Web App使用Quartz实现java schedule job

关于Quartz

1 下载Quartz java包copy到WEB-INF/lib下

2 建立 scheduler初始化servlet

在web.xml里加入

<servlet>

<servlet-name>Initializer</servlet-name>

<servlet-class>

com.nova.colimas.web.action.StartupServlet

</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

初始化servlet代码如下：

public class StartupServlet extends HttpServlet {

public void init(ServletConfig cfg) throws

javax.servlet.ServletException {

initScheduler(cfg);

return;

}

protected void initScheduler(ServletConfig cfg){

logger.info("Quartz Init Servlet loaded, initializing Scheduler...");

// Start now

try{

// Create an default instance of the Scheduler

Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();

//将scheduler存入serlvet上下文。 cfg.getServletContext().setAttribute(Constants.SCHEDULER_KEY,scheduler);

}catch(Exception e){

logger.error("Quartz Init Servlet failed");

}

}

}

3 程序配置一个schedule job

/**

* @author tyrone

*

* TODO To change the template for this generated type comment go to

* Window - Preferences - Java - Code Style - Code Templates

*/

public class BatchEditAction extends Action implements PrivilegedAction {

private static Logger logger = null;

private Scheduler scheduler=null;

public ActionForward execute(ActionMapping mapping,

ActionForm form,

HttpServletRequest request,

HttpServletResponse response)

throws Exception{

ActionMessages errors=new ActionMessages();

logger = Logger.getLogger(this.getClass());

//获得Servlet上下文

ServletContext ctx =

request.getSession().getServletContext();

//获得scheduler对象

scheduler=(Scheduler)ctx.getAttribute(Constants.SCHEDULER_KEY);

//根据form属性建立job

createJob(form);

try{

logger.info("Scheduler starting up...");

//启动scheduler。

scheduler.start();

}catch(Exception e){

logger.error("scheduler get error");

}

return mapping.findForward("success");

}

/**

* create a job based on form info.

* @param form

* @return

*/

protected void createJob(ActionForm form) throws Exception{

BatchInfoForm batchinfo=(BatchInfoForm)form;

String classname=batchinfo.getFile();

SimpleTrigger sTrigger=null;

JobDetail jobDetail=null;

Calendar cal=null;

//如果是一天一次的job

if (batchinfo.getFrequency().equalsIgnoreCase("onceDaily")){

logger.info("Batch run OnceDaily");

cal = new AnnualCalendar();

//Add Calendar to the Scheduler

/*

* Setup a trigger to start firing now, with a null end date/time,

* repeat forever and have (hour*60+ minute)*60000 ms between each firing.

*/
//开始时间：<time hour="11" minute="45">11:45</time>

String[] time=batchinfo.getDailyStartTime().split(":");

java.util.Calendar rightNow = java.util.Calendar.getInstance();

rightNow.set(java.util.Calendar.HOUR_OF_DAY,new Integer(time[0]).intValue());

rightNow.set(java.util.Calendar.MINUTE,new Integer(time[1]).intValue());

//间隔24小时

long repeatInterval=24*60*60000;

sTrigger = new SimpleTrigger("Trigger",

Scheduler.DEFAULT_GROUP, rightNow.getTime(), null,

SimpleTrigger.REPEAT_INDEFINITELY, repeatInterval);

}

}

// Trigger 关联一个Calendar, batchinfo.getName()唯一表示一个Calendar

sTrigger.setCalendarName(batchinfo.getName());

scheduler.addCalendar(batchinfo.getName(), cal, true, true);

try{

//job类名为com.nova.colimas.job.Test

jobDetail = new JobDetail(classname,

Scheduler.DEFAULT_GROUP, Class.forName(classname));

//job关联一个Trigger，加入scheduler

scheduler.scheduleJob(jobDetail, sTrigger);

}catch(ClassNotFoundException ex){

logger.error(ex);

throw new Exception();

}

return ;

}

}

4 Job代码，job必须继承org.quartz.Job

package com.nova.colimas.job;

import org.apache.log4j.Logger;

import org.quartz.Job;

import org.quartz.JobExecutionContext;

import org.quartz.JobExecutionException;

public class Test implements Job {

private static Logger logger = null;

public void execute(JobExecutionContext arg0) throws JobExecutionException {

// 定时运行。

logger = Logger.getLogger(this.getClass());

logger.info("test job is running");

}

}

5 运行结果

[framework] 2005-08-23 11:45:29,440 - com.nova.colimas.job.Test -215700 [DefaultQuartzScheduler_Worker-0] INFO com.nova.colimas.job.Test - test job is running