Quartz在Spring中动态设置cronExpression (spring设置动态定时任务)

什么是动态定时任务:是由客户制定生成的,服务端只知道该去执行什么任务,但任务的定时是不确定的(是由客户制定)。这样总不能修改配置文件每定制个定时任务就增加一个trigger吧,即便允许客户修改配置文件,但总需要重新启动web服务啊,研究了下Quartz在Spring中的动态定时,发现<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean" >          <property name="jobDetail" ref="schedulerJobDetail"/>          <property name="cronExpression">              <value>0/10 * * * * ?</value>          </property>     中cronExpression是关键,如果可以动态设置cronExpression的值,也就说如果我们可以直接调用CronTriggerBean中设置cronExpression的方法,就可以顺利解决问题了。熟悉1的朋友可以跳过不看,下面2、3是动态定时任务的具体实现。1. Quartz在Spring中的简单配置Spring配置文件:     <bean id="schedulerJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">         <property name="targetObject" ref="scheduleInfoAction"/>         <property name="targetMethod" value="simpleJobTest"/>         <property name="concurrent" value="false"/>     </bean>     <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean" >          <property name="jobDetail" ref="schedulerJobDetail"/>          <property name="cronExpression">              <value>0/10 * * * * ?</value>          </property>      </bean>     <bean id="schedulerFactory" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">         <property name="triggers">             <list>                 <ref local="cronTrigger"/>             </list>         </property></bean>在上面的配置中设定了① targetMethod: 指定需要定时执行scheduleInfoAction中的simpleJobTest()方法② concurrent:对于相同的JobDetail,当指定多个Trigger时, 很可能第一个job完成之前,第二个job就开始了。指定concurrent设为false,多个job不会并发运行,第二个job将不会在第一个job完成之前开始。③ cronExpression:0/10 * * * * ?表示每10秒执行一次,具体可参考附表。④ triggers:通过再添加其他的ref元素可在list中放置多个触发器。scheduleInfoAction中的simpleJobTest()方法注意:此方法没有参数,如果scheduleInfoAction有两个方法simpleJobTest()和simpleJobTest(String argument),则spring只会去执行无参的simpleJobTest().public void simpleJobTest() {          log.warn("uh oh, Job is scheduled !'" + "' Success...");     }2.Quartz在Spring中动态设置cronTrigger方法一Spring配置文件:<bean id="scheduleInfoAction" class="com.lively.happyoa.jobs.webapp.action.ScheduleInfoAction">         <property name="scheduler" ref="schedulerFactory"/>         <property name="scheduleInfoManager" ref="scheduleInfoManager"/>     </bean>     <bean id="schedulerJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">         <property name="targetObject" ref="scheduleInfoAction"/>         <property name="targetMethod" value="reScheduleJob"/>         <property name="concurrent" value="false"/>     </bean>     <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean" >          <property name="jobDetail" ref="schedulerJobDetail"/>          <property name="cronExpression">              <value>0/10 * * * * ?</value>          </property>      </bean>     <bean id="schedulerFactory" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">         <property name="triggers">             <list>                 <ref local="cronTrigger"/>             </list>         </property></bean>scheduleInfoAction中的reScheduleJob ()方法及相关方法① reScheduleJob读取数据库,获得自定义定时器调度时间():     private void reScheduleJob() throws SchedulerException, ParseException {         // 运行时可通过动态注入的scheduler得到trigger         CronTriggerBean trigger = (CronTriggerBean) scheduler.getTrigger(                "cronTrigger", Scheduler.DEFAULT_GROUP);         String dbCronExpression = getCronExpressionFromDB();         String originConExpression = trigger.getCronExpression();     // 判断从DB中取得的任务时间(dbCronExpression)和现在的quartz线程中的任务时间(originConExpression)是否相等     // 如果相等,则表示用户并没有重新设定数据库中的任务时间,这种情况不需要重新rescheduleJob         if(!originConExpression.equalsIgnoreCase(dbCronExpression)){             trigger.setCronExpression(dbCronExpression);             scheduler.rescheduleJob("cronTrigger", Scheduler.DEFAULT_GROUP, trigger);         }     // 下面是具体的job内容,可自行设置     // executeJobDetail();}② getCronExpressionFromDB():从数据库中获得dbCronExpression的具体代码,由于使用了scheduleInfoManager,所以要在定义相应的setter方法     private String getCronExpressionFromDB(){         String sql="from ScheduleInfo scheduleInfo where 1=1 ";         sql=sql+" and scheduleInfo.infoId = '"+"1" + "'";         List scheduleList = scheduleInfoManager.queryScheduleInListBySql(sql);         ScheduleInfo scheduleInfo = (ScheduleInfo)scheduleList.get(0);         String dbCronExpression = scheduleInfo.getCronExpression();         return dbCronExpression;}③ 在spring配置文件的scheduleInfoAction配置了相应的property(scheduler/ scheduleInfoManager),要为其设置setter方法     private Scheduler scheduler;     // 设值注入,通过setter方法传入被调用者的实例scheduler     public void setScheduler(Scheduler scheduler) {         this.scheduler = scheduler;    }     private ScheduleInfoManager scheduleInfoManager;     // 设值注入,通过setter方法传入被调用者的实例scheduleInfoManager     public void setScheduleInfoManager(ScheduleInfoManager scheduleInfoManager){         this.scheduleInfoManager = scheduleInfoManager;     }3. Quartz在Spring中动态设置cronTrigger方法二在上面的2中我们可以看到,尽管已经可以动态进行rescheduleJob了,不过依然需要我们设置一个cronExpression,如果尝试一下拿掉spring配置中的         <property name="cronExpression">              <value>0/10 * * * * ?</value>          </property>则容器(如tomcat)启动时会报错。实际中我们希望tomcat启动时就可以直接去读数据库,拿到相应的dbCronExpression,然后定时执行一个job,而不希望配置初始的cronExpression ,观察下面的CronTriggerBean,考虑到cronExpression需要初始化,如果设定一个类InitializingCronTrigger继承CronTriggerBean,然后在这个类中做一些读取DB的初始化工作(设置cronExpression),问题就可以解决了。Spring配置文件:<bean id="scheduleInfoAction" class="com.lively.happyoa.jobs.webapp.action.ScheduleInfoAction">         <property name="scheduler" ref="schedulerFactory"/>         <property name="scheduleInfoManager" ref="scheduleInfoManager"/>     </bean>     <bean id="schedulerJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">         <property name="targetObject" ref="scheduleInfoAction"/>         <property name="targetMethod" value="reScheduleJob"/>         <property name="concurrent" value="false"/>     </bean>    <bean id="cronTrigger" class="com.lively.happyoa.jobs.webapp.action.ScheduleInfoAction.InitializingCronTrigger">          <property name="jobDetail" ref="schedulerJobDetail"/>         <!--<property name="cronExpression">              <value>0/10 * * * * ?</value>          </property>-->          <property name="scheduleInfoManager" ref="scheduleInfoManager"/>      </bean>     <bean id="schedulerFactory" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">         <property name="triggers">             <list>                 <ref local="cronTrigger"/>             </list>         </property></bean>InitializingCronTrigger中的相关方法注意:在注入scheduleInfoManager属性的时候,我们可以去读取DB任务时间(之所以放在setter方法中,是因为需要在设置scheduleInfoManager后进行getCronExpressionFromDB(),否则,也可以①②逻辑把放在类的构造函数中).注意InitializingCronTrigger必须extends CronTriggerBean.public class InitializingCronTrigger extends CronTriggerBean implements Serializable {     private ScheduleInfoManager scheduleInfoManager;     // 设值注入,通过setter方法传入被调用者的实例scheduleInfoManager     public void setScheduleInfoManager(ScheduleInfoManager scheduleInfoManager){         this.scheduleInfoManager = scheduleInfoManager;         // 因为在getCronExpressionFromDB使用到了scheduleInfoManager,所以         // 必须上一行代码设置scheduleInfoManager后进行getCronExpressionFromDB         String cronExpression = getCronExpressionFromDB ();    // ①         // 因为extends CronTriggerBean ,此处调用父类方法初始化cronExpression        setCronExpression(cronExpression);                     // ②}     private String getCronExpressionFromDB(){         String sql="from ScheduleInfo scheduleInfo where 1=1 ";         sql=sql+" and scheduleInfo.infoId = '"+"1" + "'";         List scheduleList = scheduleInfoManager.queryScheduleInListBySql(sql);         ScheduleInfo scheduleInfo = (ScheduleInfo)scheduleList.get(0);         String dbCronExpression = scheduleInfo.getCronExpression();         return dbCronExpression;}……}附表:"0 0 12 * * ?" 每天中午12点触发
"0 15 10 ? * *" 每天上午10:15触发
"0 15 10 * * ?" 每天上午10:15触发
"0 15 10 * * ? *" 每天上午10:15触发
"0 15 10 * * ? 2005" 2005年的每天上午10:15触发
"0 * 14 * * ?" 在每天下午2点到下午2:59期间的每1分钟触发
"0 0/5 14 * * ?" 在每天下午2点到下午2:55期间的每5分钟触发
"0 0/5 14,18 * * ?" 在每天下午2点到2:55期间和下午6点到6:55期间的每5分钟触发
"0 0-5 14 * * ?" 在每天下午2点到下午2:05期间的每1分钟触发
"0 10,44 14 ? 3 WED" 每年三月的星期三的下午2:10和2:44触发
"0 15 10 ? * MON-FRI" 周一至周五的上午10:15触发
"0 15 10 15 * ?" 每月15日上午10:15触发
"0 15 10 L * ?" 每月最后一日的上午10:15触发
"0 15 10 ? * 6L" 每月的最后一个星期五上午10:15触发
"0 15 10 ? * 6L 2002-2005" 2002年至2005年的每月的最后一个星期五上午10:15触发
"0 15 10 ? * 6#3" 每月的第三个星期五上午10:15触发

