegistry registry;
+    private final Map<Class<?>, ProviderFactory> providerFactories = new HashMap<Class<?>, ProviderFactory>();
+    private final List<PolicyProviderFactory> policyProviderFactories = new ArrayList<PolicyProviderFactory>();
+    private boolean loaded;
+
+    /**
+     * The default constructor. Does nothing.
+     *
+     */
+    public DefaultProviderFactoryExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    /**
+     * Add a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    public void addProviderFactory(ProviderFactory providerFactory) {
+        if(providerFactory instanceof PolicyProviderFactory) {
+            policyProviderFactories.add((PolicyProviderFactory)providerFactory);
+        } 
+        providerFactories.put(providerFactory.getModelType(), providerFactory);
+    }
+
+    /**
+     * Remove a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    public void removeProviderFactory(ProviderFactory providerFactory) {
+        if(providerFactory instanceof PolicyProviderFactory) {
+            policyProviderFactories.remove((PolicyProviderFactory)providerFactory);
+        }
+        providerFactories.remove(providerFactory.getModelType());
+    }
+
+    /**
+     * Returns the provider factory associated with the given model type.
+     * @param modelType A model type
+     * @return The provider factory associated with the given model type
+     */
+    public ProviderFactory getProviderFactory(Class<?> modelType) {
+        loadProviderFactories();
+
+        Class<?>[] classes = modelType.getInterfaces();
+        for (Class<?> c : classes) {
+            ProviderFactory factory = providerFactories.get(c);
+            if (factory != null) {
+                return factory;
+            }
+        }
+        return providerFactories.get(modelType);
+    }
+
+    public List<PolicyProviderFactory> getPolicyProviderFactories() {
+        loadProviderFactories();
+        return policyProviderFactories;
+    }
+
+    /**
+     * Load provider factories declared under META-INF/services.
+     * @param registry
+     */
+    private void loadProviderFactories() {
+        if (loaded)
+            return;
+
+        loadProviderFactories(BindingProviderFactory.class);
+        loadProviderFactories(ImplementationProviderFactory.class);
+        loadProviderFactories(PolicyProviderFactory.class);
+
+        loaded = true;
+    }
+
+    /**
+     * Load provider factories declared under META-INF/services.
+     * @param registry
+     * @param factoryClass
+     * @return
+     */
+    private List<ProviderFactory> loadProviderFactories(Class<?> factoryClass) {
+
+        // Get the provider factory service declarations
+        Set<ServiceDeclaration> factoryDeclarations;
+        ServiceDiscovery serviceDiscovery = ServiceDiscovery.getInstance();
+        try {
+            factoryDeclarations = serviceDiscovery.getServiceDeclarations(factoryClass);
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+
+        // Get the target extension point
+        ProviderFactoryExtensionPoint factoryExtensionPoint =
+            registry.getExtensionPoint(ProviderFactoryExtensionPoint.class);
+        List<ProviderFactory> factories = new ArrayList<ProviderFactory>();
+
+        for (ServiceDeclaration factoryDeclaration : factoryDeclarations) {
+            Map<String, String> attributes = factoryDeclaration.getAttributes();
+
+            // Load an implementation provider factory
+            if (factoryClass == ImplementationProviderFactory.class) {
+                String modelTypeName = attributes.get("model");
+
+                // Create a provider factory wrapper and register it
+                ImplementationProviderFactory factory =
+                    new LazyImplementationProviderFactory(registry, modelTypeName, factoryDeclaration);
+                factoryExtensionPoint.addProviderFactory(factory);
+                factories.add(factory);
+
+            } else if (factoryClass == BindingProviderFactory.class) {
+
+                // Load a binding provider factory
+                String modelTypeName = attributes.get("model");
+
+                // Create a provider factory wrapper and register it
+                BindingProviderFactory factory =
+                    new LazyBindingProviderFactory(registry, modelTypeName, factoryDeclaration);
+                factoryExtensionPoint.addProviderFactory(factory);
+                factories.add(factory);
+            } else if (factoryClass == PolicyProviderFactory.class) {
+                // Load a policy provider factory
+                String modelTypeName = attributes.get("model");
+
+                // Create a provider factory wrapper and register it
+                PolicyProviderFactory factory =
+                    new LazyPolicyProviderFactory(registry, modelTypeName, factoryDeclaration);
+                factoryExtensionPoint.addProviderFactory(factory);
+                factories.add(factory);
+            }
+        }
+        return factories;
+    }
+
+    /**
+     * A wrapper around an implementation provider factory allowing lazy
+     * loading and initialization of implementation providers.
+     */
+    private static class LazyBindingProviderFactory implements BindingProviderFactory {
+
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private ServiceDeclaration factoryDeclaration;
+        private BindingProviderFactory factory;
+        private Class modelType;
+
+        private LazyBindingProviderFactory(ExtensionPointRegistry registry,
+                                           String modelTypeName,
+                                           ServiceDeclaration factoryDeclaration) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.factoryDeclaration = factoryDeclaration;
+        }
+
+        @SuppressWarnings("unchecked")
+        private BindingProviderFactory getFactory() {
+            if (factory == null) {
+                try {
+                    Class<BindingProviderFactory> factoryClass =
+                        (Class<BindingProviderFactory>)factoryDeclaration.loadClass();
+                    Constructor<BindingProviderFactory> constructor =
+                        factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        @SuppressWarnings("unchecked")
+        public ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component,
+                                                                       RuntimeComponentReference reference,
+                                                                       Binding binding) {
+            return getFactory().createReferenceBindingProvider(component, reference, binding);
+        }
+
+        @SuppressWarnings("unchecked")
+        public ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component,
+                                                                   RuntimeComponentService service,
+                                                                   Binding binding) {
+            return getFactory().createServiceBindingProvider(component, service, binding);
+        }
+
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+                    modelType = factoryDeclaration.loadClass(modelTypeName);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }
+
+    /**
+     * A wrapper around an implementation provider factory allowing lazy
+     * loading and initialization of implementation providers.
+     */
+    private class LazyImplementationProviderFactory implements ImplementationProviderFactory {
+
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private ServiceDeclaration providerClass;
+        private ImplementationProviderFactory factory;
+        private Class modelType;
+
+        private LazyImplementationProviderFactory(ExtensionPointRegistry registry,
+                                                  String modelTypeName,
+                                                  ServiceDeclaration providerClass) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.providerClass = providerClass;
+        }
+
+        @SuppressWarnings("unchecked")
+        private ImplementationProviderFactory getFactory() {
+            if (factory == null) {
+                try {
+                    Class<ImplementationProviderFactory> factoryClass =
+                        (Class<ImplementationProviderFactory>)providerClass.loadClass();
+                    Constructor<ImplementationProviderFactory> constructor =
+                        factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        @SuppressWarnings("unchecked")
+        public ImplementationProvider createImplementationProvider(RuntimeComponent component,
+                                                                   Implementation Implementation) {
+            return getFactory().createImplementationProvider(component, Implementation);
+        }
+
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+
+                    modelType = providerClass.loadClass(modelTypeName);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }
+
+    /**
+     * A wrapper around an policy provider factory allowing lazy
+     * loading and initialization of policy providers.
+     */
+    private class LazyPolicyProviderFactory implements PolicyProviderFactory {
