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/*
 * 
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 2007-2008 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
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package com.sun.grizzly;

import com.sun.grizzly.util.ConcurrentLinkedQueuePool;
import java.util.concurrent.Callable;

/**
 * Task, which will be executed by {@link Context}, when 
 * Context.execute({@link ContextTask}) is called.
 * 
 * @author Alexey Stashok
 */
public abstract class ContextTask implements Callable {
    protected Context context;

    public Context getContext() {
        return context;
    }

    public void setContext(Context context) {
        this.context = context;
    }
    
    public void recycle() {
        
        if (context != null) {
            context.getController().returnContext(context);
        }
        
        context = null;
    }
    
    /**
     * Return instance to the pool
     * WARN: Do not call super.offer(), as it can lead to multiple offer call
     */
    public abstract void offer();
    
    protected abstract static class TaskPool 
            extends ConcurrentLinkedQueuePool {

        @Override
        public void offer(E task) {
            task.recycle();
            super.offer(task);
        }
    }
}




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