dblistener.java

本代码是一个权限管理系统源代码

package com.seavision.PermissionManage.help;

import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import net.sf.hibernate.HibernateException;

public class DBListener implements ServletContextListener {
	Timer timer = new Timer();

	public void contextInitialized(ServletContextEvent arg0) {
		timer.schedule(new TestTask(), 0, 1000 * 60 * 60 * 7);
	}

	public void contextDestroyed(ServletContextEvent arg0) {
		// TODO Auto-generated method stub
	}

	class TestTask extends TimerTask {
		public void run() {
			try {
				List list = HibernateUtil.queryHQL("from UserVO");
				if (list == null) {
					System.out.println("数据库运行异常！");
				} else {
					System.out.println("数据库运行正常！==" + list.size());
				}
			} catch (HibernateException e) {
				// TODO Auto-generated catch block
				System.out.println("数据库运行异常！");
				e.printStackTrace();
			}

		}
	}

}