ThreadPoolExecutorMonitor.java

/*
 * Copyright (c) 2012-2014, Parallel Universe Software Co. All rights reserved.
 * 
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *  
 *   or (per the licensee's choosing)
 *  
 * under the terms of the GNU Lesser General Public License version 3.0
 * as published by the Free Software Foundation.
 */
package co.paralleluniverse.common.monitoring;

import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 *
 * @author pron
 */
public class ThreadPoolExecutorMonitor extends Monitor<ThreadPoolExecutor> implements ThreadPoolExecutorMXBean {
    public static void register(String name, ThreadPoolExecutor executor) {
        new ThreadPoolExecutorMonitor(name, executor);
    }
    
    public ThreadPoolExecutorMonitor(String name, ThreadPoolExecutor executor) {
        super("co.paralleluniverse:type=ThreadPoolExecutor,name=" + name, executor);
        registerMBean();
    }

    @Override
    public boolean isTerminating() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return false;
        return executor.isTerminating();
    }

    @Override
    public boolean isTerminated() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return false;
        return executor.isTerminated();
    }

    @Override
    public boolean isShutdown() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return false;
        return executor.isShutdown();
    }

    @Override
    public long getTaskCount() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getTaskCount();
    }

    @Override
    public String getRejectedExecutionHandler() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return null;
        return executor.getRejectedExecutionHandler().toString();
    }

    @Override
    public int getPoolSize() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getPoolSize();
    }

    @Override
    public int getMaximumPoolSize() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getMaximumPoolSize();
    }

    @Override
    public int getLargestPoolSize() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getLargestPoolSize();
    }

    @Override
    public long getKeepAliveTime() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getKeepAliveTime(TimeUnit.MILLISECONDS);
    }

    @Override
    public int getCorePoolSize() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getCorePoolSize();
    }

    @Override
    public long getCompletedTaskCount() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getCompletedTaskCount();
    }

    @Override
    public int getActiveCount() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getActiveCount();
    }
    
    @Override
    public int getQueuedTasks() {
        final ThreadPoolExecutor executor = getMonitored();
        if (executor == null)
            return -1;
        return executor.getQueue().size();
    }
}