How to stop a scheduled task that was started using @Scheduled annotation?

Question

I have created a simple scheduled task using Spring Framework\'s @Scheduled annotation.

 @Scheduled(fixedRate = 2000)
 public void doSomething() {}
         


        

Answer 1

Scheduled

When spring process Scheduled, it will iterate each method annotated this annotation and organize tasks by beans as the following source shows:

private final Map> scheduledTasks =
        new IdentityHashMap>(16);

Cancel

If you just want to cancel the a repeated scheduled task, you can just do like following (here is a runnable demo in my repo):

@Autowired
private ScheduledAnnotationBeanPostProcessor postProcessor;
@Autowired
private TestSchedule testSchedule;

public void later() {
    postProcessor.postProcessBeforeDestruction(test, "testSchedule");
}

Notice

It will find this beans's ScheduledTask and cancel it one by one. What should be noticed is it will also stopping the current running method (as postProcessBeforeDestruction source shows).

    synchronized (this.scheduledTasks) {
        tasks = this.scheduledTasks.remove(bean); // remove from future running
    }
    if (tasks != null) {
        for (ScheduledTask task : tasks) {
            task.cancel(); // cancel current running method
        }
    }