TUSCANY-3884 - Convert the default binding to delegate for local calls as well as remote calls. Means that the binding is more consistent in it's layout and the delegation selection logic is more cleanly separated from the code that handles passing messages.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1145118 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 167 insertions, 0 deletions

diff --git a/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvoker.java b/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvoker.java
new file mode 100644
index 0000000000..a2eb53d5bb
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvoker.java
@@ -0,0 +1,167 @@
+/*

+ * 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.local;

+

+import org.apache.tuscany.sca.core.ExtensionPointRegistry;

+import org.apache.tuscany.sca.core.FactoryExtensionPoint;

+import org.apache.tuscany.sca.core.invocation.AsyncResponseInvoker;

+import org.apache.tuscany.sca.core.invocation.InterceptorAsyncImpl;

+import org.apache.tuscany.sca.databinding.Mediator;

+import org.apache.tuscany.sca.interfacedef.Operation;

+import org.apache.tuscany.sca.invocation.InvocationChain;

+import org.apache.tuscany.sca.invocation.Invoker;

+import org.apache.tuscany.sca.invocation.InvokerAsyncRequest;

+import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;

+import org.apache.tuscany.sca.invocation.Message;

+import org.apache.tuscany.sca.invocation.MessageFactory;

+import org.apache.tuscany.sca.invocation.Phase;

+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;

+import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;

+

+

+/**

+ * @version $Rev: 1057653 $ $Date: 2011-01-11 09:18:49 -0500 (Tue, 11 Jan 2011) $

+ */

+public class LocalSCABindingInvoker extends InterceptorAsyncImpl {

+    private InvocationChain chain;

+    private Mediator mediator;

+    private Operation sourceOperation;

+    private Operation targetOperation;

+    private boolean passByValue;

+    private RuntimeEndpointReference epr;

+    private RuntimeEndpoint ep;

+    private ExtensionPointRegistry registry;

+

+    /**

+     * Construct a SCABindingInvoker that delegates to the service invocation chain

+     */

+    public LocalSCABindingInvoker(InvocationChain chain, Operation sourceOperation, Mediator mediator, 

+    		boolean passByValue, RuntimeEndpointReference epr, ExtensionPointRegistry registry) {

+        super();

+        this.chain = chain;

+        this.mediator = mediator;

+        this.sourceOperation = sourceOperation;

+        this.targetOperation = chain.getTargetOperation();

+        this.passByValue = passByValue;

+        this.epr = epr;

+        this.ep = (RuntimeEndpoint)epr.getTargetEndpoint();

+        this.registry = registry;

+    }

+

+    /**

+     * @see org.apache.tuscany.sca.invocation.Interceptor#getNext()

+     */

+    public Invoker getNext() {

+        return chain.getHeadInvoker(Phase.SERVICE_POLICY);

+    }

+

+    /**

+     * @see org.apache.tuscany.sca.invocation.Interceptor#setNext(org.apache.tuscany.sca.invocation.Invoker)

+     */

+    public void setNext(Invoker next) {

+        // NOOP

+    }

+    

+    public Message processRequest(Message msg){

+        if (passByValue) {

+            msg.setBody(mediator.copyInput(msg.getBody(), sourceOperation, targetOperation));

+        } // end if

+        

+        ep.getInvocationChains();

+        if ( !ep.getCallbackEndpointReferences().isEmpty() ) {

+            RuntimeEndpointReference asyncEPR = (RuntimeEndpointReference) ep.getCallbackEndpointReferences().get(0);

+            // Place a link to the callback EPR into the message headers...

+            msg.getHeaders().put("ASYNC_CALLBACK", asyncEPR );

+        } // end if

+        

+        if( ep.isAsyncInvocation() ) {

+            // Get the message ID 

+            String msgID = (String)msg.getHeaders().get("MESSAGE_ID");

+            

+            String operationName = msg.getOperation().getName();

+            

+            // Create a response invoker and add it to the message headers

+            AsyncResponseInvoker<RuntimeEndpointReference> respInvoker =            	

+            	new AsyncResponseInvoker<RuntimeEndpointReference>(ep, null, epr, msgID, operationName, getMessageFactory());

+            respInvoker.setBindingType("SCA_LOCAL");

+            msg.getHeaders().put("ASYNC_RESPONSE_INVOKER", respInvoker);

+        } // end if

+        

+        return msg;

+    } // end method processRequest

+    

+    /**

+     * Regular (sync) processing of response message

+     */

+    public Message processResponse(Message msg){

+        if (passByValue) {

+            // Note source and target operation swapped so result is in source class loader

+            if (msg.isFault()) {

+                msg.setFaultBody(mediator.copyFault(msg.getBody(), sourceOperation, targetOperation));

+            } else {

+                if (sourceOperation.getOutputType() != null) {

+                    msg.setBody(mediator.copyOutput(msg.getBody(), sourceOperation, targetOperation));

+                } // end if

+            } // end if

+        } // end if

+        

+        return msg;

+    } // end method processResponse

+    

+    public void invokeAsyncRequest(Message msg) throws Throwable {

+    	try{ 

+	        msg = processRequest(msg);

+	        InvokerAsyncRequest theNext = (InvokerAsyncRequest)getNext();

+	        if( theNext != null ) theNext.invokeAsyncRequest(msg);

+	        postProcessRequest(msg);

+    	} catch (Throwable e) {

+    		postProcessRequest(msg, e);

+    	} // end try

+    } // end method invokeAsyncRequest

+    

+    public void invokeAsyncResponse(Message msg) {

+        msg = processResponse(msg);

+        

+        // Handle async response Relates_To message ID value

+        @SuppressWarnings("unchecked")

+		AsyncResponseInvoker<RuntimeEndpointReference> respInvoker = 

+        	(AsyncResponseInvoker<RuntimeEndpointReference>)msg.getHeaders().get("ASYNC_RESPONSE_INVOKER");

+        // TODO - this deals with the Local case only - not distributed

+        if( respInvoker != null && "SCA_LOCAL".equals(respInvoker.getBindingType()) ) {

+	        RuntimeEndpointReference responseEPR = respInvoker.getResponseTargetAddress();

+	        msg.setFrom(responseEPR);

+        	String msgID = respInvoker.getRelatesToMsgID();

+	        msg.getHeaders().put("RELATES_TO", msgID);

+        } // end if

+        

+        InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();

+        if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);

+    } // end method invokeAsyncResponse

+    

+    public boolean isLocalSCABIndingInvoker() {

+        return true;

+    }

+    

+	private MessageFactory getMessageFactory() {

+		FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);

+		return modelFactories.getFactory(MessageFactory.class);

+	} // end method getMessageFactory

+

+}