是的,Spring Quartz 可以處理任務(wù)依賴。Quartz 是一個功能強大的開源作業(yè)調(diào)度框架,它支持任務(wù)之間的依賴關(guān)系。為了實現(xiàn)任務(wù)依賴,你可以使用 Quartz 的 JobListener 和 TriggerListener 監(jiān)聽器來監(jiān)控任務(wù)的執(zhí)行情況,并根據(jù)需要調(diào)整任務(wù)的執(zhí)行順序。
以下是一個簡單的示例,說明如何在 Spring Quartz 中處理任務(wù)依賴:
public class TaskA implements Job {
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
System.out.println("Task A is executed.");
}
}
public class TaskB implements Job {
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
System.out.println("Task B is executed.");
}
}
<bean id="taskA" class="com.example.TaskA" />
<bean id="taskB" class="com.example.TaskB" />
<bean id="taskATrigger" class="org.quartz.Trigger">
<property name="jobDetail" ref="taskA" />
<property name="startDelay" value="0" />
<property name="repeatInterval" value="10000" />
</bean>
<bean id="taskBTrigger" class="org.quartz.Trigger">
<property name="jobDetail" ref="taskB" />
<property name="startDelay" value="0" />
<property name="repeatInterval" value="15000" />
</bean>
public class TaskDependencyListener extends JobListenerSupport {
private JobKey dependentJobKey;
public TaskDependencyListener(JobKey dependentJobKey) {
this.dependentJobKey = dependentJobKey;
}
@Override
public String getName() {
return "TaskDependencyListener";
}
@Override
public void jobWasExecuted(JobExecutionContext context, JobExecutionException jobException) {
if (context.getJobDetail().getKey().equals(dependentJobKey)) {
try {
// 觸發(fā) TaskB 的執(zhí)行
Scheduler scheduler = (Scheduler) context.getScheduler();
Trigger taskBTrigger = newTrigger()
.withIdentity("taskBTrigger")
.startNow()
.build();
scheduler.scheduleJob(taskBTrigger);
} catch (SchedulerException e) {
e.printStackTrace();
}
}
}
}
<bean id="taskDependencyListener" class="com.example.TaskDependencyListener">
<constructor-arg ref="taskB" />
</bean>
<bean class="org.quartz.JobListenerService">
<property name="jobListener" ref="taskDependencyListener" />
</bean>
現(xiàn)在,當(dāng)你啟動 Spring Quartz 時,TaskA 將首先執(zhí)行。一旦 TaskA 完成,TaskDependencyListener 將監(jiān)聽到 TaskA 的執(zhí)行完成事件,并觸發(fā) TaskB 的執(zhí)行。這樣,我們就實現(xiàn)了任務(wù)依賴。