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private ServiceDeclaration providerClass;
+        private PolicyProviderFactory factory;
+        private Class modelType;
+
+        private LazyPolicyProviderFactory(ExtensionPointRegistry registry,
+                                          String modelTypeName,
+                                          ServiceDeclaration providerClass) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.providerClass = providerClass;
+        }
+
+        @SuppressWarnings("unchecked")
+        private PolicyProviderFactory getFactory() {
+            if (factory == null) {
+                try {
+                    Class<PolicyProviderFactory> factoryClass = (Class<PolicyProviderFactory>)providerClass.loadClass();
+                    Constructor<PolicyProviderFactory> constructor =
+                        factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        public PolicyProvider createImplementationPolicyProvider(RuntimeComponent component,
+                                                                 Implementation implementation) {
+            return getFactory().createImplementationPolicyProvider(component, implementation);
+        }
+
+        public PolicyProvider createReferencePolicyProvider(RuntimeComponent component,
+                                                            RuntimeComponentReference reference,
+                                                            Binding binding) {
+            return getFactory().createReferencePolicyProvider(component, reference, binding);
+        }
+
+        public PolicyProvider createServicePolicyProvider(RuntimeComponent component,
+                                                          RuntimeComponentService service,
+                                                          Binding binding) {
+            return getFactory().createServicePolicyProvider(component, service, binding);
+        }
+
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+                    modelType = providerClass.loadClass(modelTypeName);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultSCADefinitionsProviderExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultSCADefinitionsProviderExtensionPoint.java
new file mode 100644
index 0000000000..068d0d12d7
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultSCADefinitionsProviderExtensionPoint.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Concrete Implementation for the SCADefinitionsProviderExtensionPoint
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultSCADefinitionsProviderExtensionPoint implements
+    SCADefinitionsProviderExtensionPoint {
+
+    private ExtensionPointRegistry extensionPointRegistry = null;
+    
+    private List<SCADefinitionsProvider> scaDefnsProviders = new ArrayList<SCADefinitionsProvider>();
+    
+    public DefaultSCADefinitionsProviderExtensionPoint(ExtensionPointRegistry extnPtReg) {
+        this.extensionPointRegistry = extnPtReg;
+    }
+
+    public void addSCADefinitionsProvider(SCADefinitionsProvider provider) {
+        scaDefnsProviders.add(provider);
+    }
+
+    public void removeSCADefinitionsProvider(SCADefinitionsProvider provider) {
+        scaDefnsProviders.remove(provider);
+    }
+
+    public List<SCADefinitionsProvider> getSCADefinitionsProviders() {
+        if (scaDefnsProviders.isEmpty()) {
+            loadProviders();
+        }
+        return scaDefnsProviders;
+    }
+
+    private void loadProviders() {
+        // Get the provider service declarations
+        Set<ServiceDeclaration> defnProviderDecls;
+        SCADefinitionsProvider aProvider = null;
+        Class providerClass = null;
+        Constructor constructor = null;
+
+        try {
+            defnProviderDecls =
+                ServiceDiscovery.getInstance().getServiceDeclarations(SCADefinitionsProvider.class);
+    
+            for (ServiceDeclaration aDefnProviderDecl : defnProviderDecls) {
+                providerClass = aDefnProviderDecl.loadClass();
+            
+                try {
+                    constructor = providerClass.getConstructor();
+                    aProvider = (SCADefinitionsProvider)constructor.newInstance();
+                } catch (NoSuchMethodException e1) {
+                        constructor = providerClass.getConstructor(ExtensionPointRegistry.class);
+                        aProvider = (SCADefinitionsProvider)constructor.newInstance(extensionPointRegistry);
+                } 
+                
+                scaDefnsProviders.add(aProvider);
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProvider.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProvider.java
new file mode 100644
index 0000000000..015c673d66
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProvider.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * A component implementation can implement this interface in order to tie 
+ * into the Tuscany runtime 
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ImplementationProvider {
+
+    /**
+     * This method will be invoked when the component implementation
+     * is activated.
+     */
+    void start();
+
+    /**
+     * This method will be invoked when the component implementation
+     * is deactivated.
+     */
+    void stop();
+
+    /**
+     * Create an invoker for the component implementation in the invocation
+     * chain. The invoker will be responsible for calling the implementation
+     * logic for the given component.
+     * 
+     * @param service The component service
+     * @param operation The operation that the interceptor will handle
+     * @return An invoker that handles the invocation logic, null should be
+     *         returned if no invoker is required
+     */
+    Invoker createInvoker(RuntimeComponentService service, Operation operation);
+
+    /**
+     * For bindings that invoke one-way callback operations asynchronously,
+     * there is no need to perform a thread switch before calling the invoker.
+     * This method indicates whether the binding has this capability.
+     * 
+     * @return true if the callback invoker is able to invoke one-way operations
+     *         asynchronously, false if all invocations are synchronous
+     */
+    boolean supportsOneWayInvocation();
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProviderFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProviderFactory.java
new file mode 100644
index 0000000000..6a37d1e951
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ImplementationProviderFactory.java
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * An interface for factories that create implementation providers.  
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ImplementationProviderFactory<M extends Implementation> extends ProviderFactory<M> {
+    
+    /**
+     * Creates a new implementation provider for the given
+     * component.
+     * 
+     * @param component The runtime component
+     * @param Implementation The implementation type
+     * @return The implementation provider
+     */
+    ImplementationProvider createImplementationProvider(RuntimeComponent component, M Implementation);
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyImplementor.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyImplementor.java
new file mode 100644
index 0000000000..f2b59a7c54
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyImplementor.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+/**
+ * This interface can be optionally implemented by the Binding or Implementation providers to
+ * indicate if they implement the policies in the binding/implementation provider.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface PolicyImplementor {
+    /**
+     * Get a list of policy names that are implemented by this policy implementor
+     * @return A list of policy names
+     */
+    List<QName> getImplementedPolicies();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProvider.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProvider.java
new file mode 100644
index 0000000000..644283dea1
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProvider.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Interceptor;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public interface PolicyProvider {
+    /**
+     * Create an interceptor for a given operation
+     * @param operation
+     * @return An interceptor that realize the policySet
+     */
+    Interceptor createInterceptor(Operation operation);
+
+    /**
+     * Get the phase that the interceptor should be added
+     * @return The phase that this interceptor belongs to
+     */
+    String getPhase();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProviderFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProviderFactory.java
new file mode 100644
index 0000000000..b60a14d2da
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/PolicyProviderFactory.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.policy.Policy;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public interface PolicyProviderFactory<M extends Policy> extends ProviderFactory<M> {
+    /**
+     * Create policy provider for a given reference binding
