Event prototype: Initial model changes

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@706556 13f79535-47bb-0310-9956-ffa450edef68

12 files changed, 790 insertions, 0 deletions

diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/EventBindingDefinitionsProvider.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/EventBindingDefinitionsProvider.java
new file mode 100644
index 0000000000..4ffb4d22d9
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/EventBindingDefinitionsProvider.java
@@ -0,0 +1,73 @@
+/*
+ * 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.binding.event;
+
+import java.net.URI;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedExceptionAction;
+
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.definitions.SCADefinitions;
+import org.apache.tuscany.sca.provider.SCADefinitionsProvider;
+import org.apache.tuscany.sca.provider.SCADefinitionsProviderException;
+
+/**
+ * Provider for Policy Intents and PolicySet definitions for event binding
+ *
+ * @version $$
+ */
+public class EventBindingDefinitionsProvider implements SCADefinitionsProvider {
+    private String definitionsFile = "org/apache/tuscany/sca/binding/sca/definitions.xml";
+    URLArtifactProcessor urlArtifactProcessor = null;
+    
+    public EventBindingDefinitionsProvider(ExtensionPointRegistry registry) {
+        URLArtifactProcessorExtensionPoint documentProcessors = registry.getExtensionPoint(URLArtifactProcessorExtensionPoint.class);
+        urlArtifactProcessor = (URLArtifactProcessor)documentProcessors.getProcessor(SCADefinitions.class);
+    }
+
+    public SCADefinitions getSCADefinition() throws SCADefinitionsProviderException {
+        // Allow privileged access to load resource. Requires RuntimePermssion in security policy.
+        final URL definitionsFileUrl = AccessController.doPrivileged(new PrivilegedAction<URL>() {
+            public URL run() {
+                return getClass().getClassLoader().getResource(definitionsFile);
+            }
+        });
+
+        SCADefinitions scaDefn = null;
+        try {
+            final URI uri = new URI(definitionsFile);
+            // Allow bindings to read properties. Requires PropertyPermission read in security policy. 
+            scaDefn = AccessController.doPrivileged(new PrivilegedExceptionAction<SCADefinitions>() {
+                public SCADefinitions run() throws ContributionReadException {
+                    return (SCADefinitions)urlArtifactProcessor.read(null, uri, definitionsFileUrl);
+                }
+            });
+        } catch (Exception e) {
+            throw new SCADefinitionsProviderException(e);
+        }
+        return scaDefn;
+    }
+
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingFactoryImpl.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingFactoryImpl.java
new file mode 100644
index 0000000000..1b6300aab4
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingFactoryImpl.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.binding.event.impl;
+
+import org.apache.tuscany.sca.assembly.EventBinding;
+import org.apache.tuscany.sca.assembly.EventBindingFactory;
+
+/**
+ * A factory for the Event binding model.
+ * 
+ * @version $$
+ */
+public class EventBindingFactoryImpl implements EventBindingFactory {
+    
+    public EventBindingFactoryImpl (){
+        
+    }
+
+    public EventBinding createEventBinding() {
+        return new EventBindingImpl();
+    }
+    
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingImpl.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingImpl.java
new file mode 100644
index 0000000000..b07651960f
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingImpl.java
@@ -0,0 +1,243 @@
+/*
+ * 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.binding.event.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.EventBinding;
+import org.apache.tuscany.sca.assembly.Extensible;
+import org.apache.tuscany.sca.assembly.OptimizableBinding;
+import org.apache.tuscany.sca.assembly.builder.AutomaticBinding;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentAttachPointType;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySetAttachPoint;
+
+/**
+ * The assembly mode object for an Event binding.
+ * 
+ * @version $$
+ */
+public class EventBindingImpl implements EventBinding, Extensible, PolicySetAttachPoint, OptimizableBinding, AutomaticBinding {
+    private String name;
+    private String uri;
+    private Binding baseBinding;
+    private List<Object> extensions = new ArrayList<Object>();
+    private List<Intent> requiredIntents = new ArrayList<Intent>();
+    private List<PolicySet> policySets = new ArrayList<PolicySet>();
+    private IntentAttachPointType intentAttachPointType;
+    
+    private Component targetComponent;
+    private ComponentService targetComponentService;
+    private Binding targetBinding;
+    private List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>();
+    
+    private boolean isAutomatic = false;
+    
+    public List<PolicySet> getApplicablePolicySets() {
+        return applicablePolicySets;
+    }
+
+    /**
+     * Constructs a new SCA binding.
