timermanager.java

冒险岛私服Java版服务端(Odinms)源代码。学习JAVA开发的朋友

/*
	This file is part of the OdinMS Maple Story Server
    Copyright (C) 2008 Patrick Huy <[e-mail]> 
                       Matthias Butz <[e-mail]>
                       Jan Christian Meyer <[e-mail]>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation. You may not use, modify
    or distribute this program under any other version of the
    GNU Affero General Public License.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package net.sf.odinms.server;

import java.lang.management.ManagementFactory;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import javax.management.MBeanServer;
import javax.management.ObjectName;

import net.sf.odinms.client.messages.MessageCallback;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TimerManager implements TimerManagerMBean {
	private static Logger log = LoggerFactory.getLogger(TimerManager.class);
	private static TimerManager instance = new TimerManager();
	private ScheduledThreadPoolExecutor ses;

	private TimerManager() {
		MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
		try {
			mBeanServer.registerMBean(this, new ObjectName("net.sf.odinms.server:type=TimerManger"));
		} catch (Exception e) {
			log.error("Error registering MBean", e);
		}
	}

	public static TimerManager getInstance() {
		return instance;
	}

	public void start() {
		if (ses != null && !ses.isShutdown() && !ses.isTerminated()) {
			return; //starting the same timermanager twice is no - op
		}
		ScheduledThreadPoolExecutor stpe = new ScheduledThreadPoolExecutor(4, new ThreadFactory() {
			private final AtomicInteger threadNumber = new AtomicInteger(1);
			@Override
			public Thread newThread(Runnable r) {
				Thread t = new Thread(r);
				t.setName("Timermanager-Worker-" + threadNumber.getAndIncrement());
				return t;
			}
		});
		stpe.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
		ses = stpe;
	}

	public void stop() {
		ses.shutdown();
	}
	
	public ScheduledFuture<?> register(Runnable r, long repeatTime, long delay) {
		return ses.scheduleAtFixedRate(new LoggingSaveRunnable(r), delay, repeatTime, TimeUnit.MILLISECONDS);
	}

	public ScheduledFuture<?> register(Runnable r, long repeatTime) {
		return ses.scheduleAtFixedRate(new LoggingSaveRunnable(r), 0, repeatTime, TimeUnit.MILLISECONDS);
	}

	public ScheduledFuture<?> schedule(Runnable r, long delay) {
		return ses.schedule(new LoggingSaveRunnable(r), delay, TimeUnit.MILLISECONDS);
	}
	
	public ScheduledFuture<?> scheduleAtTimestamp(Runnable r, long timestamp) {
		return schedule(r, timestamp - System.currentTimeMillis());
	}
	
	public void dropDebugInfo(MessageCallback callback) {
		StringBuilder builder = new StringBuilder();
		builder.append("Terminated: ");
		builder.append(ses.isTerminated());
		builder.append(" Shutdown: ");
		builder.append(ses.isShutdown());
		callback.dropMessage(builder.toString());
		
		builder = new StringBuilder();
		builder.append("Completed Tasks: ");
		builder.append(ses.getCompletedTaskCount());
		builder.append(" Active Tasks: ");
		builder.append(ses.getActiveCount());
		builder.append(" Task Count: ");
		builder.append(ses.getTaskCount());
		callback.dropMessage(builder.toString());

		builder = new StringBuilder();
		builder.append("Queued Tasks: ");
		builder.append(ses.getQueue().toArray().length);
		callback.dropMessage(builder.toString());
	}
	
	@Override
	public long getActiveCount() {
		return ses.getActiveCount();
	}

	@Override
	public long getCompletedTaskCount() {
		return ses.getCompletedTaskCount();
	}

	@Override
	public int getQueuedTasks() {
		return ses.getQueue().toArray().length;
	}

	@Override
	public long getTaskCount() {
		return ses.getTaskCount();
	}

	@Override
	public boolean isShutdown() {
		return ses.isShutdown();
	}

	@Override
	public boolean isTerminated() {
		return ses.isTerminated();
	}

	private static class LoggingSaveRunnable implements Runnable {
		Runnable r;

		public LoggingSaveRunnable(Runnable r) {
			this.r = r;
		}

		@Override
		public void run() {
			try {
				r.run();
			} catch (Throwable t) {
				log.error("ERROR", t);
			}
		}
	}
}