Creating a branch for the equinox work.

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

19 files changed, 1015 insertions, 0 deletions

diff --git a/branches/sca-equinox/samples/implementation-crud-extension/README b/branches/sca-equinox/samples/implementation-crud-extension/README
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@@ -0,0 +1,83 @@
+Implementation CRUD Sample
+==========================
+This sample demonstrates how new implementation types are constructed for 
+Apache Tuscany SCA. 
+
+The README in the samples directory (the directory above this) provides 
+general instructions about building and running samples. Take a look there 
+first. 
+
+If you want to try out the CRUD implementation type that this sample provides
+please see the implementation-crud sample that provides the necessary client
+code to bring up an application that uses this implementation extension.
+
+Sample Overview
+---------------
+This sample contains a CRUD implementation type as an example of how to create
+new implementation types. Components using this implementation type always
+expose the same Create, Retrieve, Update and Delete interface. This sample
+uses a singleton ResourceManager to perform the CRUD operations but of course
+a real component would provide a real implementation. 
+
+implementation-crud-extension/
+  src/
+    main/
+      java/
+        crud/                  - implementation model interfaces
+          backend/             - fake component implementation
+          impl/                - implementations of the model interfaces
+          provider/            - runtime implementation
+      resources/
+        META-INF/
+          services/            - declares the extension
+    test/
+      java/
+        crud/
+          CRUDTestCase.java    - JUnit test case
+      resources/
+        crud.composite         - the SCA assembly used during unit testing
+
+  build.xml                    - the Ant build file
+  pom.xml                      - the Maven build file
+  
+Building The Sample Extension Using Ant
+-----------------------------------------
+With the binary distribution the sample extension can be built using Ant as 
+follows
+
+cd implementation-crud-extension
+ant compile
+
+See the implementation-crud sample to run a sample that uses this
+implementation extension.
+
+Building The Sample Using Maven 
+-------------------------------------------
+With either the binary or source distributions the sample can be built 
+using Maven as follows. 
+
+cd implementation-crud-extension
+mvn
+
+Maven will also test that the sample extension built properly. You should see 
+the following output from the test phase.
+
+-------------------------------------------------------
+ T E S T S
+-------------------------------------------------------
+Running crud.CRUDTestCase
+Starting CRUDServiceComponent
+create(ABC) in tmp
+retrieve(0)
+update(0)
+retrieve(0)
+delete(0)
+retrieve(0)
+Stopping CRUDServiceComponent
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.212 sec
+
+Results :
+
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
+
+This shows that the Junit test cases have run successfully. 
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/build.xml b/branches/sca-equinox/samples/implementation-crud-extension/build.xml
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index 0000000000..88d308e6fc
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/build.xml
@@ -0,0 +1,51 @@
+<!--
+ * 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 name="implementation-crud-extension" default="compile">
+	<property name="test.jar"   value="sample-implementation-crud-extension.jar" />
+	
+    <target name="init">
+        <mkdir dir="target/classes"/>
+    </target>
+	
+    <target name="compile" depends="init">
+        <javac srcdir="src/main/java"
+               destdir="target/classes"
+               debug="on"
+               source="1.5"
+               target="1.5">
+            <classpath>
+            	<pathelement location="../../lib/tuscany-sca-manifest.jar"/>
+            </classpath>
+        </javac> 
+        <copy todir="target/classes">
+            <fileset dir="src/main/resources"/>
+        </copy>
+        <jar destfile="target/${test.jar}" basedir="target/classes">
+            <manifest>
+                <attribute name="Main-Class" value="${test.class}" /> 
+            </manifest>
+        </jar>    	
+    </target>	
+		
+    <target name="clean">
+        <delete quiet="true" includeemptydirs="true">
+            <fileset dir="target"/>
+        </delete>
+    </target>
+</project>
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/pom.xml b/branches/sca-equinox/samples/implementation-crud-extension/pom.xml
new file mode 100644
index 0000000000..c11953f0ac
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/pom.xml
@@ -0,0 +1,77 @@
+<?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-sca</artifactId>
+        <version>1.4-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <artifactId>sample-implementation-crud-extension</artifactId>
+    <name>Apache Tuscany SCA CRUD Implementation Extension Sample</name>
+
+    <repositories>
+       <repository>
+          <id>apache.incubator</id>
+          <url>http://people.apache.org/repo/m2-incubating-repository</url>
