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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   * 
   * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
   * 
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   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License. You can obtain
  * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
  * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
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  * as provided by Sun in the GPL Version 2 section of the License file that
  * accompanied this code.  If applicable, add the following below the License
  * Header, with the fields enclosed by brackets [] replaced by your own
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 package com.sun.enterprise.web.connector.grizzly;
 
This task execute and then notify its listener, which usualy execute on their own thread. The task perform the same operation as its parent, but the attached ProcessorTask execute on its own thread.

Author(s):
Jean-Francois Arcand
 
 public class AsyncReadTask extends DefaultReadTask {
     
     
     public AsyncReadTask(){
         super();
     }
 
     // ----------------------------------------------------------------------//
     
     @Override
     public void initialize(StreamAlgorithm algorithm,
                       boolean useDirectByteBufferboolean useByteBufferView){
         super.initialize(algorithm,useDirectByteBuffer,useByteBufferView);
          = algorithm.allocate(useDirectByteBuffer,
                 useByteBufferView,.getBufferSize());
     }
    
    
    
Read data from the socket and process it using this thread, and only if the StreamAlgorith stategy determine no more bytes are are needed.
 
     @Override
     public void doTask() throws IOException {
         doTask();
     }
    
    
    
Manage the SelectionKey
 
     @Override
     protected void manageKeepAlive(boolean keepAlive,int count
             Exception exception){         
 
         // The key is invalid when the Task has been cancelled.
         if ( count <= 0 || exception != null){
             if ( exception != null){
                 // Make sure we have detached the processorTask
                 detachProcessor();
                 if (SelectorThread.logger().isLoggable(.)){
                     SelectorThread.logger().log
                        (.
                            "SocketChannel Read Exception:",exception);
                 }
             }
             terminate(false);
         }
     }


    
Execute the ProcessorTask

Returns:
false if the request wasn't fully read by the channel. so we need to respin the key on the Selector.
    @Override
    public boolean executeProcessorTask() throws IOException{                  
        boolean registerKey = false;
        
        if (SelectorThread.logger().isLoggable(.))
            SelectorThread.logger().log(.,"executeProcessorTask");
        
        if (  .getHandler() != null && .getHandler()
                .handle(null.) == . ){
            return true;
        }
        
        // Get a processor task. If the processorTask != null, that means we
        // failed to load all the bytes in a single channel.read().
        if ( == null){
        } else {
            // When spawnProcessorTask is true, we must reconfigure the 
            // ProcessorTask
            configureProcessorTask();
        }        
        
        if ( == null){
             = new TaskContext();
             = new TaskEvent<TaskContext>();
        }
   
        // Call the listener and execute the task on it's own pipeline.
        .setStatus(.);        
        .attach();
        fireTaskEvent(); 
        return false;
    }
    
    
    
Clear the current state and make this object ready for another request.
    @Override
    public void recycle(){
         = .postParse();   
        .clear(); 
        .recycle();
        .recycle();
         = null;
        .setSelectionKey(null);                             
    }
    

    
Set the underlying ByteBuffer used by this class.
    
    @Override
    public void setByteBuffer(ByteBuffer srcBB){
        if ( srcBB != ){
            if (srcBB.capacity() > .capacity()) {
                 = .allocate(,
                                                ,srcBB.capacity()); 
            }
            srcBB.flip();
            .put(srcBB);
            srcBB.clear();
        } else {
             = srcBB;
        }
    }
      
    
Complete the transaction.
    @Override
    public void terminate(boolean keepAlive){     
        if (keepAlive){
            .recycle();
            registerKey(); 
            returnTask();
        } else {
            // Do not return AsyncReadTask to queue
            finishConnection();
        }
    }
    
    
Set appropriate attribute on the ProcessorTask.
    @Override
    public void configureProcessorTask(){
        super.configureProcessorTask();
        if ( !getTaskListeners().contains() ){
            addTaskListener((TaskListener));
        }
        if (!.getTaskListeners().contains(this)) {
            .addTaskListener(this);
        }
    } 
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