From 132aa8a77685ec92bc90c03f987650d275a7b639 Mon Sep 17 00:00:00 2001 From: lresende Date: Mon, 30 Sep 2013 06:59:11 +0000 Subject: 2.0.1 RC1 release tag git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1527464 13f79535-47bb-0310-9956-ffa450edef68 --- .../invocation/impl/AsyncResponseHandlerImpl.java | 197 +++++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 sca-java-2.x/tags/2.0.1-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/impl/AsyncResponseHandlerImpl.java (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/impl/AsyncResponseHandlerImpl.java') 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 new file mode 100644 index 0000000000..9de1809200 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/impl/AsyncResponseHandlerImpl.java @@ -0,0 +1,197 @@ +/* + * 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 + */ +public class AsyncResponseHandlerImpl implements AsyncResponseHandler, + 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 getOperations() { + return null; + } + + public QName getType() { + return null; + } + + public List getProperties() { + return null; + } + + public Property getProperty(String name) { + return null; + } + + public Reference getReference(String name) { + return null; + } + + public List getReferences() { + return null; + } + + public Service getService(String name) { + return null; + } + + public List 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 getPolicySets() { + return null; + } + + public List 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 -- cgit v1.2.3