+     * @param component
+     * @param reference
+     * @param binding
+     * @return
+     */
+    PolicyProvider createReferencePolicyProvider(RuntimeComponent component,
+                                                 RuntimeComponentReference reference,
+                                                 Binding binding);
+
+    /**
+     * Create policy provider for a given service binding
+     * @param component
+     * @param service
+     * @param binding
+     * @return
+     */
+    PolicyProvider createServicePolicyProvider(RuntimeComponent component,
+                                               RuntimeComponentService service,
+                                               Binding binding);
+
+    /**
+     * Create policy provider for a given component implementation
+     * @param component
+     * @param implementation
+     * @return
+     */
+    PolicyProvider createImplementationPolicyProvider(RuntimeComponent component, Implementation implementation);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactory.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactory.java
new file mode 100644
index 0000000000..2102806881
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactory.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+/**
+ * A factory for runtime providers.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ProviderFactory<M> {
+
+    /**
+     * The model type that this factory creates providers for.
+     * 
+     * @return the model type
+     */
+    Class<M> getModelType();
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactoryExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactoryExtensionPoint.java
new file mode 100644
index 0000000000..d8f9973338
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ProviderFactoryExtensionPoint.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import java.util.List;
+
+
+/**
+ * An extension point for provider factories. Holds all of the provider
+ * factories from loaded extension points. Allows a provider factory
+ * to be located based on a given model type. Hence the runtime can 
+ * generate runtime artifacts from the in memory assembly model. 
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ProviderFactoryExtensionPoint {
+
+
+    /**
+     * Add a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    void addProviderFactory(ProviderFactory providerFactory);
+
+    /**
+     * Remove a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    void removeProviderFactory(ProviderFactory providerFactory);
+
+    /**
+     * Returns the provider factory associated with the given model type.
+     * @param modelType A model type
+     * @return The provider factory associated with the given model type
+     */
+    ProviderFactory getProviderFactory(Class<?> modelType);
+    
+    /**
+     * Get a list of registered PolicyProviderFactory
+     * @return a list of registered PolicyProviderFactory
+     */
+    List<PolicyProviderFactory> getPolicyProviderFactories();
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ReferenceBindingProvider.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ReferenceBindingProvider.java
new file mode 100644
index 0000000000..b3ab1d8b87
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ReferenceBindingProvider.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+
+/**
+ * A reference binding implementation can options implement this
+ * interface to tie into the Tuscany SCA runtime
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ReferenceBindingProvider {
+
+    /**
+     * This method will be invoked when the component reference binding is
+     * activated.
+     */
+    void start();
+
+    /**
+     * This method will be invoked when the component reference binding is
+     * deactivated.
+     */
+    void stop();
+
+    /**
+     * Create an invoker for the reference binding in the invocation chain. The
+     * invoker is responsible for making the outbound invocation over the
+     * binding protocol.
+     * 
+     * @param operation The operation that the interceptor will handle
+     * @return An invoker that handles the invocation logic, null should be
+     *         returned if no invoker is required
+     */
+    Invoker createInvoker(Operation operation);
+
+    /**
+     * Get the effective interface contract imposed by the binding. For example,
+     * it will be interface contract introspected from the WSDL portType used by
+     * the endpoint for a WebService binding.
+     * 
+     * @return The effective interface contract, if null is returned, the
+     *         interface contract for the component reference will be used
+     */
+    InterfaceContract getBindingInterfaceContract();
+
+    /**
+     * For bindings that invoke one-way operations asynchronously, there is no
+     * need to perform a thread switch before calling the invoker. This method
+     * indicates whether the binding has this capability.
+     * 
+     * @return true if the binding invoker is able to invoke one-way operations
+     *         asynchronously, false if all invocations are synchronous
+     */
+    boolean supportsOneWayInvocation();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProvider.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProvider.java
new file mode 100644
index 0000000000..bd0f4d4b75
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProvider.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.definitions.SCADefinitions;
+
+/**
+ * Models a provider of SCA Definitions.  Typically SCA Definitions providers 
+ * may either load a definitions.xml file or create the SCA Definitions model
+ * programmatically.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCADefinitionsProvider {
+    SCADefinitions getSCADefinition() throws SCADefinitionsProviderException ;
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderException.java
new file mode 100644
index 0000000000..b05130d6c8
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderException.java
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class SCADefinitionsProviderException extends Exception {
+   
+    public SCADefinitionsProviderException(Throwable e) {
+        super(e);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderExtensionPoint.java
new file mode 100644
index 0000000000..a5d60cc6eb
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/SCADefinitionsProviderExtensionPoint.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import java.util.List;
+
+/**
+ * An extension point for SCA Definitions Providers.  SCA Definition providers, load SCA Definitions
+ * items that are being specifically contributed by the module that hosts the provider in question.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCADefinitionsProviderExtensionPoint {
+    
+    void addSCADefinitionsProvider(SCADefinitionsProvider provider);
+    void removeSCADefinitionsProvider(SCADefinitionsProvider provider);
+    List<SCADefinitionsProvider> getSCADefinitionsProviders();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ServiceBindingProvider.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ServiceBindingProvider.java
new file mode 100644
index 0000000000..e15234a549
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/ServiceBindingProvider.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.provider;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * A service binding can optionally implement this interface to tie
+ * into the Tuscany SCA runtime
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ServiceBindingProvider {
+    /**
+     * This method will be invoked when the component service binding is
+     * activated.
+     */
+    void start();
+
+    /**
+     * This method will be invoked when the component service binding is
+     * deactivated.
+     */
+    void stop();
+
+    /**
+     * Get the effective interface contract imposed by the binding. For example,
+     * it will be interface contract introspected from the WSDL portType used by
+     * the endpoint for a WebService binding.
+     * 
+     * @return The effective interface contract, if null is returned, the
+     *         interface contract for the component service will be used
+     */
+    InterfaceContract getBindingInterfaceContract();
+
+    /**
+     * For bindings that invoke one-way callback operations asynchronously,
+     * there is no need to perform a thread switch before calling the invoker.
+     * This method indicates whether the binding has this capability.
+     * 
+     * @return true if the callback invoker is able to invoke one-way operations
+     *         asynchronously, false if all invocations are synchronous
+     */
+    boolean supportsOneWayInvocation();
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java
new file mode 100644
index 0000000000..851afee3c1
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/DefaultWireProcessorExtensionPoint.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.runtime;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+/**
+ * The default implementation of a <code>WireProcessorExtensionPoint</code>
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultWireProcessorExtensionPoint implements RuntimeWireProcessorExtensionPoint {
+
