Rescheduling a CronTriggerBean dynamically with same job details in Spring

问题

My task is to generate the reports dynamically with the scheduled time specified by the user from the GUI.

I am using the following code in the application context of my application in spring to generate the report daily 6 A.M..

<bean name="scheduleRptJob" class="org.springframework.scheduling.quartz.JobDetailBean">
    <property name="jobClass" value="com.secant.qatool.report.scheduler.ScheduleCroneJob"/>
</bean>

<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
    <property name="jobDetail" ref="scheduleRptJob" />

<bean id="schedulerFactory"  class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    <property name="triggers">
        <list>
            <ref bean="cronTrigger"/>
        </list>
    </property>
</bean>

I am changing the cron expression dynamically from the controller with the following code. But it is not working.

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

    String hours = time[0];
    String minutes = time[1];

    String croneExp = " 00 " + minutes + " " + hours + " * * ? ";

    log.debug("CRONE EXP :: " + croneExp);

    cronTrigger.clearAllTriggerListeners();

    // Setting the crown expression.
    cronTrigger.setCronExpression(croneExp);

    Trigger[] triggers = {cronTrigger};

    // Code to pause and start the cron trigger.
    schedulerFactory.stop();
    schedulerFactory.setTriggers(triggers);
    schedulerFactory.start();

Could someone please help me how to reschedule the same job with dynamic time.

Thanks,

-Anil Kumar.C

回答1:

there is a thread in the spring forum about this, and it seams they found a solution for your problem: http://forum.springsource.org/showthread.php?t=31736

but instead of manually change the cron expression in the file you could use the spring expression language to read it each time from your object holding the value.

回答2:

I have found this thread where they read a cron expr from DB and then reschedule the job. You just wouldn't read it from DB, but pass it directly from GUI as you want.

来源：https://stackoverflow.com/questions/4778625/rescheduling-a-crontriggerbean-dynamically-with-same-job-details-in-spring

标签

Spring

scheduling

quartz-scheduler

crontab