Spring Managed DI for Quartz Jobs With Dependencies

Problem Statement:

Quartz scheduler (v 2.1.3) triggers a job which has its own dependencies which needs to be managed using Spring (3.1.1.RELEASE+)

Solution:

The Job

public class HttpDealsDownloadJob implements Job {

// NO DEPENDENCIES HERE

  @Override

  public void execute(final JobExecutionContext context)

      throws JobExecutionException {

    final JobDataMap jdm = context.getJobDetail().getJobDataMap();
// EXTRACT YOUR DEPENDENCY FROM JOB DATA MAP

    final HttpFileDownloader delegate = (HttpFileDownloader) jdm

        .get("job.delegate");

    delegate.apply(context.getJobDetail().getJobDataMap().getWrappedMap());

  }

}

Spring Context

<bean id="mySchedulerFactoryBean"

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

<property name="configLocation" value="file:quartz.properties" />

<property name="jobFactory" ref="springBeanJobFactory" />

<property name="triggers">

<list>

<ref bean="myCronTriggerFactoryBean" />

</list>

</property>

</bean>

<bean id="springBeanJobFactory"

class="org.springframework.scheduling.quartz.SpringBeanJobFactory" />

<bean id="myCronTriggerFactoryBean"

class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">

<property name="cronExpression" value="${my.cron.expression}" />

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

</bean>

<bean id="myJobDetailFactoryBean"

class="org.springframework.scheduling.quartz.JobDetailFactoryBean">

<property name="jobDataAsMap">

<map>

<entry key="source.url" value="${my.deals.url}" />

<entry key="job.delegate" value-ref="httpFileDownloader" />

</map>

</property>

<property name="jobClass"

value="org.zero.gb.acequia.scheduler.HttpDealsDownloadJob" />
<!-- INJECT APPLICATION CONTEXT -->

<property name="applicationContextJobDataKey" value="appicationContext" />

</bean>
<!-- THIS IS THE CLASS WHICH ACTUALLY DOES THE WORK -->

<bean id="httpFileDownloader" class="org.zero.acequia.integration.http.HttpFileDownloader">

             <!-- your dependencies here -->

     </bean>