+     */
+    protected EventBindingImpl() {
+    }
+    
+    // Event Binding operations
+    
+    /**
+     * Setters for the binding name. Defaults to the
+     * name of the service or reference with which the binding is
+     * associated
+     * 
+     * @return the binding name
+     */
+    public String getName() {
+        return name;
+    }
+    
+    /**
+     * Setter for the binding name
+     * 
+     * @param name the binding name
+     */
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Getters for the binding URI. The computed URI for the 
+     * service that the reference is targeting or which the service represents
+     * depending on whether the biding is associated with a reference or
+     * service
+     * 
+     * @return the binding URI
+     */
+    public String getURI() {
+        return uri;
+    }
+
+    /**
+     * Setter for the binding URI
+     * 
+     * @param uri the binding URI
+     */
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+    
+    
+    /**
+     * Getter for the base binding
+     * 
+     * @return base binding
+     */   
+    public Binding getBaseBinding() {
+		return baseBinding;
+	}
+
+    /**
+     * Setter for the base binding
+     * 
+     * @param baseBinding the base binding
+     */
+	public void setBaseBinding(Binding baseBinding) {
+		this.baseBinding = baseBinding;
+	}
+
+	/**
+     * Returns a list of extension objects contained in this model object.
+     * 
+     * @return a list of extension objects container in this model object
+     */
+    public List<Object> getExtensions() {
+        return extensions;
+    }
+    
+    /**
+     * Returns true if the model element is unresolved.
+     * 
+     * @return true if the model element is unresolved.
+     */
+    public boolean isUnresolved() {
+        if (targetComponentService == null){
+            return true;
+        } else {
+            return targetComponentService.isUnresolved();
+        }
+    }
+    
+    /**
+     * Sets whether the model element is unresolved.
+     * 
+     * @param unresolved whether the model element is unresolved
+     */    
+    public void setUnresolved(boolean unresolved) {
+    }
+
+    /**
+     * @see java.lang.Object#clone()
+     */
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+    
+    public List<PolicySet> getPolicySets() {
+        return policySets;
+    }
+    
+    public List<Intent> getRequiredIntents() {
+        return requiredIntents;
+    }
+
+    public IntentAttachPointType getType() {
+        return intentAttachPointType;
+    }
+    
+    public void setType(IntentAttachPointType intentAttachPointType) {
+        this.intentAttachPointType = intentAttachPointType;
+    }
+    
+    // Wireable binding operations
+
+    /**
+     * @return the targetComponent
+     */
+    public Component getTargetComponent() {
+        return targetComponent;
+    }
+
+    /**
+     * @param targetComponent the targetComponent to set
+     */
+    public void setTargetComponent(Component targetComponent) {
+        this.targetComponent = targetComponent;
+    }
+
+    /**
+     * @return the targetComponentService
+     */
+    public ComponentService getTargetComponentService() {
+        return targetComponentService;
+    }
+
+    /**
+     * @param targetComponentService the targetComponentService to set
+     */
+    public void setTargetComponentService(ComponentService targetComponentService) {
+        this.targetComponentService = targetComponentService;
+    }
+
+    /**
+     * @return the targetBinding
+     */
+    public Binding getTargetBinding() {
+        return targetBinding;
+    }
+
+    /**
+     * @param targetBinding the targetBinding to set
+     */
+    public void setTargetBinding(Binding targetBinding) {
+        this.targetBinding = targetBinding;
+    }
+    
+    public void setPolicySets(List<PolicySet> policySets) {
+        this.policySets = policySets; 
+    }
+
+    public void setRequiredIntents(List<Intent> intents) {
+        this.requiredIntents = intents;
+    }
+    
+
+    public void setIsAutomatic(boolean isAutomatic){
+        this.isAutomatic = isAutomatic;
+    }
+    
+    public boolean getIsAutomatic(){
+        return this.isAutomatic;
+    }
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInvoker.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInvoker.java
new file mode 100644
index 0000000000..481f3b2b0a
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingInvoker.java
@@ -0,0 +1,72 @@
+/*
+ * 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.binding.event.impl;
+
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.invocation.DataExchangeSemantics;
+
+/**
+ * TODO: Implement event binding invoker
+ * @version $$
+ */
+public class EventBindingInvoker implements Interceptor, DataExchangeSemantics {
+    private InvocationChain chain;
+    
+    /**