至于每个符号 看看例子就好了.很简单了.





package com.sundoctor.quartz.service;

import java.text.ParseException;
import java.util.Date;
import java.util.UUID;

import org.quartz.CronExpression;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SimpleTrigger;
import org.quartz.Trigger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

@Service("schedulerService")
public class SchedulerServiceImpl implements SchedulerService {

	private Scheduler scheduler;
	private JobDetail jobDetail;

	@Autowired
	public void setJobDetail(@Qualifier("jobDetail") JobDetail jobDetail) {
		this.jobDetail = jobDetail;
	}

	@Autowired
	public void setScheduler(@Qualifier("quartzScheduler") Scheduler scheduler) {
		this.scheduler = scheduler;
	}

	@Override
	public void schedule(String cronExpression) {
		schedule(null, cronExpression);
	}

	@Override
	public void schedule(String name, String cronExpression) {
		try {
			schedule(name, new CronExpression(cronExpression));
		} catch (ParseException e) {
			throw new RuntimeException(e);
		}
	}

	@Override
	public void schedule(CronExpression cronExpression) {
		schedule(null, cronExpression);
	}

	@Override
	public void schedule(String name, CronExpression cronExpression) {
		if (name == null || name.trim().equals("")) {
			name = UUID.randomUUID().toString();
		}

		try {
			scheduler.addJob(jobDetail, true);

			CronTrigger cronTrigger = new CronTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
					Scheduler.DEFAULT_GROUP);
			cronTrigger.setCronExpression(cronExpression);
			scheduler.scheduleJob(cronTrigger);
			scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, cronTrigger);
		} catch (SchedulerException e) {
			throw new RuntimeException(e);
		}
	}
	
	@Override
	public void modifyTime(String name,String time)
	{
		try {
			Trigger trigger = scheduler.getTrigger(name, Scheduler.DEFAULT_GROUP);
			if (trigger != null && trigger instanceof CronTrigger)
			{
				System.out.println("modify time");
				CronTrigger cronTrigger = (CronTrigger)trigger;
				//scheduler.unscheduleJob(name, Scheduler.DEFAULT_GROUP);
				//scheduler.pauseTrigger(name, Scheduler.DEFAULT_GROUP);
				//schedule(name,time);
				cronTrigger.setCronExpression(time);
//				scheduler.resumeTrigger(name, Scheduler.DEFAULT_GROUP);
				scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, cronTrigger);
				System.out.println("modify success");
			}
		} catch (SchedulerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Override
	public void schedule(Date startTime) {
		schedule(startTime, null);
	}

	@Override
	public void schedule(String name, Date startTime) {
		schedule(name, startTime, null);
	}

	@Override
	public void schedule(Date startTime, Date endTime) {
		schedule(startTime, endTime, 0);
	}

	@Override
	public void schedule(String name, Date startTime, Date endTime) {
		schedule(name, startTime, endTime, 0);
	}

	@Override
	public void schedule(Date startTime, Date endTime, int repeatCount) {
		schedule(null, startTime, endTime, 0);
	}

	@Override
	public void schedule(String name, Date startTime, Date endTime, int repeatCount) {
		schedule(name, startTime, endTime, 0, 0L);
	}

	@Override
	public void schedule(Date startTime, Date endTime, int repeatCount, long repeatInterval) {
		schedule(null, startTime, endTime, repeatCount, repeatInterval);
	}

	@Override
	public void schedule(String name, Date startTime, Date endTime, int repeatCount, long repeatInterval) {
		if (name == null || name.trim().equals("")) {
			name = UUID.randomUUID().toString();
		}

		try {
			scheduler.addJob(jobDetail, true);

			SimpleTrigger SimpleTrigger = new SimpleTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
					Scheduler.DEFAULT_GROUP, startTime, endTime, repeatCount, repeatInterval);
			scheduler.scheduleJob(SimpleTrigger);
			scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, SimpleTrigger);

		} catch (SchedulerException e) {
			throw new RuntimeException(e);
		}
	}
}




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