+	/**
+	 * The list of WireProcessors available to the runtime
+	 */
+    private final List<RuntimeWireProcessor> processors = new ArrayList<RuntimeWireProcessor>();
+
+    /**
+    * Registers a wire-processor in the runtime
+    * 
+    * @param processor The processor to register
+    */
+    public void addWireProcessor(RuntimeWireProcessor processor) {
+        processors.add(processor);
+    }
+
+    /**
+     * De-registers a wire-processor in the runtime
+     * 
+     * @param processor The processor to de-register
+     */
+    public void removeWireProcessor(RuntimeWireProcessor processor) {
+        processors.remove(processor);
+    }
+    
+    /**
+     * Returns a list of registered wire-processors.
+     * 
+     * @return The list of wire processors
+     */    
+    public List<RuntimeWireProcessor> getWireProcessors() {
+        return processors;
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/EndpointReference.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/EndpointReference.java
new file mode 100644
index 0000000000..b6fafa5fb6
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/EndpointReference.java
@@ -0,0 +1,93 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Contract;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+
+/**
+ * The endpoint reference for a component service or reference
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface EndpointReference extends Cloneable {
+    /**
+     * Get the component for the endpoint
+     * @return The component, null of the EPR is for a non-SCA service
+     */
+    RuntimeComponent getComponent();
+
+    /**
+     * Get the component service or reference for the endpoint
+     * @return The component service or reference, null if the EPR is for a non-SCA service
+     */
+    Contract getContract();
+
+    /**
+     * Get the binding for the endpoint
+     * @return The binding
+     */
+    Binding getBinding();
+
+    /**
+     * Get the interface contract for the endpoint
+     * @return The interface contract
+     */
+    InterfaceContract getInterfaceContract();
+    
+    /**
+     * Update the interface contract for the endpoint
+     * @param interfaceContract The updated interface contract
+     */
+    void setInterfaceContract(InterfaceContract interfaceContract);
+
+    /**
+     * Get the URI for this endpoint
+     * @return The URI of the endpoint
+     */
+    String getURI();
+
+    /**
+     * Set the URI for this endpoint
+     * @param uri The new URI of the endpoint
+     */
+    void setURI(String uri);
+
+    /**
+     * Get the callback endpoint for this endpoint
+     * @return The callback endpoint for this endpoint
+     */
+    EndpointReference getCallbackEndpoint();
+
+    /**
+     * Set the callback endpoint for this endpoint
+     * @param callbackEndpoint The new callback endpoint for this endpoint
+     */
+    void setCallbackEndpoint(EndpointReference callbackEndpoint);
+
+    Object clone() throws CloneNotSupportedException;   
+    
+    void setReferenceParameters(ReferenceParameters parameters);
+    ReferenceParameters getReferenceParameters();
+
+    void mergeEndpoint(EndpointReference epr);
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/ReferenceParameters.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/ReferenceParameters.java
new file mode 100644
index 0000000000..0e19538aff
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/ReferenceParameters.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+/**
+ * Parameters for the EndPointReference
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface ReferenceParameters extends Cloneable {
+    /**
+     * Get the callback ID
+     * @return the callbackID
+     */
+    Object getCallbackID();
+
+    /**
+     * Set the callback ID
+     * @param callbackID the callbackID to set
+     */
+    void setCallbackID(Object callbackID);
+
+    /**
+     * Get the conversation ID
+     * @return the conversationID
+     */
+    Object getConversationID();
+
+    /**
+     * Set the conversation ID
+     * @param conversationID the conversationID to set
+     */
+    void setConversationID(Object conversationID);
+
+    /**
+     * Get the ID for the non-ServiceReference callback object
+     * @return
+     */
+    Object getCallbackObjectID();
+
+    /**
+     * Set the ID for the non-ServiceReference callback object
+     * @param callbackObjectID
+     */
+    void setCallbackObjectID(Object callbackObjectID);
+
+    EndpointReference getCallbackReference();
+
+    void setCallbackReference(EndpointReference callback);
+
+    Object clone() throws CloneNotSupportedException;
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponent.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponent.java
new file mode 100644
index 0000000000..30bba78a40
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponent.java
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.provider.PolicyProvider;
+
+/**
+ * The runtime component interface. Provides the bridge between the
+ * assembly model representation of a component and its runtime 
+ * realization.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeComponent extends Component {
+    /**
+     * Set the implementation-specific configuration for this component
+     * @param implementationProvider The object that manages the component implementation
+     */
+    void setImplementationProvider(ImplementationProvider implementationProvider);
+
+    /**
+     * Get the implementation-specific configuration for this component
+     * @return The implementation provider for this component
+     */
+    ImplementationProvider getImplementationProvider();
+
+    /**
+     * Get the associated component context
+     * @return
+     */
+    RuntimeComponentContext getComponentContext();
+
+    /**
+     * Set the associated component context
+     * @param context
+     */
+    void setComponentContext(RuntimeComponentContext context);
+
+    /**
+     * Tests if the RuntimeComponent is started
+     * @return true if the RuntimeComponent is started otherwise false
+     */
+    boolean isStarted();
+
+    /**
+     * Sets the RuntimeComponent started state
+     * @param started the state to set
+     */
+    void setStarted(boolean started);
+    
+    /**
+     * Add a policy provider to the component
+     * @param policyProvider
+     */
+    void addPolicyProvider(PolicyProvider policyProvider);
+    
+    /**
+     * Get a list of policy providers configured for this component
+     * @return
+     */
+    List<PolicyProvider> getPolicyProviders();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentContext.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentContext.java
new file mode 100644
index 0000000000..801bb9e294
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentContext.java
@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.osoa.sca.CallableReference;
+import org.osoa.sca.ComponentContext;
+import org.osoa.sca.ServiceReference;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeComponentContext extends ComponentContext {
+    /**
+     * Activate the reference (creating runtime wires)
+     * @param reference
+     */
+    void start(RuntimeComponentReference reference);
+
+    /**
+     * Deserialize the component reference
+     * @param reader
+     * @return A component that contains the reference
+     * @throws IOException
+     */
+    RuntimeComponent read(Reader reader) throws IOException;
+
+    /**
+     * Serialize the component reference
+     * @param reference
+     * @param writer
+     * @throws IOException
+     */
+    void write(RuntimeComponentReference reference, Writer writer) throws IOException;
+
+    /**
+     * Get the CallableReference for a given component reference
+     * @param <B>
+     * @param businessInterface The business interface
+     * @param reference The reference to be wired
+     * @param binding The binding to be used, if it's null, either binding.sca or the 1st binding
+     * will be selected
+     * @return A service reference representing the wire
+     */
+    <B> ServiceReference<B> getServiceReference(Class<B> businessInterface,
+                                                RuntimeComponentReference reference,
+                                                Binding binding);
+
+    /**
+     * Bind the reference to a target component/componentService
+     * @param <B>
+     * @param businessInterface The business interface
+     * @param reference The reference to be wired
+     * @param component The target component
+     * @param service The target component service
+     * @return A service reference representing the wire
+     */
+    <B> ServiceReference<B> getServiceReference(Class<B> businessInterface,
+                                                RuntimeComponentReference reference,
+                                                RuntimeComponent component,
+                                                RuntimeComponentService service);
+
+    /**
+     * Create a CallableReference for the given component service
+     * @param <B>
+     * @param businessInterface
+     * @param component
+     * @param service
+     * @return
+     */
