Branch for 1.4

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@722428 13f79535-47bb-0310-9956-ffa450edef68

13 files changed, 799 insertions, 0 deletions

diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementation.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementation.java
new file mode 100644
index 0000000000..7c2f5d236f
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementation.java
@@ -0,0 +1,65 @@
+/*
+ * 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 pojo;
+
+import java.lang.reflect.Method;
+import java.util.Map;
+
+import org.apache.tuscany.sca.assembly.Implementation;
+
+
+/**
+ * Represents a POJO implementation in an SCA assembly.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface POJOImplementation extends Implementation {
+    
+    /**
+     * Returns the POJO class name
+     * @return
+     */
+    public String getPOJOName();
+
+    /**
+     * Sets the POJO class name
+     * @param pojoName
+     */
+    public void setPOJOName(String pojoName);
+    
+    /**
+     * Returns the POJO class.
+     * @return
+     */
+    public Class<?> getPOJOClass();
+    
+    /**
+     * Sets the POJO class.
+     * @param pojoClass
+     */
+    public void setPOJOClass(Class<?> pojoClass);
+  
+    /**
+     * Returns the POJO's methods.
+     * @return
+     */
+    public Map<String, Method> getMethods();
+
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementationFactory.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementationFactory.java
new file mode 100644
index 0000000000..bbcfb3d0dc
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/POJOImplementationFactory.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 pojo;
+
+
+/**
+ * Factory for the POJO implementation model. 
+ *
+ * @version $Rev$ $Date$
+ */
+public interface POJOImplementationFactory {
+
+    /**
+     * Creates a new POJO implementation model object.
+     * @return a new POJO implementation model object
+     */
+    POJOImplementation createPOJOImplementation();
+    
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationFactoryImpl.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationFactoryImpl.java
new file mode 100644
index 0000000000..0dad270a6c
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationFactoryImpl.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 pojo.impl;
+
+import pojo.POJOImplementation;
+import pojo.POJOImplementationFactory;
+
+/**
+ * A factory for the POJO implementation model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class POJOImplementationFactoryImpl implements POJOImplementationFactory {
+
+    public POJOImplementation createPOJOImplementation() {
+        return new POJOImplementationImpl();
+    }
+
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationImpl.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationImpl.java
new file mode 100644
index 0000000000..f2d6871039
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationImpl.java
@@ -0,0 +1,155 @@
+/*
+ * 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 pojo.impl;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+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 pojo.POJOImplementation;
+
+
+/**
+ * Represents a POJO implementation in an SCA assembly.
+ *
+ * @version $Rev$ $Date$
+ */
+class POJOImplementationImpl implements POJOImplementation {
+    
+    private String pojoName;
+    private Class<?> pojoClass;
+    private String uri;
+    private Map<String, Method> methods;
+    private List<Service> services = new ArrayList<Service>();
+    private List<Reference> references = new ArrayList<Reference>();
+    private List<Property> properties = new ArrayList<Property>();
+    private boolean unresolved;
+
+    POJOImplementationImpl() {
+    }
+    
+    /**
+     * Returns the POJO class name
+     * @return
+     */
+    public String getPOJOName() {
+        return pojoName;
+    }
+
+    /**
+     * Sets the POJO class name
+     * @param pojoName
+     */
+    public void setPOJOName(String pojoName) {
+        this.pojoName = pojoName;
+        setURI(pojoName.replace('.', '/'));
+    }
+    
+    /**
+     * Returns the POJO class.
+     * @return
+     */
+    public Class<?> getPOJOClass() {
+        return pojoClass;
+    }
+    
+    /**
+     * Sets the POJO class.
+     * @param pojoClass
+     */
+    public void setPOJOClass(Class<?> pojoClass) {
+        this.pojoClass = pojoClass;
+        setPOJOName(pojoClass.getName());
+        
+        // Index the POJO's methods
+        methods = new HashMap<String, Method>();
+        Method[] m = pojoClass.getMethods();
+        for (int i = 0; i < m.length; i++) {
+            methods.put(m[i].getName(), m[i]);
+        }
+    }
+  
+    /**
+     * Returns the POJO's methods.
