java - how to suspend job in quartz scheduler?

Java - how to suspend job in quartz scheduler?

To suspend a job in Quartz Scheduler, you can use the pauseJob method. Here's how you can do it:

import org.quartz.*; import org.quartz.impl.StdSchedulerFactory; public class QuartzExample { public static void main(String[] args) throws SchedulerException, InterruptedException { // Create a Scheduler Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); // Start the Scheduler scheduler.start(); // Define the job detail and trigger JobDetail jobDetail = JobBuilder.newJob(MyJob.class) .withIdentity("myJob", "group1") .build(); Trigger trigger = TriggerBuilder.newTrigger() .withIdentity("myTrigger", "group1") .startNow() .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(10).repeatForever()) .build(); // Schedule the job scheduler.scheduleJob(jobDetail, trigger); // Wait for some time Thread.sleep(30000); // Pause the job scheduler.pauseJob(JobKey.jobKey("myJob", "group1")); // Wait for some more time Thread.sleep(30000); // Resume the job scheduler.resumeJob(JobKey.jobKey("myJob", "group1")); // Wait for some more time Thread.sleep(30000); // Shutdown the scheduler scheduler.shutdown(); } public static class MyJob implements Job { @Override public void execute(JobExecutionContext context) throws JobExecutionException { System.out.println("Job executed at: " + context.getFireTime()); } } }

In this example:

  1. We create a Scheduler using StdSchedulerFactory.getDefaultScheduler().
  2. We start the scheduler using scheduler.start().
  3. We define a job detail and trigger using JobBuilder and TriggerBuilder.
  4. We schedule the job using scheduler.scheduleJob(jobDetail, trigger).
  5. After some time, we pause the job using scheduler.pauseJob(JobKey.jobKey("myJob", "group1")).
  6. After some more time, we resume the job using scheduler.resumeJob(JobKey.jobKey("myJob", "group1")).
  7. Finally, we shutdown the scheduler using scheduler.shutdown().

Make sure to handle exceptions properly when working with Quartz Scheduler, as SchedulerException can be thrown during scheduler operations.

Examples

  1. "Quartz Scheduler pause job example"

    Description: Learn how to pause a job using Quartz Scheduler API. Pausing a job temporarily halts its execution without removing it from the scheduler.

    Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); scheduler.pauseJob(jobKey);

  2. "Quartz Scheduler suspend job programmatically"

    Description: Understand how to programmatically suspend a job in Quartz Scheduler. Suspending a job temporarily stops its execution until it's resumed.

    JobDetail jobDetail = JobBuilder.newJob(MyJob.class).build(); Trigger trigger = TriggerBuilder.newTrigger().build(); scheduler.scheduleJob(jobDetail, trigger); scheduler.pauseJob(jobDetail.getKey());

  3. "Quartz Scheduler job suspension API"

    Description: Explore the API methods provided by Quartz Scheduler to suspend jobs. These methods offer control over job execution and enable suspension when needed.

    scheduler.pauseJob(jobKey);

  4. "Java Quartz Scheduler pause job tutorial"

    Description: Follow a step-by-step tutorial on pausing jobs in Quartz Scheduler using Java. This tutorial provides insights into managing job execution flow.

    scheduler.pauseJob(jobKey);

  5. "Quartz Scheduler suspend job example code"

    Description: Access example code demonstrating how to suspend jobs in Quartz Scheduler. This code snippet illustrates the process clearly for easy implementation.

    scheduler.pauseJob(jobKey);

  6. "How to temporarily stop Quartz Scheduler job"

    Description: Learn how to temporarily stop a job in Quartz Scheduler. Suspending a job allows for maintenance tasks or when its execution is not required temporarily.

    scheduler.pauseJob(jobKey);

  7. "Quartz Scheduler pause/resume job programatically"

    Description: Discover how to programmatically pause and resume jobs in Quartz Scheduler. This capability is useful for managing job execution dynamically.

    scheduler.pauseJob(jobKey);

  8. "Java Quartz Scheduler job suspension example"

    Description: Review an example demonstrating how to suspend jobs in Quartz Scheduler using Java. This example aids in understanding the suspension mechanism.

    scheduler.pauseJob(jobKey);

  9. "How to suspend job in Quartz Scheduler Java"

    Description: Understand the process of suspending jobs in Quartz Scheduler using Java. This knowledge is essential for controlling job execution behavior.

    scheduler.pauseJob(jobKey);

  10. "Pause and resume job in Quartz Scheduler Java"

    Description: Learn how to pause and resume jobs in Quartz Scheduler using Java. This functionality provides flexibility in managing job execution flow.

    scheduler.pauseJob(jobKey);

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