+    <B> CallableReference<B> getCallableReference(Class<B> businessInterface,
+                                                  RuntimeComponent component,
+                                                  RuntimeComponentService service);
+
+    /**
+     * @param <B>
+     * @param businessInterface
+     * @param service
+     * @return
+     */
+    <B> ServiceReference<B> createSelfReference(Class<B> businessInterface, ComponentService service);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentReference.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentReference.java
new file mode 100644
index 0000000000..44ae7f552a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentReference.java
@@ -0,0 +1,119 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.endpointresolver.EndpointResolver;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.PolicyProvider;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+
+/**
+ * The runtime component reference. Provides the bridge between the 
+ * assembly model representation of a component reference and its runtime 
+ * realization
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeComponentReference extends ComponentReference {
+
+    /**
+     * Get a list of runtime wires to the reference
+     * 
+     * @return The list of wires
+     */
+    List<RuntimeWire> getRuntimeWires();
+    
+    /**
+     * Get the runtime wire for the given binding
+     * @param binding The assembly model binding 
+     * @return The runtime wire
+     */
+    RuntimeWire getRuntimeWire(Binding binding);
+
+    /**
+     * Returns the reference binding provider associated with this
+     * component reference and the given binding.
+     * 
+     * @param binding The assembly model binding 
+     * @return The runtime reference binding provider
+     */
+    ReferenceBindingProvider getBindingProvider(Binding binding);
+    
+    /**
+     * Sets the reference binding provider associated with this
+     * component reference and the given binding.
+     * 
+     * @param binding The assembly model binding 
+     * @param bindingProvider The runtime reference binding provider
+     */
+    void setBindingProvider(Binding binding, ReferenceBindingProvider bindingProvider);
+    
+    /**
+     * Returns the endpoint resolver associated with this
+     * component reference and the given endpoint.
+     * 
+     * @param endpont The assembly model endpoint 
+     * @return The enpoint resolver
+     */
+    EndpointResolver getEndpointResolver(Endpoint endpoint);
+    
+    /**
+     * Sets the endpoint resolver associated with this
+     * component reference and the given endpoint.
+     * 
+     * @param binding The assembly model binding 
+     * @param bindingProvider The runtime reference binding provider
+     */
+    void setEndpointResolver(Endpoint endpoint, EndpointResolver endpointResolver);    
+    
+    /**
+     * Add a policy provider for the given binding to the reference
+     * @param binding The assembly model binding
+     * @param policyProvider The policy handler
+     */
+    void addPolicyProvider(Binding binding, PolicyProvider policyProvider);
+    
+    /**
+     * Get a list of policy providers for the given binding
+     * @param binding The assembly model binding
+     * @return A list of policy providers for the given binding
+     */
+    List<PolicyProvider> getPolicyProviders(Binding binding);    
+    
+    /**
+     * Get the invoker for the given binding and operation
+     * @param binding The assembly model binding
+     * @param operation The assembly model operation
+     * @return The runtime Invoker
+     */
+    Invoker getInvoker(Binding binding, Operation operation); 
+    
+    /**
+     * Set the owning component
+     * @param component
+     */
+    void setComponent(RuntimeComponent component);
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentService.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentService.java
new file mode 100644
index 0000000000..982724d798
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeComponentService.java
@@ -0,0 +1,138 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.PolicyProvider;
+import org.apache.tuscany.sca.provider.ServiceBindingProvider;
+
+/**
+ * The runtime component service. Provides the bridge between the 
+ * assembly model representation of a component service and its runtime 
+ * realization
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeComponentService extends ComponentService {
+
+    /**
+     * Get a list of runtime wires to the service
+     * 
+     * @return The list of wires
+     */
+    List<RuntimeWire> getRuntimeWires();
+    /**
+     * Get the runtime wire for the given binding
+     * @param binding The assembly model binding 
+     * @return The runtime wire
+     */
+    RuntimeWire getRuntimeWire(Binding binding);
+    
+    /**
+     * Get the callback wires associated with this service
+     * 
+     * @return The list of runtime callback wires
+     */
+    List<RuntimeWire> getCallbackWires();
+
+    /**
+     * Returns the service binding provider associated with this
+     * component service and the given binding.
+     * 
+     * @param binding The assembly model binding 
+     * @return The runtime service binding provider
+     */
+    ServiceBindingProvider getBindingProvider(Binding binding);
+    
+    /**
+     * Returns the service binding provider associated with this
+     * component service and the given binding.
+     * 
+     * @param binding
+     * @param interfaceContract
+     * @return
+     */
+    RuntimeWire getRuntimeWire(Binding binding, InterfaceContract interfaceContract);
+    
+    /**
+     * Sets the service binding provider associated with this
+     * component service and the given binding.
+     *
+     * @param binding The assembly model binding 
+     * @param bindingProvider The runtime service binding provider
+     */
+    void setBindingProvider(Binding binding, ServiceBindingProvider bindingProvider);
+    
+    /**
+     * Get the invoker for the given binding and operation
+     * @param binding The assembly model binding 
+     * @param operation The assembly model operation
+     * @return The runtime invoker
+     */
+    Invoker getInvoker(Binding binding, Operation operation);    
+
+    /**
+     * Get the invoker for the given binding and operation
+     * @param binding The assembly model binding 
+     * @param interfaceContract the client interface contract
+     * @param operation The assembly model operation
+     * @return The runtime invoker
+     */
+    Invoker getInvoker(Binding binding, InterfaceContract interfaceContract, Operation operation);    
+    
+    /**
+     * Get the invocation chain for the given binding and operation
+     * @param binding The assembly model binding 
+     * @param operation The assembly model operation
+     * @return The runtime invocation chain
+     */
+    InvocationChain getInvocationChain(Binding binding, Operation operation);  
+    
+    /**
+     * Get the invocation chain for the given binding and operation
+     * @param binding The assembly model binding 
+     * @param operation The assembly model operation
+     * @param interfaceContract the client interface contract
+     * @return The runtime invocation chain
+     */
+    InvocationChain getInvocationChain(Binding binding, InterfaceContract interfaceContract, Operation operation);
+    
+    /**
+     * Add a policy provider for the given binding to the service
+     * @param binding The assembly model binding
+     * @param policyProvider The policy handler
+     */
+    void addPolicyProvider(Binding binding, PolicyProvider policyProvider);
+    
+    /**
+     * Get a list of policy providers for the given binding
+     * @param binding The assembly model binding
+     * @return A list of policy providers for the given binding
+     */
+    List<PolicyProvider> getPolicyProviders(Binding binding);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWire.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWire.java
new file mode 100644
index 0000000000..da37385af1
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWire.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.List;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Message;
+
+/**
+ * The runtime wire interface that connects a component reference to a 
+ *  component service (or an external service) over the selected binding
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeWire extends Cloneable {
+
+    /**
+     * Get the source of the wire
+     * 
+     * @return The end point reference of the source
+     */
+    EndpointReference getSource();
+
+    /**
+     * Get the target of the wire
+     * 
+     * @return The end point reference of the target
+     */
+    EndpointReference getTarget();
+
+    /**
+     * Rebind the runtime wire with the given target
+     * @param target The target endpoint reference
+     */
+    void setTarget(EndpointReference target);
+    
+    /**
+     * Force the invocation chains to be rebuilt
+     */
+    void rebuild();
+
+    /**
+     * Returns the invocation chains for service operations associated with the
+     * wire
+     * 
+     * @return the invocation chains for service operations associated with the