+     * @return
+     */
+    public Map<String, Method> getMethods() {
+        return methods;
+    }
+
+    public ConstrainingType getConstrainingType() {
+        // The sample POJO implementation does not support constrainingTypes
+        return null;
+    }
+
+    public List<Property> getProperties() {
+        return properties;
+    }
+
+    public List<Service> getServices() {
+        return services;
+    }
+    
+    public List<Reference> getReferences() {
+        return references;
+    }
+
+    public String getURI() {
+        return uri;
+    }
+
+    public void setConstrainingType(ConstrainingType constrainingType) {
+        // The sample POJO implementation does not support constrainingTypes
+    }
+
+    public void setURI(String uri) {
+        this.uri = uri;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+        this.unresolved = unresolved;
+    }
+
+    @Override
+    public int hashCode() {
+        return uri.hashCode();
+    }
+    
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof POJOImplementationImpl) {
+            return ((POJOImplementationImpl)obj).getURI().equals(uri);
+        } else {
+            return false;
+        }
+    }
+
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationProcessor.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationProcessor.java
new file mode 100644
index 0000000000..44a2cc0aa8
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/impl/POJOImplementationProcessor.java
@@ -0,0 +1,174 @@
+/*
+ * 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 pojo.impl;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.AssemblyFactory;
+import org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.assembly.xml.PolicyAttachPointProcessor;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+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 org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.policy.PolicyFactory;
+
+import pojo.POJOImplementation;
+import pojo.POJOImplementationFactory;
+
+/**
+ * Implements a STAX based artifact processor for POJO implementations.
+ * 
+ * The artifact processor is responsible for processing <implementation.pojo>
+ * elements in SCA assembly XML composite files and populating the POJO
+ * implementation model, resolving its references to other artifacts in the SCA
+ * contribution, and optionally write the model back to SCA assembly XML. 
+ */
+public class POJOImplementationProcessor implements StAXArtifactProcessor<POJOImplementation> {
+    private static final QName IMPLEMENTATION_POJO = new QName("http://pojo", "implementation.pojo");
+    
+    private AssemblyFactory assemblyFactory;
+    private JavaInterfaceFactory javaFactory;
+    private POJOImplementationFactory pojoImplementationFactory;
+    private PolicyFactory policyFactory;
+    private PolicyAttachPointProcessor policyProcessor;
+    
+    public POJOImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
+        
+        // Get the assembly and Java interface factories as we'll need them to
+        // create model objects 
+        assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
+        javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
+        policyFactory = modelFactories.getFactory(PolicyFactory.class);
+        pojoImplementationFactory = modelFactories.getFactory(POJOImplementationFactory.class);
+        policyProcessor = new PolicyAttachPointProcessor(policyFactory);
+    }
+
+    public QName getArtifactType() {
+        // Returns the qname of the XML element processed by this processor
+        return IMPLEMENTATION_POJO;
+    }
+
+    public Class<POJOImplementation> getModelType() {
+        // Returns the type of model processed by this processor
+        return POJOImplementation.class;
+    }
+
+    public POJOImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+    
+        // Read an <implementation.pojo> element
+        POJOImplementation implementation = pojoImplementationFactory.createPOJOImplementation();
+        
+        // Read policies
+        policyProcessor.readPolicies(implementation, reader);
+        
+        // Read the POJO class attribute.
