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/*
 * 
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * 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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 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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package com.sun.grizzly.http;

import java.io.IOException;

import java.util.concurrent.ExecutorService;
import com.sun.grizzly.Connection;

/**
 * Abstract implementation of a {@link Task} object.
 *
 * @author Jean-Francois Arcand
 */
public abstract class TaskBase implements Task{
    
    
    /**
     * The {@link ExecutorService} object associated with this
     * {@link Task}
     */
    protected ExecutorService threadPool;
    
    
    /**
     * The {@link Connection} used by this task.
     */
    protected Connection connection;

    /**
     * The {@link WebFilter}.
     */
    protected WebFilter webFilter;
    
    /**
     * A {@link TaskListener} associated with this instance.
     */
    private TaskListener taskListener;

    // ------------------------------------------------------------------//

    public WebFilter getWebFilter() {
        return webFilter;
    }

    public void setWebFilter(WebFilter webFilter) {
        this.webFilter = webFilter;
    }
    
    /**
     * Set the thread pool on which Worker Threads will synchronize.
     */
    public void setThreadPool(ExecutorService threadPool){
        this.threadPool = threadPool;
    }
    
    
    /**
     * Return the thread pool used by this object.
     */
    public ExecutorService getThreadPool(){
        return threadPool;
    }

    public Connection getConnection() {
        return connection;
    }

    public void setConnection(Connection connection) {
        this.connection = connection;
    }
    
    
    /**
     * Execute the task based on its {@link ExecutorService}. If the
     * {@link ExecutorService} is null, then execute the task on using the
     * calling thread.
     */
    public void execute(){
        if (threadPool != null) {
            threadPool.execute(this);
        } else {
            run();
        }
    }
    
       
    /**
     * Recycle internal state.
     */
    public void recycle(){
    }
       
    
    /**
     * Some {@link ExecutorService} implementation requires a instance of
     * Runnable instance.
     */
    public void run(){
        try{
            doTask();
        } catch (IOException ex){
            throw new RuntimeException(ex);
        }
    }
    
    /**
     * By default, do nothing when a Callable is invoked.
     */
    public Object call() throws Exception{
        doTask();
        return null;
    }

    /**
     * The {@link TaskListener} associated with this instance.
     * @return  {@link TaskListener} associated with this instance.
     */
    public TaskListener getTaskListener() {
        return taskListener;
    }

    /**
     * Set the {@link TaskListener} associated with this class.
     * @param  {@link TaskListener} associated with this instance.
     */ 
    public void setTaskListener(TaskListener taskListener) {
        this.taskListener = taskListener;
    }
      
}