+     *         wire
+     */
+    List<InvocationChain> getInvocationChains();
+    
+    /**
+     * Lookup the invocation chain by operation
+     * @param operation The operation
+     * @return The invocation chain for the given operation
+     */
+    InvocationChain getInvocationChain(Operation operation);
+    
+    /**
+     * Invoke an operation with given arguments
+     * @param operation The operation
+     * @param args The arguments
+     * @return The result
+     * @throws InvocationTargetException
+     */
+    Object invoke(Operation operation, Object[] args) throws InvocationTargetException;
+
+    /**
+     * Invoke an operation with a context message
+     * @param operation The operation
+     * @param msg The message
+     * @return The result
+     * @throws InvocationTargetException
+     */
+    Object invoke(Operation operation, Message msg) throws InvocationTargetException;
+
+    /**
+     * @return a clone of the runtime wire
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessor.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessor.java
new file mode 100644
index 0000000000..fbb7aae467
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessor.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.runtime;
+
+/**
+ * Implementations are called after wires are decorated with policy and before they are connected.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeWireProcessor {
+
+    /**
+     * Process the runtime wire to add interceptors
+     * 
+     * @param wire
+     */
+    void process(RuntimeWire wire);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessorExtensionPoint.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessorExtensionPoint.java
new file mode 100644
index 0000000000..4b2c71b397
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeWireProcessorExtensionPoint.java
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.runtime;
+
+import java.util.List;
+
+/**
+ * Acts as a delegating <code>WireProcessorExtensionPoint</code>, delegating
+ * processing of wires after policies have been applied and source and targets
+ * have been connected.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RuntimeWireProcessorExtensionPoint {
+
+    /**
+     * Registers a wire-processor in the runtime
+     * 
+     * @param processor The processor to register
+     */
+    void addWireProcessor(RuntimeWireProcessor processor);
+
+    /**
+     * De-registers a wire-processor in the runtime
+     * 
+     * @param processor The processor to de-register
+     */
+    void removeWireProcessor(RuntimeWireProcessor processor);
+
+    /**
+     * Returns a list of registered wire-processors.
+     * 
+     * @return The list of wire processors
+     */
+    List<RuntimeWireProcessor> getWireProcessors();
+    
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/DuplicateRecordException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/DuplicateRecordException.java
new file mode 100644
index 0000000000..7d5cd6c54b
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/DuplicateRecordException.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+/**
+ * thrown when a record already exists during an insert operation
+ *
+ * @version $Rev$ $Date$
+ */
+public class DuplicateRecordException extends StoreWriteException {
+    private static final long serialVersionUID = 3116253222569378447L;
+
+    /**
+     * {@inheritDoc}
+     */
+    public DuplicateRecordException() {
+        super();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public DuplicateRecordException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public DuplicateRecordException(String message) {
+        super(message);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public DuplicateRecordException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/RecoveryListener.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/RecoveryListener.java
new file mode 100644
index 0000000000..9d965a3369
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/RecoveryListener.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+import java.util.UUID;
+
+/**
+ * Implementations receive callback events during a store recovery operation
+ *
+ * @version $Rev$ $Date$
+ */
+public interface RecoveryListener {
+
+    /**
+     * Signals the start of a recovery
+     */
+    void onBegin();
+
+    /**
+     * Received when a record is recovered
+     *
+     * @param id
+     */
+    void onRecord(UUID id);
+
+    /**
+     * Signals the end of recovery
+     */
+    void onEnd();
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/Store.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/Store.java
new file mode 100644
index 0000000000..b15cde066a
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/Store.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+import org.apache.tuscany.sca.event.EventPublisher;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * Implementations provide a persistent store for runtime data such as conversational state. A persistent store could be
+ * implemented in a durable fashion using JDBC or a journaling system, or using a non-durable mechanism such as an
+ * in-memory map.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface Store extends EventPublisher {
+
+    /* Used to indicate an the default expiration offset for records for the store */
+    long DEFAULT_EXPIRATION_OFFSET = -1;
+
+    /* Used to indicate an entry should not expire */
+    long NEVER = -2;
+
+    /**
+     * Adds the given record to the store. Implementations may choose different strategies for writing data such as
+     * write-through or write-behind.
+     *
+     * @param owner      the instance owner
+     * @param id         the unique id of the record
+     * @param object     the object representing the data to write
+     * @param expiration the time in milliseconds when the entry expires
+     * @throws StoreWriteException if an error occurs during the write operation
+     */
+    void insertRecord(RuntimeComponent owner, String id, Object object, long expiration) throws StoreWriteException;
+
+    /**
+     * Updates a given record in the store, overwriting previous information.
+     *
+     * @param owner      the instance owner
+     * @param id         the unique id of the record
+     * @param object     the object representing the data to write
+     * @param expiration the time in milliseconds when the entry expires
+     * @throws StoreWriteException
+     */
+    void updateRecord(RuntimeComponent owner, String id, Object object, long expiration) throws StoreWriteException;
+
+    /**
+     * Returns the deserialized object in the store corresponding to the given id
+     *
+     * @param owner the instance owner
+     * @param id    the unique id of the record
+     * @return the deserialized object or null if one is not found
+     * @throws StoreReadException
+     */
+    Object readRecord(RuntimeComponent owner, String id) throws StoreReadException;
+
+    /**
+     * Removes a record from the store
+     *
+     * @param owner the instance owner
+     * @param id    the unique id of the record
+     * @throws StoreWriteException
+     */
+    void removeRecord(RuntimeComponent owner, String id) throws StoreWriteException;
+
+    /**
+     * Removes all records from the store
+     *
+     * @throws StoreWriteException
+     */
+    void removeRecords() throws StoreWriteException;
+
+    /**
+     * Initiates a recovery operation, for example during restart after a crash
+     *
+     * @param listener the listener to receive recovery callback events
+     * @throws StoreReadException
+     */
+    void recover(RecoveryListener listener) throws StoreReadException;
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreException.java
new file mode 100644
index 0000000000..24eaddd3e0
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreException.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+
+/**
+ * Represents a generic exception thrown by a <code>Store</code>
+ *
+ * @version $Rev$ $Date$
+ */
+public class StoreException extends Exception {
+    private static final long serialVersionUID = -319152147419962709L;
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreException() {
+        super();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreException(String message) {
+        super(message);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreExpirationEvent.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreExpirationEvent.java
new file mode 100644
index 0000000000..5c1a3ca79d
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreExpirationEvent.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+import org.apache.tuscany.sca.event.Event;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * Fired when a store implementation expires a resource
+ *
+ * @version $Rev$ $Date$
+ */
+public class StoreExpirationEvent implements Event {
+    private Object source;
+    private RuntimeComponent owner;
+    private Object instance;
+
+    /**
+     * Constructor.
+     *
+     * @param source   the source of the event
+     * @param owner    the owner of the expiring object
+     * @param instance the expiring object
+     */