+       </repository>
+    </repositories>
+
+    <dependencies>
+        <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-interface-java-xml</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>        
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-core-spi</artifactId>
+            <version>1.4-SNAPSHOT</version>
+        </dependency>        
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-host-embedded</artifactId>
+            <version>1.4-SNAPSHOT</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.2</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+       <finalName>${artifactId}</finalName>
+    </build>
+
+</project>
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUD.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUD.java
new file mode 100644
index 0000000000..b23d85887b
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUD.java
@@ -0,0 +1,54 @@
+/*
+ * 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 crud;
+
+/**
+ * The service interface of the single CRUD service provided by CRUD components.
+ */
+public interface CRUD {
+
+    /**
+     * Create a new resource.
+     * @param resource
+     * @return
+     */
+    String create(Object resource);
+
+    /**
+     * Retrieve a resource.
+     * @param id
+     * @return
+     */
+    Object retrieve(String id);
+
+    /**
+     * Update a resource.
+     * @param id
+     * @param resource
+     * @return
+     */
+    Object update(String id, Object resource);
+
+    /**
+     * Delete a resource.
+     * @param id
+     */
+    void delete(String id);
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementation.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementation.java
new file mode 100644
index 0000000000..49be844f93
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementation.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 crud;
+
+import org.apache.tuscany.sca.assembly.Implementation;
+
+/**
+ * The model representing a sample CRUD implementation in an SCA assembly model.
+ * 
+ * The sample CRUD implementation is not a full blown implementation, it only
+ * supports a subset of what a component implementation can support:
+ * - a single fixed service (as opposed to a list of services typed by different interfaces
+ * - a directory attribute used to specify where a CRUD component is going to persist
+ * resources
+ * - no references or properties
+ * - no policy intents or policy sets
+ */
+public interface CRUDImplementation extends Implementation {
+
+    /**
+     * Returns the directory used by CRUD implementations to persist resources.
+     * 
+     * @return the directory used to persist resources
+     */
+    public String getDirectory();
+
+    /**
+     * Sets the directory used by CRUD implementations to persist resources.
+     * 
+     * @param directory the directory used to persist resources
+     */
+    public void setDirectory(String directory);
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementationFactory.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementationFactory.java
new file mode 100644
index 0000000000..fa83c63c1b
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/CRUDImplementationFactory.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 crud;
+
+import crud.CRUDImplementation;
+
+
+/**
+ * A factory for the sample CRUD implementation model.
+ */
+public interface CRUDImplementationFactory {
+    
+    /**
+     * Creates a new CRUD implementation.
+     * 
+     * @return
+     */
+    CRUDImplementation createCRUDImplementation();
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/backend/ResourceManager.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/backend/ResourceManager.java
new file mode 100644
index 0000000000..cc0795a735
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/backend/ResourceManager.java
@@ -0,0 +1,90 @@
+/*
+ * 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 crud.backend;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A fake resource manager implementation used as a backend by the sample
+ * CRUD component implementation.
+ */
+public class ResourceManager {
+    private static int counter;
+    private static final Map<String, Object> store = new HashMap<String, Object>();
+    private String directory;
+
+    /**
+     * Constructs a new resource manager.
+     * 
+     * @param directory the directory where to persist resources
+     */
+    public ResourceManager(String directory) {
+        super();
+        this.directory = directory;
+    }
+
+    /**
+     * Creates a new resource.
+     * 
+     * @param resource
+     * @return
+     */
+    public String createResource(Object resource) {
+        System.out.println("create(" + resource + ") in " + directory);
+        String key = String.valueOf(counter++);
+        store.put(key, resource);
+        return key;
+    }
+
+    /**
+     * Deletes a resource.
+     * 
+     * @param id
+     */
+    public void deleteResource(String id) {
+        System.out.println("delete(" + id + ")");
+        store.remove(id);
+    }
+
+    /**
+     * Retrieves a resource.
+     * 
+     * @param id
+     * @return
+     */
+    public Object retrieveResource(String id) {
+        System.out.println("retrieve(" + id + ")");
