Commonj Timer 使用

Java 定时器之commonj timer，jms & mdb驱动，servlet 初始化：

Business：

package com.wxs.simple.ejb;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.naming.InitialContext;

import com.wx.simple.listener.ScheduleTaskListener;

import commonj.timers.Timer;
import commonj.timers.TimerListener;
import commonj.timers.TimerManager;

@Stateless(name = "ScheduleBean_stateless", mappedName = "ScheduleBean")
@Remote(ScheduleBeanRemote.class)
public class ScheduleBean implements ScheduleBeanRemote {
	Timer timer = null;

	@PostConstruct
	public void init() {
		System.out
				.println("service() entering try block to intialize the timer from JNDI");
		try {
			System.out.println("In ScheduleBean -> scheduleService method");
			InitialContext ic = new InitialContext();
			TimerManager jobScheduler = (TimerManager) ic
					.lookup("weblogic.JobScheduler");
			System.out.println("jobScheduler reference " + jobScheduler);
			TimerListener timerListener = new ScheduleTaskListener();
			System.out.println("timerListener reference " + timerListener);
			timer = jobScheduler.schedule(timerListener, 0, 30 * 1000);

			// execute this job every 5 seconds
			System.out.println("service() started the timer");
		} catch (Throwable t) {
			System.out
					.println("service() error initializing timer manager with JNDI name weblogic.JobScheduler "
							+ t);
		}
	}
	
	@PreDestroy
	public void clearTimer(){
		System.out.println("Begin stop timer!");
		timer.cancel();
		System.out.println("End stop timer!");
	}

	public void scheduleService() {
		System.out
				.println("In ScheduleBean ->scheduleService method, do Task... ");
	}
}

jms：

package com.wx.simple.listener;

import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import commonj.timers.Timer;
import commonj.timers.TimerListener;

public class ScheduleTaskListener implements Serializable, TimerListener {

	private static final long serialVersionUID = 8313912206357147939L;

	public void timerExpired(Timer timer) {
		SimpleDateFormat sdf = new SimpleDateFormat();
		System.out.println("In ScheduleTaskListener-> timerExpired method"
				+ sdf.format(new Date()));
		try {
			InitialContext iniCtx = new InitialContext(System.getProperties());
			TopicConnectionFactory factory = (TopicConnectionFactory) iniCtx
					.lookup("javax.jms.TopicConnectionFactory");
			TopicConnection con = factory.createTopicConnection();
			TopicSession session = con.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
			Topic topic = (Topic)iniCtx.lookup("jms/Topic");
			TopicPublisher pub = session.createPublisher(topic);
			TextMessage tmsg = session.createTextMessage();
			tmsg.setText("Schedule for batch distribution...");
			System.out.println("Begin send message...");
			pub.send(tmsg);
			System.out.println("End send message....");
			pub.close();
			System.out.println("End ScheduleTaskListener-> timerExpired method");
		} catch (NamingException e) {
			e.printStackTrace();
		} catch (JMSException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

mdb：

package com.wx.simple.ejb;

import javax.ejb.ActivationConfigProperty;
import javax.ejb.MessageDriven;
import javax.jms.Message;
import javax.jms.MessageListener;

@MessageDriven(activationConfig = {
		@ActivationConfigProperty(propertyName="destinationType",
				propertyValue="javax.jms.Topic")
})
public class DoBatchBusiness implements MessageListener{

	public void onMessage(Message msg) {
		System.out.println("In method onMessage");
		if (null != msg) {
			System.out.println("received message from schedule task listener:"+msg);
		}
	}

}