+    public StoreExpirationEvent(Object source, RuntimeComponent owner, Object instance) {
+        assert source != null;
+        assert owner != null;
+        assert instance != null;
+        this.source = source;
+        this.owner = owner;
+        this.instance = instance;
+    }
+
+    public Object getSource() {
+        return source;
+    }
+
+    /**
+     * Returns the owner of the expiring object.
+     *
+     * @return the owner of the expiring object.
+     */
+    public RuntimeComponent getOwner() {
+        return owner;
+    }
+
+    /**
+     * Returns the expiring object.
+     *
+     * @return the expiring object.
+     */
+    public Object getInstance() {
+        return instance;
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreMonitor.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreMonitor.java
new file mode 100644
index 0000000000..4bc7facf39
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreMonitor.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+
+/**
+ * A generic monitor interface for services to log events
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface StoreMonitor {
+
+    /**
+     * Signals the service has started
+     * 
+     * @param msg
+     */
+    void start(String msg);
+
+    /**
+     * Signals the service has been shutdown
+     * 
+     * @param msg
+     */
+    void stop(String msg);
+
+    /**
+     * Fired when recovery is started
+     */
+
+    void beginRecover();
+
+    /**
+     * Fired when recovery is completed
+     */
+
+    void endRecover();
+
+    /**
+     * Fired when a record is processed during recovery
+     * 
+     * @param recordId the id of the record being recovered
+     */
+
+    void recover(Object recordId);
+
+    /**
+     * Signals an error event
+     * 
+     * @param e the error
+     */
+
+    void error(Throwable e);
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreReadException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreReadException.java
new file mode 100644
index 0000000000..c2346bddca
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreReadException.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+/**
+ * Thrown when an error occurs reading from persistent storage
+ *
+ * @version $Rev$ $Date$
+ */
+public class StoreReadException extends StoreException {
+    private static final long serialVersionUID = -8624542082121467271L;
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreReadException() {
+        super();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreReadException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreReadException(String message) {
+        super(message);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreReadException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreWriteException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreWriteException.java
new file mode 100644
index 0000000000..b37519b31c
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/store/StoreWriteException.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.store;
+
+/**
+ * Thrown when an error occurs writing to persistent storage
+ *
+ * @version $Rev$ $Date$
+ */
+public class StoreWriteException extends StoreException {
+    private static final long serialVersionUID = 5539070473942048555L;
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreWriteException() {
+        super();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreWriteException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreWriteException(String message) {
+        super(message);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public StoreWriteException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java
new file mode 100644
index 0000000000..d32af450ff
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.work;
+
+/**
+ * A callback interface that can be optionally used for registering 
+ * interest in status of asynchronously scheduled unit of work.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface NotificationListener<T extends Runnable> {
+    
+    /**
+     * Callback method when the unit of work is accepted.
+     * 
+     * @param work Work that was accepted.
+     */
+    void workAccepted(T work);
+    
+    /**
+     * Callback method when the unit of work is successfully completed.
+     * 
+     * @param work Work that was successfully completed.
+     */
+    void workCompleted(T work);
+    
+    /**
+     * Callback when the unit of work is started.
+     * 
+     * @param work Unit of work that was started.
+     */
+    void workStarted(T work);
+    
+    /**
+     * Callback when the unit of work is rejected.
+     * 
+     * @param work Unit of work that was rejected.
+     */
+    void workRejected(T work);
+    
+    /**
+     * Callback when the unit of work fails to complete.
+     * 
+     * @param work Unit of work that failed to complete.
+     * @param error Error that caused the unit of work to fail.
+     */
+    void workFailed(T work, Throwable error);
+    
+    
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkScheduler.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkScheduler.java
new file mode 100644
index 0000000000..b1beac78e2
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkScheduler.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.work;
+
+/**
+ * Defines the contract for scheduling asynchronous units of work.
+ * 
+ * <p>
+ * Units of work can be scheduled with an optional <code>NotificationListener</code>.
+ * If a notification listener is specified, the caller will be notified regarding the 
+ * status of the work. The unit of work can either be completed, rejected or completed 
+ * with an error. If the work completed with an error, the caller is notified with the 
+ * error details.
+ * </p>
+ *
+ * @version $Rev$ $Date$
+ */
+public interface WorkScheduler {
+    
+    /**
+     * Schedules a unit of work for future execution. The notification listener 
+     * is used to register interest in callbacks regarding the status of the work.
+     * 
+     * @param work The unit of work that needs to be asynchronously executed.
+     * @param listener Notification listener for callbacks.
+     */
+    <T extends Runnable>void scheduleWork(T work, NotificationListener<T> listener);
+    
+    /**
+     * Schedules a unit of work for future execution. The notification listener 
+     * is used to register interest in callbacks regarding the status of the work.
+     * 
+     * @param work The unit of work that needs to be asynchronously executed.
+     */
+    <T extends Runnable>void scheduleWork(T work);
+
+    /**
+     * Destroys the work scheduler
+     */
+    void destroy();
+
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkSchedulerException.java b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkSchedulerException.java
new file mode 100644
index 0000000000..18ec2dfeaa
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/WorkSchedulerException.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.work;
+
+
+/**
+ * Exception thrown by the work scheduler in case of unexpected exceptions.
+ *
+ * @version $Rev$ $Date$
+ *
+ * @version $Rev$ $Date$
+ */
+public class WorkSchedulerException extends RuntimeException {
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * {@inheritDoc}
+     */
+    public WorkSchedulerException() {
+        super();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public WorkSchedulerException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public WorkSchedulerException(String message) {
+        super(message);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public WorkSchedulerException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.context.ContextFactoryExtensionPoint b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.context.ContextFactoryExtensionPoint
new file mode 100644
index 0000000000..ddd91bceac
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.context.ContextFactoryExtensionPoint
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.context.DefaultContextFactoryExtensionPoint
diff --git a/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.endpointresolver.EndpointResolverFactoryExtensionPoint b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.endpointresolver.EndpointResolverFactoryExtensionPoint
new file mode 100644
index 0000000000..91839e998f
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.endpointresolver.EndpointResolverFactoryExtensionPoint
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.endpointresolver.DefaultEndpointResolverFactoryExtensionPoint
diff --git a/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint
new file mode 100644
index 0000000000..e9de1f135f
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ProviderFactoryExtensionPoint
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.provider.DefaultProviderFactoryExtensionPoint
diff --git a/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProviderExtensionPoint b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProviderExtensionPoint
new file mode 100644
index 0000000000..2f700671ca
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProviderExtensionPoint
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one

