videoalliance/.svn/pristine/1c/1ce231ed32ceda67ddf7788701e180ad9a3b77ee.svn-base

package com.chinacreator.videoalliance.order.util;

import com.chinacreator.videoalliance.common.util.DataSource;
import com.frameworkset.common.poolman.SQLExecutor;
import org.apache.log4j.Logger;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import java.util.TimerTask;

/**
 * 监控器，用于项目启动时连接数据库，每隔5秒连接一次
 * 防止数据库长时间未连接造成断连
 * @author xu.zhou
 * @date 20210108
 */
public class ContextListener implements ServletContextListener {
	
	private java.util.Timer timer = null;    
	
	private static Logger logger = Logger.getLogger(TimerTask.class);

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

	@Override
	public void contextInitialized(ServletContextEvent arg0) {
		logger.info("启动定时任务");   
        timer = new java.util.Timer(true);                 
        //每天的date时刻执行task，每隔persion 时间重复执行  
        //timer.schedule(new Dbtask(), 1000, 1000 * 5);  
        timer.schedule(new TimerTask() {

			@Override
			public void run() {
				try {
					try{
                        String sql = "select to_char(sysdate, 'yyyy-MM-dd HH24:mi:ss') from dual";
                        String res = SQLExecutor.queryFieldWithDBName(DataSource.NET3G, sql);
                        logger.info("当前时间："+res);
					}catch(Exception e){
						logger.error(e.getMessage());
			            e.printStackTrace();
			        } finally {
			        }
				} catch (Exception e) {
					logger.error("监控器定时任务执行出现异常，"+e.getMessage(),e);
				}
			}
        	
        }, 1000, 1000 * 5);//1秒钟后开始执行，每隔5秒钟执行一次          
        logger.info("已经添加任务调度表"); 
	}  
}