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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;
 
 
A base class that holds the mechanics for representing chained interceptors and for driving processing up and down the chain.
 
 public abstract class InterceptorAsyncImpl implements InterceptorAsync {
     
     protected Invoker next;
     protected InvokerAsyncResponse previous;
     
     public Invoker getNext() {
         return (Invoker);
     }
     
     public void setNext(Invoker next) {
         this. = next;
     }
     
     public InvokerAsyncResponse getPrevious() {
         return ;
     }
     
     public void setPrevious(InvokerAsyncResponse previous) {
         this. = previous;
     }
     
     public Message invoke(Message msg) {
         msg = processRequest(msg);
         Message resultMsg = getNext().invoke(msg);
         resultMsg = processResponse(resultMsg);
         return resultMsg;
     }
     
     public void invokeAsyncRequest(Message msgthrows Throwable {
     	try
 	        msg = processRequest(msg);
 	        InvokerAsyncRequest theNext = (InvokerAsyncRequest)getNext();
 	        iftheNext != null ) theNext.invokeAsyncRequest(msg);
 	        postProcessRequest(msg);
     	} catch (Throwable e) {
     		postProcessRequest(msge);
     	} // end try
     } // end method invokeAsyncRequest
     
     public void invokeAsyncResponse(Message msg) {
         msg = processResponse(msg);
         InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();
         if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);
     } // end method invokeAsyncResponse
 
    
Basic null version of postProcessRequest - subclasses should override for any required real processing
 
     public Message postProcessRequest(Message msg) {
     	// Default processing is to do nothing
     	return msg;
     } // end method postProcessRequest
 
    
Basic null version of postProcessRequest - subclasses should override for any required real processing

 
     public Message postProcessRequest(Message msgThrowable ethrows Throwable {
     	// Default processing is to rethrow the exception
     	throw e;
     } // end method postProcessRequest
 
    
    
A testing method while I use the local SCA binding wire to look at how the async response path works. This allows me to detect the point where the reference wire turns into the service with in the optimized case

Returns:
    public boolean isLocalSCABIndingInvoker() {
        return false;
    }
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