1 files changed, 108 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvocationInterceptor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvocationInterceptor.java
new file mode 100644
index 0000000000..36ac93a5be
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/local/LocalSCABindingInvocationInterceptor.java
@@ -0,0 +1,108 @@
+/*
+ * 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 java.util.logging.Logger;
+
+import org.apache.tuscany.sca.core.invocation.AsyncResponseInvoker;
+import org.apache.tuscany.sca.core.invocation.InterceptorAsyncImpl;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
+
+/**
+ * Interceptor used by the SCA Binding on the service side chain to provide a mechanism for optimising
+ * invocations when the reference and the service involved are both in the same JVM, and thus the need
+ * to use a transport of any kind is unnecessary.
+ * 
+ */
+public class LocalSCABindingInvocationInterceptor extends InterceptorAsyncImpl {
+    private static final Logger logger = Logger.getLogger(LocalSCABindingInvocationInterceptor.class.getName());
+      
+    private Invoker next;
+
+	private boolean skipPrevious;    
+    
+    public LocalSCABindingInvocationInterceptor() {
+        super();
+    } // end constructor
+    
+    public Message invoke(Message msg) {
+        return next.invoke(msg);
+    } // end method invoke   
+    
+    public Invoker getNext() {
+        return next;
+    } // end method getNext
+
+    public void setNext(Invoker next) {
+        this.next = next;
+    } // end method setNext
+
+    /**
+     * Process request method is simply a passthrough
+     */
+	public Message processRequest(Message msg) {
+		return msg ;
+	} // end method processRequest
+
+	
+	/**
+	 * Handle an async response
+	 * - deals with the local SCA binding case only (at present)
+	 * - in this case, extract the async response invoker from the message header and call the EPR
+	 *   that is present in the invoker, which is in fact the local EPR from which the original forward
+	 *   request came
+	 */
+    public void invokeAsyncResponse(Message msg) {
+        @SuppressWarnings("unchecked")
+		AsyncResponseInvoker<?> respInvoker = 
+        	(AsyncResponseInvoker<?>)msg.getHeaders().get("ASYNC_RESPONSE_INVOKER");
+        if( respInvoker != null && "SCA_LOCAL".equals(respInvoker.getBindingType()) ) {
+        	// Handle the locally optimised case
+	        RuntimeEndpointReference responseEPR = (RuntimeEndpointReference)respInvoker.getResponseTargetAddress();
+	        msg.setFrom(responseEPR);
+	        // Handle async response Relates_To message ID value
+        	String msgID = respInvoker.getRelatesToMsgID();
+	        msg.getHeaders().put("RELATES_TO", msgID);
+	        
+	        // Call the processing on the reference chain directly
+	        responseEPR.invokeAsyncResponse(msg);
+	        
+	        // Prevent the response being processed by the rest of the service chain
+	        return;
+        } else {
+        	// Carry on processing the response by the rest of the service chain
+            InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();
+            if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);
+            return;
+        } // end if
+
+    } // end method invokeAsyncResponse
+
+	/**
+	 * processResponse is not called during async response handling (all handled by invokeAsyncResponse)
+	 * - this version is a dummy which does nothing.
+	 */
+	public Message processResponse(Message msg) {
+		return msg;
+	} // end method processResponse
+   
+} // end class