TIL-Lab49/Ensuring only one Quartz scheduled job runs at one time

quartz-one-job.md

With the advances in Lambda and ECS task scheduling, I have not needed to use the trusty Quartz library for the past few years. I recently had to use it though in a project, and realized that the next job was starting when the current job was still running.

Thankfully with Spring, Quartz 2 makes this really easy. Just add the @DisallowConcurrentExecution to your job.

package com.lab49.example;

import org.quartz.DisallowConcurrentExecution;
import org.quartz.job;
import org.quartz.job.JobExecutionContext;

@DisallowConcurrentExecution 
public class TestJob implements Job {

  @Override
  public void execute(JobExecutionContext context) {
    // job logic here
  }
}