Quartz Scheduler with Spring 4

Spring provides couple of classes that simplify the usage of Quartz within Spring-based applications.

There are 2 ways to configure a Job in Spring using Quartz:

A : Using MethodInvokingJobDetailFactoryBean

    This is the simplest among two.

<!-- For times when you just need to invoke a method on a specific object -->

<bean id="simpleJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">

    <property name="targetObject" ref="myJobBean" />

    <property name="targetMethod" value="myMethod" />

</bean>

Above job configuration simply invokes myMethod method of bean myJobBean which is simple POJO

B : Using JobDetailFactoryBean

When you need more advanced setup, need to pass data to job, being more flexible.

<!-- For times when you need more complex processing, passing data to the scheduled job -->

<bean name="complexJobDetail"    class="org.springframework.scheduling.quartz.JobDetailFactoryBean">

    <property name="jobClass" value="com.websystique.spring.quartz.ScheduledJob" />

    <property name="jobDataMap">

        <map>

            <entry key="anotherBean" value-ref="anotherBean" />

        </map>

    </property>

    <property name="durability" value="true" />

</bean>

 Also there are two method to configure trigger:

Trigger defines the time when scheduler will run your scheduled job. There are two possible trigger type:
A: Simple Trigger , using SimpleTriggerFactoryBean
You can specify start time, delay between triggers and repeatInterval(frequency) to run the job.

<!-- Run the job every 2 seconds with initial delay of 1 second --> <bean id="simpleTrigger"  class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">     <property name="jobDetail" ref="simpleJobDetail" />     <property name="startDelay" value="1000" />     <property name="repeatInterval" value="2000" /> </bean>

B: Cron Trigger , using CronTriggerFactoryBean
It’s more flexible and allows you to choose scheduled job at specific instance (time, day, date,..) and frequency in future.

<!-- Run the job every 5 seconds only on Weekends -->

<bean id="cronTrigger"  class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">

    <property name="jobDetail" ref="complexJobDetail" />

    <property name="cronExpression" value="0/5 * * ? * SAT-SUN" />

</bean>

 

SchedulerFactoryBean glues together jobDetails and triggers to Configure Quartz Scheduler

<!-- Scheduler factory bean to glue together jobDetails and triggers to Configure Quartz Scheduler -->

<bean  class="org.springframework.scheduling.quartz.SchedulerFactoryBean">

    <property name="jobDetails">

        <list>

            <ref bean="simpleJobDetail" />

            <ref bean="complexJobDetail" />

        </list>

    </property>

    <property name="triggers">

        <list>

            <ref bean="simpleTrigger" />

            <ref bean="cronTrigger" />

        </list>

    </property>

</bean>