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

Here is an example where we can stop , start , and list also all the scheduled running tasks:

@RestController
@RequestMapping("/test")
public class TestController {

private static final String SCHEDULED_TASKS = "scheduledTasks";

@Autowired
private ScheduledAnnotationBeanPostProcessor postProcessor;

@Autowired
private ScheduledTasks scheduledTasks;

@Autowired
private ObjectMapper objectMapper;

@GetMapping(value = "/stopScheduler")
public String stopSchedule(){
    postProcessor.postProcessBeforeDestruction(scheduledTasks, SCHEDULED_TASKS);
    return "OK";
}

@GetMapping(value = "/startScheduler")
public String startSchedule(){
    postProcessor.postProcessAfterInitialization(scheduledTasks, SCHEDULED_TASKS);
    return "OK";
}

@GetMapping(value = "/listScheduler")
public String listSchedules() throws JsonProcessingException{
    Set<ScheduledTask> setTasks = postProcessor.getScheduledTasks();
    if(!setTasks.isEmpty()){
        return objectMapper.writeValueAsString(setTasks);
    }else{
        return "No running tasks !";
    }
 }
}

Option 1: Using a post processor

Supply ScheduledAnnotationBeanPostProcessor and explicitly invoke postProcessBeforeDestruction(Object bean, String beanName), for the bean whose scheduling should be stopped.

Option 2: Maintaining a map of target beans to its Future

private final Map<Object, ScheduledFuture<?>> scheduledTasks =
        new IdentityHashMap<>();

@Scheduled(fixedRate = 2000)
public void fixedRateJob() {
    System.out.println("Something to be done every 2 secs");
}

@Bean
public TaskScheduler poolScheduler() {
    return new CustomTaskScheduler();
}

class CustomTaskScheduler extends ThreadPoolTaskScheduler {

    @Override
    public ScheduledFuture<?> scheduleAtFixedRate(Runnable task, long period) {
        ScheduledFuture<?> future = super.scheduleAtFixedRate(task, period);

        ScheduledMethodRunnable runnable = (ScheduledMethodRunnable) task;
        scheduledTasks.put(runnable.getTarget(), future);

        return future;
    }

    @Override
    public ScheduledFuture<?> scheduleAtFixedRate(Runnable task, Date startTime, long period) {
        ScheduledFuture<?> future = super.scheduleAtFixedRate(task, startTime, period);

        ScheduledMethodRunnable runnable = (ScheduledMethodRunnable) task;
        scheduledTasks.put(runnable.getTarget(), future);

        return future;
    }
}

When the scheduling for a bean has to be stopped, you can lookup the map to get the corresponding Future to it and explicitly cancel it.