Quartz represents an enterprise job scheduler. The mechanism of Quartz can be compared to Linux Cron jobs or JDK Timers. Spring integrates Quartz to offer scheduling and thread pooling features.
The following example describes two scheduling triggers/jobs. Triggers define the scheduling interval or the exact time of job execution. The SchedulerFactory references the triggers and initiates the scheduling.
<bean name="checkFTPForUpdates" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass" value="org.developers.blog.example.spring.CheckFTPJob" />
</bean>
<bean name="checkDBForNewOrders" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass" value="org.developers.blog.example.spring.CheckOrderDBJob" />
</bean>
<bean id="cronFTPCheckTriggerBean" class="org.springframework.scheduling.quartz.CronTriggerBean">
<property name="jobDetail" ref="checkFTPForUpdates" />
<!-- run at 14 PM every day -->
<property name="cronExpression" value="0 0 14 * * ?" />
</bean>
<bean id="cronOrdersCheckTriggerBean" class="org.springframework.scheduling.quartz.CronTriggerBean">
<property name="jobDetail" ref="checkDBForNewOrders" />
<!-- run at 17 PM every day -->
<property name="cronExpression" value="0 0 17 * * ?" />
</bean>
<bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="cronFTPCheckTriggerBean" />
<ref bean="cronOrdersCheckTriggerBean" />
</list>
</property>
</bean>
The Job classes have the following structure.
public class CheckFTPJob extends QuartzJobBean {
protected void executeInternal(JobExecutionContext ctx) throws JobExecutionException {
// check FTP
}
}
public class CheckOrderDBJob extends QuartzJobBean {
protected void executeInternal(JobExecutionContext ctx) throws JobExecutionException {
// check DB
}
}
RegardsRafael Sobek
Technorati Tags: Spring Scheduling Quartz
Nice article but I have a query. How the method in Job classes would be invoked? I mean how the JobExecutionContext ref would be obtained by calling class? I tried your example but now I'm stuck. Please do reply