SpringScheduling Shedlock @SchedulerLock Anotasyonu

name Alanı

Bu alan veri tabanındaki name sütununda görülür.

Örnek

Şöyle yaparız

import net.javacrumbs.shedlock.core.SchedulerLock;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class MyScheduledJob {

  /**
    * Define your cron expression, 
    * better if it is on properties configurations
    */
  @Scheduled(cron = "0 0/5 * * * ?")
  @SchedulerLock(name = "myScheduledJobLock") // Provide a unique lock name
  public void scheduledMethod() {
    // Your job logic here
  }
}

Örnek

Şöyle yaparız

@Scheduled(cron = "0 0 * * * *")
@SchedulerLock(name = "myTask")
public void run() {
   // do something
}

Örnek

Şöyle yaparız

@Component
public class SchedulerTask {

  @Scheduled(fixedDelay = 10,timeUnit = TimeUnit.SECONDS)
  @SchedulerLock(name = "someOperation")
  public void someOperation() {
    // To assert that the lock is held (prevents misconfiguration errors)
    LockAssert.assertLocked();
    Logger.getAnonymousLogger().info("In Scheduler");
  }
}

lockAtLeastFor Alanı

Açıklaması şöyle

lockAtLeastFor attribute which specifies minimum amount of time for which the lock should be kept. Its main purpose is to prevent execution from multiple nodes in case of really short tasks and clock difference between the nodes.

Örnek

Şöyle yaparız

@Component
public class TaskScheduler {

  @Scheduled(cron = "0/15 * * * * ?")
  @SchedulerLock(name = "myTask1", lockAtLeastFor = "PT10S", lockAtMostFor = "PT15S")
  public void task1() {
  }

  @Scheduled(cron = "0/15 * * * * ?")
  @SchedulerLock(name = "myTask2", lockAtLeastFor = "PT10S", lockAtMostFor = "PT15S")
  public void task2() {
  }
}

lockAtMostFor Alanı

Açıklaması şöyle

lockAtMostFor we make sure that the lock is released even if the node dies. Please note that lockAtMostFor is just a safety net in case that the node executing the task dies, so set it to a time that is significantly larger than maximum estimated execution time. If the task takes longer than lockAtMostFor, it may be executed again and the results will be unpredictable (more processes will hold the lock).

Örnek

Şöyle yaparız

@Component
public class ScheduledTasks {
  @Scheduled(fixedRateString = "PT5M")
  @SchedulerLock(name="someScheduledTask", lockAtmostFor = "PT2M",
 lockAtLeastFor = "PT1M")
  public void someScheduledTask() {
    //Task runs every 5 minutes
  }
}