+        return store.get(id);
+    }
+
+    /**
+     * Updates a resource.
+     * 
+     * @param id
+     * @param resource
+     * @return
+     */
+    public Object updateResource(String id, Object resource) {
+        System.out.println("update(" + id + ")");
+        return store.put(id, resource);
+    }
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationFactoryImpl.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationFactoryImpl.java
new file mode 100644
index 0000000000..2f1e5fcba8
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationFactoryImpl.java
@@ -0,0 +1,47 @@
+/*
+ * 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 crud.impl;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+
+import crud.CRUDImplementation;
+import crud.CRUDImplementationFactory;
+
+
+/**
+ * A factory for the CRUD implementation model.
+ */
+public class CRUDImplementationFactoryImpl implements CRUDImplementationFactory {
+    
+    private AssemblyFactory assemblyFactory;
+    private JavaInterfaceFactory javaFactory;
+    
+    public CRUDImplementationFactoryImpl(ModelFactoryExtensionPoint modelFactories) {
+        this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        this.javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
+    }
+
+    public CRUDImplementation createCRUDImplementation() {
+        return new CRUDImplementationImpl(assemblyFactory, javaFactory);
+    }
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationImpl.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationImpl.java
new file mode 100644
index 0000000000..383a035e69
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/impl/CRUDImplementationImpl.java
@@ -0,0 +1,117 @@
+/*
+ * 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 crud.impl;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.ConstrainingType;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+
+import crud.CRUD;
+import crud.CRUDImplementation;
+
+
+/**
+ * The model representing a sample CRUD implementation in an SCA assembly model.
+ */
+class CRUDImplementationImpl implements CRUDImplementation {
+
+    private Service crudService;
+    private String directory;
+
+    /**
+     * Constructs a new CRUD implementation.
+     */
+    CRUDImplementationImpl(AssemblyFactory assemblyFactory,
+                              JavaInterfaceFactory javaFactory) {
+
+        // CRUD implementation always provide a single service exposing
+        // the CRUD interface, and have no references and properties
+        crudService = assemblyFactory.createService();
+        crudService.setName("CRUD");
+        JavaInterface javaInterface;
+        try {
+            javaInterface = javaFactory.createJavaInterface(CRUD.class);
+        } catch (InvalidInterfaceException e) {
+            throw new IllegalArgumentException(e);
+        }
+        JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
+        interfaceContract.setInterface(javaInterface);
+        crudService.setInterfaceContract(interfaceContract);
+    }
+
+    public String getDirectory() {
+        return directory;
+    }
+
+    public void setDirectory(String directory) {
+        this.directory = directory;
+    }
+
+    public ConstrainingType getConstrainingType() {
+        // The sample CRUD implementation does not support constrainingTypes
+        return null;
+    }
+
+    public List<Property> getProperties() {
+        // The sample CRUD implementation does not support properties
+        return Collections.emptyList();
+    }
+
+    public List<Service> getServices() {
+        // The sample CRUD implementation provides a single fixed CRUD service
+        return Collections.singletonList(crudService);
+    }
+    
+    public List<Reference> getReferences() {
+        // The sample CRUD implementation does not support properties
+        return Collections.emptyList();
+    }
+
+    public String getURI() {
+        // The sample CRUD implementation does not have a URI
+        return null;
+    }
+
+    public void setConstrainingType(ConstrainingType constrainingType) {
+        // The sample CRUD implementation does not support constrainingTypes
+    }
+
+    public void setURI(String uri) {
+        // The sample CRUD implementation does not have a URI
+    }
+
+    public boolean isUnresolved() {
+        // The sample CRUD implementation is always resolved
+        return false;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        // The sample CRUD implementation is always resolved
+    }
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java
new file mode 100644
index 0000000000..b212ee3c9b
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationInvoker.java
@@ -0,0 +1,79 @@
+/*
+ * 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 crud.provider;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+
+import crud.backend.ResourceManager;
+
+
+/**
+ * Implements an invoker for CRUD component implementations.
+ * 
+ * The invoker is responsible for handling invocations of a business operation.
+ * Input business data is passed to the invoke method in a Message object.
+ * The invoke method is responsible for handling the invocation and returning a Message with
+ * the output business data. 
+ * 
+ * In this example we are simply delegating the CRUD operation invocations to the
