com.fusesource.forge.jmstest.executor.TerminatingThreadPoolExecutor.java Source code

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Here is the source code for com.fusesource.forge.jmstest.executor.TerminatingThreadPoolExecutor.java

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/*
 * Copyright (C) 2009, Progress Software Corporation and/or its
 * subsidiaries or affiliates.  All rights reserved.
 *
 * Licensed 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 com.fusesource.forge.jmstest.executor;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class TerminatingThreadPoolExecutor extends ThreadPoolExecutor {
    private AtomicLong lastSubmit = new AtomicLong(System.currentTimeMillis());
    private ScheduledThreadPoolExecutor scheduledChecker = null;

    private String name;

    private Log log = null;

    public TerminatingThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, long keepAliveTime,
            TimeUnit unit, BlockingQueue<Runnable> workQueue) {
        super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue);
        init(name);
    }

    public TerminatingThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, long keepAliveTime,
            TimeUnit unit, BlockingQueue<Runnable> workQueue, RejectedExecutionHandler handler) {
        super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler);
        init(name);
    }

    public TerminatingThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, long keepAliveTime,
            TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory,
            RejectedExecutionHandler handler) {
        super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory, handler);
        init(name);
    }

    public TerminatingThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, long keepAliveTime,
            TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory) {
        super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory);
        init(name);
    }

    private void init(String name) {
        setName(name);
        startChecker();
    }

    @Override
    public <T> Future<T> submit(Callable<T> task) {
        lastSubmit.set(System.currentTimeMillis());
        return super.submit(task);
    }

    @Override
    public <T> Future<T> submit(Runnable task, T result) {
        lastSubmit.set(System.currentTimeMillis());
        return super.submit(task, result);
    }

    @Override
    public Future<?> submit(Runnable task) {
        lastSubmit.set(System.currentTimeMillis());
        return super.submit(task);
    }

    private void startChecker() {
        scheduledChecker = new ScheduledThreadPoolExecutor(1);
        scheduledChecker.scheduleAtFixedRate(new Runnable() {

            public void run() {
                log().debug("Checking Terminate condition for " + getName());
                long currentTime = System.currentTimeMillis();
                if (getActiveCount() == 0) {
                    if (currentTime - lastSubmit.get() >= getKeepAliveTime(TimeUnit.MILLISECONDS)) {
                        log().debug("Shutting down...");
                        shutdown();
                    }
                }
            }
        }, getKeepAliveTime(TimeUnit.NANOSECONDS), getKeepAliveTime(TimeUnit.NANOSECONDS), TimeUnit.NANOSECONDS);

    }

    public String getName() {
        if (name == null) {
            name = this.getClass().getName();
        }
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public void shutdown() {
        if (scheduledChecker != null) {
            scheduledChecker.shutdown();
        }
        super.shutdown();
    }

    private Log log() {
        if (log == null) {
            log = LogFactory.getLog(this.getClass());
        }
        return log;
    }

}