timeservicebean.java

这个是学习EJB的好例子,里面有许多关于EJB Bean的

package com.cws.ejb.time;

import java.util.Date;

import javax.annotation.Resource;
import javax.ejb.Remote;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
import javax.ejb.Timer;

@Stateless
@Remote( { TimeService.class })
public class TimeServiceBean implements TimeService {
	private int count = 1;

	private @Resource SessionContext ctx;

	public void scheduleTimer(long milliseconds){
		
		count = 1;
		ctx.getTimerService()
			.createTimer(new Date(new Date().getTime() + milliseconds),milliseconds, 
					"大家好，这是我的第一个定时器");
}

	@Timeout
	public void timeoutHandler(Timer timer) {
		
		System.out.println("---------------------");
		System.out.println("定时器事件发生,传进的参数为: " + timer.getInfo());
		System.out.println("---------------------");
		if (count >= 5) {
			timer.cancel();// 如果定时器触发5 次，便终止定时器
		}
		count++;
	}
}