+        String className = reader.getAttributeValue(null, "class");
+        implementation.setPOJOName(className);
+        
+        // Mark the POJO model unresolved to track the fact that it's not
+        // completely initialized, its class is not loaded yet and services
+        // and references not initialized either
+        implementation.setUnresolved(true);
+        
+        // Skip to end element
+        while (reader.hasNext()) {
+            if (reader.next() == END_ELEMENT && IMPLEMENTATION_POJO.equals(reader.getName())) {
+                break;
+            }
+        }
+        
+        return implementation;
+    }
+
+    public void resolve(POJOImplementation implementation, ModelResolver resolver) throws ContributionResolveException {
+        
+        // Resolve the POJO implementation
+        
+        // First resolve its class
+        ClassReference classReference = new ClassReference(implementation.getPOJOName());
+        classReference = resolver.resolveModel(ClassReference.class, classReference);
+        Class<?> pojoClass = classReference.getJavaClass();
+        if (pojoClass == null) {
+            throw new ContributionResolveException("Class could not be resolved: " + implementation.getPOJOName());
+        }
+        implementation.setPOJOClass(pojoClass);
+        
+        // Check to see if we have a .componentType file describing the POJO class
+        ComponentType componentType = assemblyFactory.createComponentType();
+        componentType.setUnresolved(true);
+        componentType.setURI(implementation.getURI() + ".componentType");
+        componentType = resolver.resolveModel(ComponentType.class, componentType);
+        if (!componentType.isUnresolved()) {
+            
+            // We have a component type description, merge it into the POJO model
+            implementation.getServices().addAll(componentType.getServices());
+            implementation.getReferences().addAll(componentType.getReferences());
+            implementation.getProperties().addAll(componentType.getProperties());
+            
+        } else {
+            
+            // We have no component type description, simply introspect the POJO and
+            // create a single Service for it
+            Service service = assemblyFactory.createService();
+            service.setName(pojoClass.getSimpleName());
+            JavaInterface javaInterface;
+            try {
+                javaInterface = javaFactory.createJavaInterface(pojoClass);
+            } catch (InvalidInterfaceException e) {
+                throw new ContributionResolveException(e);
+            }
+            JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
+            interfaceContract.setInterface(javaInterface);
+            service.setInterfaceContract(interfaceContract);
+            implementation.getServices().add(service);
+        }
+        
+        // Mark the implementation resolved now
+        implementation.setUnresolved(false);
+    }
+
+    public void write(POJOImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+        
+        // Write <implementation.pojo> element
+        policyProcessor.writePolicyPrefixes(implementation, writer);
+        writer.writeStartElement(IMPLEMENTATION_POJO.getNamespaceURI(), IMPLEMENTATION_POJO.getLocalPart());
+        policyProcessor.writePolicyAttributes(implementation, writer);
+        
+        if (implementation.getPOJOName() != null) {
+            writer.writeAttribute("class", implementation.getPOJOName());
+        }
+        
+        writer.writeEndElement();
+    }
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationInvoker.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationInvoker.java
new file mode 100644
index 0000000000..87333c61f6
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationInvoker.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 pojo.provider;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * Implements an invoker for POJO 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 operation invocations to the
+ * corresponding methods on the POJO implementation class using Java reflection.
+ * 
+ * Depending on the type of implementation being handled, more sophisticated invokers can
+ * use other techniques to delegate the invocation to the implementation artifact directly, call a
+ * runtime engine like a BPEL engine or an XQuery engine (this is what the Tuscany 
+ * implementation-bpel and implementation-xquery extensions do) or just completely handle the
+ * invocation in the invoker itself if the implementation has a fixed behavior for example.
+ */
+class POJOImplementationInvoker implements Invoker {
+
+    private Object pojoInstance;
+    private Method method;
+    
+    POJOImplementationInvoker(Object pojoInstance, Operation operation, Method method) {
+        this.pojoInstance = pojoInstance;
+        this.method = method;
+    }
+    
+    public Message invoke(Message msg) {
+        try {
+            msg.setBody(method.invoke(pojoInstance, (Object[])msg.getBody()));
+        } catch (InvocationTargetException e) {
+            msg.setFaultBody(e);
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+        return msg;
+    }
+    
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProvider.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProvider.java
new file mode 100644
index 0000000000..73a0d22493
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProvider.java
@@ -0,0 +1,106 @@
+/*
+ * 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 pojo.provider;
+
+import java.lang.reflect.Method;
+
+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 org.osoa.sca.ServiceRuntimeException;
+
+import pojo.POJOImplementation;
+
+/**
+ * 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. In this example we are using that opportunity to call init and destroy methods
+ * on the POJO instance if these methods exist.
+ *
+ * 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.