+ * corresponding methods on our fake resource manager class.
+ * 
+ * More sophisticated invokers can delegate the invocation to an implementation artifact directly
+ * (for example a Java class using reflection as in the implementation-pojo sample) or call a runtime
+ * engine like a BPEL engine or an XQuery engine for example (this is what the Tuscany
+ * implementation-bpel and implementation-xquery extensions do).
+ */
+class CRUDImplementationInvoker implements Invoker {
+    private Operation operation;
+    private ResourceManager resourceManager;
+    
+    CRUDImplementationInvoker(Operation operation, ResourceManager resourceManager) {
+        this.operation = operation;
+        this.resourceManager = resourceManager;
+    }
+    
+    public Message invoke(Message msg) {
+        try {
+            Object[] args = msg.getBody();
+            Object resp = null;
+            
+            if (operation.getName().equals("create")) {
+                resp = resourceManager.createResource(args[0]);
+                
+            } else if (operation.getName().equals("retrieve")) {
+                resp = resourceManager.retrieveResource((String)args[0]);
+                
+            } else if (operation.getName().equals("update")) {
+                resp = resourceManager.updateResource((String)args[0], args[1]);
+                
+            } else if (operation.getName().equals("delete")) {
+                resourceManager.deleteResource((String)args[0]);
+            }
+            
+            msg.setBody(resp);
+        } catch (Exception e) {
+            msg.setFaultBody(e.getCause());
+        }
+        return msg;
+    }
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java
new file mode 100644
index 0000000000..8f11f9d910
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProvider.java
@@ -0,0 +1,75 @@
+/*
+ * 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 crud.provider;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+import crud.CRUDImplementation;
+import crud.backend.ResourceManager;
+
+
+/**
+ * An implementation provider for sample CRUD implementations.
+ * 
+ * The implementation provider is responsible for handling the lifecycle of a component
+ * implementation and creating operation invokers for the service operations provided
+ * by the implementation.
+ * 
+ * The start() and stop() methods are called when a component is started
+ * and stopped.
+ *
+ * The createInvoker method is called for each operation provided by the component
+ * implementation. The implementation provider can create an invoker and initialize it
+ * at that time to minimize the amount of work to be performed on each invocation.  
+ */
+class CRUDImplementationProvider implements ImplementationProvider {
+    
+    private RuntimeComponent component;
+    private CRUDImplementation implementation;
+
+    /**
+     * Constructs a new CRUD implementation.
+     */
+    CRUDImplementationProvider(RuntimeComponent component, CRUDImplementation implementation) {
+        this.component = component;
+        this.implementation = implementation;
+    }
+
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        CRUDImplementationInvoker invoker = new CRUDImplementationInvoker(operation, new ResourceManager(implementation.getDirectory()));
+        return invoker;
+    }
+    
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+    public void start() {
+        System.out.println("Starting " + component.getName());
+    }
+
+    public void stop() {
+        System.out.println("Stopping " + component.getName());
+    }
+
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java
new file mode 100644
index 0000000000..4566cb7155
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/java/crud/provider/CRUDImplementationProviderFactory.java
@@ -0,0 +1,51 @@
+/*
+ * 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 crud.provider;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.provider.ImplementationProviderFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+import crud.CRUDImplementation;
+import crud.provider.CRUDImplementationProvider;
+
+
+/**
+ * A factory for CRUD implementation providers.
+ * 
+ *  The factory is called to create an implementation provider for each component using
+ *  the CRUD implementation.
+ */
+public class CRUDImplementationProviderFactory implements ImplementationProviderFactory<CRUDImplementation> {
+
+    /**
+     * Constructs a new CRUD implementation.
+     */
+    public CRUDImplementationProviderFactory(ExtensionPointRegistry extensionPoints) {
+    }
+
+    public ImplementationProvider createImplementationProvider(RuntimeComponent component, CRUDImplementation implementation) {
+        return new CRUDImplementationProvider(component, implementation);
+    }
+    
+    public Class<CRUDImplementation> getModelType() {
+        return CRUDImplementation.class;
+    }
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/crud.CRUDImplementationFactory b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/crud.CRUDImplementationFactory
new file mode 100644
index 0000000000..3cf5de5fa1
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/crud.CRUDImplementationFactory
@@ -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. 

