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diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/impl/AsyncResponseHandlerImpl.java b/sca-java-2.x/tags/2.0.1-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/impl/AsyncResponseHandlerImpl.java
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+/*
+ * 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.core.invocation.impl;
+
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Implementation;
+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.core.invocation.AsyncFaultWrapper;
+import org.apache.tuscany.sca.core.invocation.AsyncResponseHandler;
+import org.apache.tuscany.sca.core.invocation.Constants;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.policy.ExtensionType;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * A class intended to form the final link in the chain calling into a Future which represents
+ * the response to an asynchronous service invocation
+ *
+ * Most methods are dummies, required to fulfil the contracts for ImplementationProvider, Implementation
+ * and Invoker, since this class collapses together the functions of these separate interfaces, due to its
+ * specialized nature, where most of the function will never be used.
+ *
+ * The class acts as the implementation object that terminates the chain - and also as the provider of the implementation.
+ * The class accepts Future objects which represent individual invocations of forward operations on the async service
+ * and expects that the responses it handles as invocations will carry the unique ID of one of the Future objects in the
+ * message header. On receipt of each message, the class seeks out the Future with that unique ID and completes the future
+ * either with a response message or with a Fault.
+ *
+ * @param <V>
+ */
+public class AsyncResponseHandlerImpl<V> implements AsyncResponseHandler<V>,
+ ImplementationProvider, Implementation, Invoker {
+
+ private ConcurrentHashMap< String, AsyncInvocationFutureImpl<?> > table =
+ new ConcurrentHashMap< String, AsyncInvocationFutureImpl<?> >();
+
+ /**
+ * This class is its own invoker...
+ */
+ public Invoker createInvoker(RuntimeComponentService service,
+ Operation operation) {
+ return this;
+ }
+
+ /**
+ * Add a future to this response handler
+ * @param future - the future
+ */
+ public void addFuture( AsyncInvocationFutureImpl<?> future ) {
+ // The Future is stored in the table indexed by its unique ID
+ table.put(future.getUniqueID(), future);
+ } // end method addFuture
+
+ public boolean supportsOneWayInvocation() {
+ return true;
+ }
+
+ public void start() {}
+
+ public void stop() {}
+
+ public List<Operation> getOperations() {
+ return null;
+ }
+
+ public QName getType() {
+ return null;
+ }
+
+ public List<Property> getProperties() {
+ return null;
+ }
+
+ public Property getProperty(String name) {
+ return null;
+ }
+
+ public Reference getReference(String name) {
+ return null;
+ }
+
+ public List<Reference> getReferences() {
+ return null;
+ }
+
+ public Service getService(String name) {
+ return null;
+ }
+
+ public List<Service> getServices() {
+ return null;
+ }
+
+ public String getURI() {
+ return null;
+ }
+
+ public void setURI(String uri) {}
+
+ public boolean isUnresolved() {
+ return false;
+ }
+
+ public void setUnresolved(boolean unresolved) {}
+
+ public ExtensionType getExtensionType() {
+ return null;
+ }
+
+ public List<PolicySet> getPolicySets() {
+ return null;
+ }
+
+ public List<Intent> getRequiredIntents() {
+ return null;
+ }
+
+ public void setExtensionType(ExtensionType type) {}
+
+ public void setWrappedFault(AsyncFaultWrapper e) {}
+
+ public void setFault(Throwable e) {}
+
+ public void setResponse(V res) { }
+
+ /**
+ * Method which is the termination for the invocation chain from the callback endpoint
+ * @param msg - the Tuscany message containing the response from the async service invocation
+ * which is either the Response message or an exception of some kind
+ */
+ @SuppressWarnings({ "unchecked", "rawtypes" })
+ public Message invoke(Message msg) {
+ // Get the unique ID from the RELATES_TO message header
+ String idValue = (String)msg.getHeaders().get(Constants.RELATES_TO);
+
+ if( idValue == null ) {
+ System.out.println( "Async message ID not found ");
+ } else {
+ // Fetch the Future with that Unique ID
+ AsyncInvocationFutureImpl future = table.get(idValue);
+ if( future == null ) {
+ System.out.println("Future not found for id: " + idValue);
+ } else {
+ // Complete the Future with a Response message
+ Object payload = msg.getBody();
+ Object response;
+ if( payload == null ) {
+ System.out.println("Returned response message was null");
+ } else {
+ if (payload.getClass().isArray()) {
+ response = ((Object[])payload)[0];
+ } else {
+ response = payload;
+ } // end if
+ if( response.getClass().equals(AsyncFaultWrapper.class)) {
+ future.setWrappedFault((AsyncFaultWrapper) response );
+ } else {
+ future.setResponse(response);
+ } // end if
+ } // end if
+ } // end if
+ } // end if
+
+ // Prepare an empty response message
+ msg.setBody(null);
+ return msg;
+ } // end method invoke
+
+} // end class