+ * 
+ * For example here we are looking up the Java method corresponding to the service operation
+ * at passing it to the invoker constructor. This way the invoker won't have to lookup the Java
+ * method on each invocation.  
+ */
+class POJOImplementationProvider implements ImplementationProvider {
+    
+    private POJOImplementation implementation;
+    private Object pojoInstance;
+
+    /**
+     * Constructs a new CRUD implementation.
+     */
+    POJOImplementationProvider(RuntimeComponent component, POJOImplementation implementation) {
+        this.implementation = implementation;
+        
+        // Create a new instance of the POJO
+        try {
+            pojoInstance = implementation.getPOJOClass().newInstance();
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    public void start() {
+        try {
+            // Invoke the POJO's init method
+            Method initMethod = implementation.getMethods().get("init");
+            if (initMethod != null) {
+                initMethod.invoke(pojoInstance);
+            }
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    public void stop() {
+        try {
+            // Invoke the POJO's destroy method
+            Method destroyMethod = implementation.getMethods().get("destroy");
+            if (destroyMethod != null) {
+                destroyMethod.invoke(pojoInstance);
+            }
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        } finally {
+            pojoInstance = null;
+        }
+    }
+    
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        Method method = implementation.getMethods().get(operation.getName()); 
+        POJOImplementationInvoker invoker = new POJOImplementationInvoker(pojoInstance, operation, method);
+        return invoker;
+    }
+    
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProviderFactory.java b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProviderFactory.java
new file mode 100644
index 0000000000..22f2be09e9
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/java/pojo/provider/POJOImplementationProviderFactory.java
@@ -0,0 +1,45 @@
+/*
+ * 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 pojo.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 pojo.POJOImplementation;
+
+/**
+ * A factory for POJO implementation providers.
+ */
+public class POJOImplementationProviderFactory implements ImplementationProviderFactory<POJOImplementation> {
+    
+    public POJOImplementationProviderFactory(ExtensionPointRegistry registry) {
+    }
+
+    public Class<POJOImplementation> getModelType() {
+        // Returns the type of model processed by this processor
+        return POJOImplementation.class;
+    }
+
+    public ImplementationProvider createImplementationProvider(RuntimeComponent component, POJOImplementation implementation) {
+        return new POJOImplementationProvider(component, implementation);
+    }
+    
+}
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor
new file mode 100644
index 0000000000..8337e81c5f
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-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
+pojo.impl.POJOImplementationProcessor;qname=http://pojo#implementation.pojo,model=pojo.POJOImplementation,factory=pojo.POJOImplementationFactory
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.ValidationSchema b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.processor.ValidationSchema
new file mode 100644
index 0000000000..64dd230a15
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-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-pojo.xsd
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.ImplementationProviderFactory
new file mode 100644
index 0000000000..b30ea3b9cf
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-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

+pojo.provider.POJOImplementationProviderFactory;model=pojo.POJOImplementation

diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/pojo.POJOImplementationFactory b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/pojo.POJOImplementationFactory
new file mode 100644
index 0000000000..075af98240
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/META-INF/services/pojo.POJOImplementationFactory
@@ -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 implementation model factory
+pojo.impl.POJOImplementationFactoryImpl
diff --git a/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/sample-implementation-pojo.xsd b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/sample-implementation-pojo.xsd
new file mode 100644
index 0000000000..c9d170770b
--- /dev/null
+++ b/branches/sca-java-1.4/samples/implementation-pojo-extension/src/main/resources/sample-implementation-pojo.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://pojo" 
+    xmlns:sca="http://www.osoa.org/xmlns/sca/1.0"
+    xmlns:p="http://pojo" 
+    elementFormDefault="qualified">
+
+    <import namespace="http://www.osoa.org/xmlns/sca/1.0"/>
+
+    <element name="implementation.pojo" type="p:POJOImplementation"/>
+    	
+    <complexType name="POJOImplementation">
+        <complexContent>
+            <extension base="sca:Implementation">
+                <attribute name="class" type="NCName" use="required"/>
+            </extension>
+        </complexContent>
+    </complexType>
+
+</schema>