+

+# Implementation class for the implementation model factory

+crud.impl.CRUDImplementationFactoryImpl

diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..17c98cf706
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
@@ -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. 
+
+# Implementation class for the artifact processor extension
+org.apache.tuscany.sca.assembly.xml.DefaultBeanModelProcessor;qname=http://crud#implementation.crud,model=crud.CRUDImplementation,factory=crud.CRUDImplementationFactory
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.ValidationSchema b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.ValidationSchema
new file mode 100644
index 0000000000..527c626418
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.ValidationSchema
@@ -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. 
+
+# URI of the XML schema to be used for validation
+sample-implementation-crud.xsd
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory
new file mode 100644
index 0000000000..6ce605197a
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory
@@ -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. 

+

+# Implementation class for the implementation extension

+crud.provider.CRUDImplementationProviderFactory;model=crud.CRUDImplementation

diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/sample-implementation-crud.xsd b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/sample-implementation-crud.xsd
new file mode 100644
index 0000000000..447e31bf93
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/main/resources/sample-implementation-crud.xsd
@@ -0,0 +1,38 @@
+<?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.    
+-->
+<schema xmlns="http://www.w3.org/2001/XMLSchema" 
+    targetNamespace="http://crud" 
+    xmlns:sca="http://www.osoa.org/xmlns/sca/1.0"
+    xmlns:c="http://crud" 
+    elementFormDefault="qualified">
+
+    <import namespace="http://www.osoa.org/xmlns/sca/1.0"/>
+
+    <element name="implementation.crud" type="c:CRUDImplementation"/>
+    	
+    <complexType name="CRUDImplementation">
+        <complexContent>
+            <extension base="sca:Implementation">
+                <attribute name="directory" type="anyURI" use="required"/>
+            </extension>
+        </complexContent>
+    </complexType>
+
+</schema>
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/test/java/crud/CRUDTestCase.java b/branches/sca-equinox/samples/implementation-crud-extension/src/test/java/crud/CRUDTestCase.java
new file mode 100644
index 0000000000..0bb5cfc361
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/test/java/crud/CRUDTestCase.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 crud;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sca.host.embedded.SCADomain;
+
+import crud.CRUD;
+
+/**
+ * Tests the CRUD implementation extension.
+ */
+public class CRUDTestCase extends TestCase {
+
+    private SCADomain scaDomain;
+    private CRUD crudService;
+    
+    @Override
+    protected void setUp() throws Exception {
+        scaDomain = SCADomain.newInstance("crud.composite");
+        crudService = scaDomain.getService(CRUD.class, "CRUDServiceComponent");
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        scaDomain.close();
+    }
+    
+    public void testCRUD() throws Exception {
+        String id = crudService.create("ABC");
+        Object result = crudService.retrieve(id);
+        assertEquals("ABC", result);
+        
+        crudService.update(id, "EFG");
+        result = crudService.retrieve(id);
+        assertEquals("EFG", result);
+        
+        crudService.delete(id);
+        result = crudService.retrieve(id);
+        assertNull(result);
+    }
+}
diff --git a/branches/sca-equinox/samples/implementation-crud-extension/src/test/resources/crud.composite b/branches/sca-equinox/samples/implementation-crud-extension/src/test/resources/crud.composite
new file mode 100644
index 0000000000..18745033bb
--- /dev/null
+++ b/branches/sca-equinox/samples/implementation-crud-extension/src/test/resources/crud.composite
@@ -0,0 +1,30 @@
+<?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.    

+-->

+<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
+	targetNamespace="http://sample/crud"
+	xmlns:sc="http://sample/crud"
+	xmlns:c="http://crud"
+	name="crud">

+

+    <component name="CRUDServiceComponent">

+        <c:implementation.crud directory="tmp" />

+    </component>

+

+</composite>