+     * Construct a EventBindingInvoker that delegates to the service invocaiton chain
+     * @param chain
+     */
+    public EventBindingInvoker(InvocationChain chain) {
+        super();
+        this.chain = chain;
+    }
+
+    /**
+     * @see org.apache.tuscany.sca.invocation.Interceptor#getNext()
+     */
+    public Invoker getNext() {
+        return chain.getHeadInvoker();
+    }
+
+    /**
+     * @see org.apache.tuscany.sca.invocation.Interceptor#setNext(org.apache.tuscany.sca.invocation.Invoker)
+     */
+    public void setNext(Invoker next) {
+        // NOOP
+    }
+
+    /**
+     * @see org.apache.tuscany.sca.invocation.Invoker#invoke(org.apache.tuscany.sca.invocation.Message)
+     */
+    public Message invoke(Message msg) {
+        return getNext().invoke(msg);
+    }
+
+    /**
+     * @see org.apache.tuscany.sca.invocation.DataExchangeSemantics#allowsPassByReference()
+     */
+    public boolean allowsPassByReference() {
+        return chain.allowsPassByReference();
+    }
+
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProvider.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProvider.java
new file mode 100644
index 0000000000..bb176eaaff
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProvider.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.binding.event.impl;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+
+/**
+ * The Event Binding provider implementation.
+ * 
+ * @version $$
+ */
+public class EventBindingProvider implements ReferenceBindingProvider {
+    
+    private RuntimeComponentReference reference;
+    
+    public EventBindingProvider(RuntimeComponent component, RuntimeComponentReference reference, EventBindingImpl binding) {
+        this.reference = reference;
+    }
+    
+    public InterfaceContract getBindingInterfaceContract() {
+        return reference.getInterfaceContract();
+    }
+
+    public Invoker createInvoker(Operation operation) {
+        return null;
+    }
+
+    public void start() {
+    }
+
+    public void stop() {
+    }
+    
+    public boolean supportsOneWayInvocation() {
+        return true;
+    }
+
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProviderFactory.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProviderFactory.java
new file mode 100644
index 0000000000..7fc12c84b7
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventBindingProviderFactory.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.binding.event.impl;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.provider.BindingProviderFactory;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+import org.apache.tuscany.sca.provider.ServiceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * The factory for creating Event Binding providers
+ * 
+ * @version $$
+ */
+public class EventBindingProviderFactory implements BindingProviderFactory<EventBindingImpl> {
+    
+    private ExtensionPointRegistry extensionPoints;
+    
+    public EventBindingProviderFactory(ExtensionPointRegistry extensionPoints) {
+        this.extensionPoints = extensionPoints;
+     
+    } 
+    
+    public ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component,
+                                                                   RuntimeComponentReference reference,
+                                                                   EventBindingImpl binding) {
+              
+        return  new EventReferenceBindingProvider(extensionPoints, component, reference, binding);
+    }
+
+    public ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component,
+                                                               RuntimeComponentService service,
+                                                               EventBindingImpl binding) {
+        return new EventServiceBindingProvider(extensionPoints, component, service, binding);
+    }
+
+    public Class<EventBindingImpl> getModelType() {
+        return EventBindingImpl.class;
+    }
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventReferenceBindingProvider.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventReferenceBindingProvider.java
new file mode 100644
index 0000000000..bb09fb5b77
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventReferenceBindingProvider.java
@@ -0,0 +1,97 @@
+/*
+ * 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.binding.event.impl;
+
+import java.util.logging.Logger;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+
+/** 
+ * Event reference binding provider 
+ * 
+ * @version $$
+ */
+public class EventReferenceBindingProvider implements ReferenceBindingProvider {
+
+	@SuppressWarnings("unused")
+    private static final Logger logger = Logger.getLogger(EventReferenceBindingProvider.class.getName());
+
+	@SuppressWarnings("unused")
+    private RuntimeComponent component;
+	@SuppressWarnings("unused")
+    private EventBindingImpl binding;
+    private RuntimeComponentReference reference;
