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Diffstat (limited to 'sca-java-2.x/tags/2.0-Beta2-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingLocalInvocationInterceptor.java')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta2-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingLocalInvocationInterceptor.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta2-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingLocalInvocationInterceptor.java b/sca-java-2.x/tags/2.0-Beta2-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingLocalInvocationInterceptor.java new file mode 100644 index 0000000000..45933bde63 --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta2-RC1/modules/binding-sca-runtime/src/main/java/org/apache/tuscany/sca/binding/sca/provider/SCABindingLocalInvocationInterceptor.java @@ -0,0 +1,109 @@ +/* + * 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.sca.provider; + +import java.util.logging.Level; +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 SCABindingLocalInvocationInterceptor extends InterceptorAsyncImpl { + private static final Logger logger = Logger.getLogger(SCABindingLocalInvocationInterceptor.class.getName()); + + private Invoker next; + + private boolean skipPrevious; + + public SCABindingLocalInvocationInterceptor() { + 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 |