+# or more contributor license agreements.  See the NOTICE file

+# distributed with this work for additional information

+# regarding copyright ownership.  The ASF licenses this file

+# to you under the Apache License, Version 2.0 (the

+# "License"); you may not use this file except in compliance

+# with the License.  You may obtain a copy of the License at

+# 

+#   http://www.apache.org/licenses/LICENSE-2.0

+# 

+# Unless required by applicable law or agreed to in writing,

+# software distributed under the License is distributed on an

+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+# KIND, either express or implied.  See the License for the

+# specific language governing permissions and limitations

+# under the License. 

+

+org.apache.tuscany.sca.provider.DefaultSCADefinitionsProviderExtensionPoint

+										
\ No newline at end of file
diff --git a/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.RuntimeWireProcessorExtensionPoint b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.RuntimeWireProcessorExtensionPoint
new file mode 100644
index 0000000000..95591dca5d
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.RuntimeWireProcessorExtensionPoint
@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.runtime.DefaultWireProcessorExtensionPoint
diff --git a/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPointTestCase.java b/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPointTestCase.java
new file mode 100644
index 0000000000..3a27569a3b
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/context/DefaultContextFactoryExtensionPointTestCase.java
@@ -0,0 +1,208 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.context;
+
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * This test case will test the class
+ * org.apache.tuscany.sca.context.DefaultContextFactoryExtensionPoint
+ *
+ * $Date$ $Rev$
+ */
+public class DefaultContextFactoryExtensionPointTestCase {
+
+    /**
+     * Tests adding/getting/removing a factory with no interfaces
+     */
+    @Test
+    public void testFactoryWithNoInterfaces() {
+        Object factory = new FactoryWithNoInterfaces();
+        Class<?>[] ifaces = {};
+        addGetRemoveFactory(factory, ifaces);
+    }
+
+    /**
+     * Tests adding/getting/removing a factory with one interface
+     */
+    @Test
+    public void testFactoryWithOneInterface() {
+        Object factory = new FactoryWithOneInterface();
+        Class<?>[] ifaces = { FactoryOneInterface.class };
+        addGetRemoveFactory(factory, ifaces);
+    }
+
+    /**
+     * Tests adding/getting/removing a factory with two interfaces
+     */
+    @Test
+    public void testFactoryWithTwoInterfaces() {
+        Object factory = new FactoryWithTwoInterfaces();
+        Class<?>[] ifaces = { FactoryTwoInterfacesA.class, FactoryTwoInterfacesB.class };
+        addGetRemoveFactory(factory, ifaces);
+    }
+
+    /**
+     * Tests having multiple factories registered
+     */
+    @Test
+    public void testMultipleFactories() {
+        // Create new factories
+        FactoryWithOneInterface factory1 = new FactoryWithOneInterface();
+        FactoryWithTwoInterfaces factory2 = new FactoryWithTwoInterfaces();
+
+        ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
+
+        // Register the factories
+        DefaultContextFactoryExtensionPoint ctxFactory = new DefaultContextFactoryExtensionPoint(registry);
+        ctxFactory.addFactory(factory1);
+        ctxFactory.addFactory(factory2);
+
+        // Re-get each of the factories
+        FactoryOneInterface regotFactory1 = ctxFactory.getFactory(FactoryOneInterface.class);
+        Assert.assertNotNull(regotFactory1);
+        Assert.assertSame(factory1, regotFactory1);
+        FactoryTwoInterfacesA regotFactory2A = ctxFactory.getFactory(FactoryTwoInterfacesA.class);
+        Assert.assertNotNull(regotFactory2A);
+        Assert.assertSame(factory2, regotFactory2A);
+        FactoryTwoInterfacesB regotFactory2B = ctxFactory.getFactory(FactoryTwoInterfacesB.class);
+        Assert.assertNotNull(regotFactory1);
+        Assert.assertSame(factory2, regotFactory2B);
+    }
+
+    /**
+     * Tests passing in null to addFactory()
+     */
+    @Test
+    public void testAddingNullFactory() {
+
+        ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
+        DefaultContextFactoryExtensionPoint ctxFactory = new DefaultContextFactoryExtensionPoint(registry);
+        try {
+            ctxFactory.addFactory(null);
+            Assert.fail("Should have thrown IllegalArgumentException");
+        } catch (IllegalArgumentException ex) {
+            // As expected
+        }
+    }
+
+    /**
+     * Test passing in null to removeFactory()
+     */
+    @Test
+    public void testRemovingNullFactory() {
+        ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
+        DefaultContextFactoryExtensionPoint ctxFactory = new DefaultContextFactoryExtensionPoint(registry);
+        try {
+            ctxFactory.removeFactory(null);
+            Assert.fail("Should have thrown IllegalArgumentException");
+        } catch (IllegalArgumentException ex) {
+            // As expected
+        }
+    }
+
+    /**
+     * Test passing in null to getFactory()
+     */
+    @Test
+    public void testGetNullFactory() {
+        ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
+        DefaultContextFactoryExtensionPoint ctxFactory = new DefaultContextFactoryExtensionPoint(registry);
+        try {
+            ctxFactory.getFactory(null);
+            Assert.fail("Should have thrown IllegalArgumentException");
+        } catch (IllegalArgumentException ex) {
+            // As expected
+        }
+    }
+
+    /**
+     * Utility method for testing adding and removing a factory
+     *
+     * @param factory The factory class to test
+     * @param factoryInterfaces The list of interfaces implemented by the factory
+     */
+    private void addGetRemoveFactory(Object factory, Class<?>[] factoryInterfaces) {
+        ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
+        DefaultContextFactoryExtensionPoint ctxFactory = new DefaultContextFactoryExtensionPoint(registry);
+
+        // Make sure factory not already present
+        for (Class<?> iface : factoryInterfaces) {
+            Assert.assertNull(ctxFactory.getFactory(iface));
+        }
+
+        // Add the factory
+        ctxFactory.addFactory(factory);
+
+        // Make sure we can get the factory recently registered factory
+        for (Class<?> iface : factoryInterfaces) {
+            Object regot = ctxFactory.getFactory(iface);
+            Assert.assertNotNull(regot);
+            Assert.assertSame(factory, regot);
+        }
+
+        // Remove the factory
+        ctxFactory.removeFactory(factory);
+
+        // Make sure factory is no longer registered
+        for (Class<?> iface : factoryInterfaces) {
+            Assert.assertNull(ctxFactory.getFactory(iface));
+        }
+    }
+
+    /**
+     * Simple factory with no interfaces
+     */
+    private class FactoryWithNoInterfaces {
+    }
+
+    /**
+     * Simple interface for the factory with one interface
+     */
+    private interface FactoryOneInterface {
+    }
+
+    /**
+     * Simple factory with one interface
+     */
+    private class FactoryWithOneInterface implements FactoryOneInterface {
+    }
+
+    /**
+     * Simple interface for the factory with two interfaces
+     */
+    private interface FactoryTwoInterfacesA {
+    }
+
+    /**
+     * Simple interface for the factory with two interfaces
+     */
+    private interface FactoryTwoInterfacesB {
+    }
+
+    /**
+     * Simple factory with two interfaces
+     */
+    private class FactoryWithTwoInterfaces implements FactoryTwoInterfacesA, FactoryTwoInterfacesB {
+    }
+}
diff --git a/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/event/TrueFilterTestCase.java b/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/event/TrueFilterTestCase.java
new file mode 100644
index 0000000000..2425133273
--- /dev/null
+++ b/branches/sca-equinox/modules/core-spi/src/test/java/org/apache/tuscany/sca/event/TrueFilterTestCase.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.event;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test case for TrueFilter
+ *
+ * @version $Rev$ $Date$
+ */
+public class TrueFilterTestCase {
+
+    /**
+     * Test TrueFilter matching an event
+     */
+    @Test
+    public void testTrueFilterMatch() {
+        EventFilter filter = new TrueFilter();
+
+        Assert.assertTrue(filter.match(new DummyEvent()));
+    }
+
+    /**
+     * Test TrueFilter matching null
+     */
+    @Test
+    public void testTrueFilterMatchNull() {
+        EventFilter filter = new TrueFilter();
+
+        Assert.assertTrue(filter.match(null));
+    }
+
+    /**
+     * Dummy Event implementation for testing
+     */
+    private class DummyEvent implements Event {
+
+        /**
+         * {@inheritDoc}
+         */
+        public Object getSource() {
+            throw new UnsupportedOperationException();
+        }
+   }
+}