+    private boolean started = false;
+    private ReferenceBindingProvider baseBindingProvider;
+
+
+    public EventReferenceBindingProvider(ExtensionPointRegistry extensionPoints,
+                                              RuntimeComponent component,
+                                              RuntimeComponentReference reference,
+                                              EventBindingImpl binding) {
+        this.component = component;
+        this.reference = reference;
+        this.binding = binding;
+
+        // TODO: Set baseBindingProvider
+    }
+
+
+    public InterfaceContract getBindingInterfaceContract() {
+            if (reference.getReference() != null) {
+                return reference.getReference().getInterfaceContract();
+            } else {
+                return reference.getInterfaceContract();
+            }
+    }
+
+    public boolean supportsOneWayInvocation() {
+        return true;
+    }
+
+
+    public Invoker createInvoker(Operation operation) {
+    	return baseBindingProvider.createInvoker(operation);
+    }
+
+    public void start() {
+        if (started) {
+            return;
+        } else {
+            started = true;
+        }
+    }
+
+    public void stop() {
+        if (!started) {
+            return;
+        } else {
+            started = false;
+        }
+
+    }
+
+}
diff --git a/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventServiceBindingProvider.java b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventServiceBindingProvider.java
new file mode 100644
index 0000000000..593795aae0
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/java/org/apache/tuscany/sca/binding/event/impl/EventServiceBindingProvider.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.binding.event.impl;
+
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.provider.ServiceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * The event service binding provider
+ * 
+ * @version $$
+ */
+public class EventServiceBindingProvider implements ServiceBindingProvider {
+  
+    private RuntimeComponentService service;
+    
+    public EventServiceBindingProvider(ExtensionPointRegistry extensionPoints,
+                                            RuntimeComponent component,
+                                            RuntimeComponentService service,
+                                            EventBindingImpl binding) {
+        this.service = service;
+    }
+
+    public InterfaceContract getBindingInterfaceContract() {
+            if (service.getService() != null) {
+                return service.getService().getInterfaceContract();
+            } else {
+                return service.getInterfaceContract();
+            }
+    }
+
+    public boolean supportsOneWayInvocation() {
+        return true;
+    }
+    
+    public void start() {
+    }
+
+    public void stop() {
+    }
+
+}
diff --git a/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.EventBindingFactory b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.EventBindingFactory
new file mode 100644
index 0000000000..b1a0b12c1d
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.assembly.EventBindingFactory
@@ -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.binding.event.impl.EventBindingFactoryImpl

diff --git a/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory
new file mode 100644
index 0000000000..6102e4210e
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory
@@ -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 binding extension

+org.apache.tuscany.sca.binding.event.impl.EventBindingProviderFactory;model=org.apache.tuscany.sca.binding.event.impl.EventBindingImpl

diff --git a/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider
new file mode 100644
index 0000000000..9a923d1828
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider
@@ -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 SCA Definitions Providers
+org.apache.tuscany.sca.binding.event.EventBindingDefinitionsProvider
\ No newline at end of file
diff --git a/sandbox/event/modules/binding-event/src/main/resources/org/apache/tuscany/sca/binding/sca/definitions.xml b/sandbox/event/modules/binding-event/src/main/resources/org/apache/tuscany/sca/binding/sca/definitions.xml
new file mode 100644
index 0000000000..559994b9f9
--- /dev/null
+++ b/sandbox/event/modules/binding-event/src/main/resources/org/apache/tuscany/sca/binding/sca/definitions.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="ASCII"?>
+<!--
+ * 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.    
+-->
+<sca:definitions xmlns="http://www.osoa.org/xmlns/sca/1.0"
+ 			targetNamespace="http://www.osoa.org/xmlns/sca/1.0"
+ 			xmlns:sca="http://www.osoa.org/xmlns/sca/1.0"
+ 			xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.0">
+ 			
+	<sca:bindingType type="sca:binding.event"  mayProvide="" alwaysProvides=""/>	 		
+ </sca:definitions>
\ No newline at end of file