Spring Batch: Running Batch Jobs Asynchronously

Mar 11, 2023
Batch Processing

When running multiple batch jobs in Spring Batch, the default JobLauncher waits to launch a job until the previous job running is COMPLETE. In order to run multiple batch jobs simultaneously, the JobLauncher must be configured to run jobs asynchronously.

Configure the async job launcher


public JobLauncher customJobLauncher(@Autowired final JobRepository jobRepository) {
    final SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
    jobLauncher.setJobRepository(jobRepository);

    // Here we configure the async task executer
    jobLauncher.setTaskExecutor(new SimpleAsyncTaskExecutor());
    jobLauncher.afterPropertiesSet();
    return jobLauncher;
}

Run a job with the asyc job launcher

public class BatchJobScheduler {

    @Autowired
    private JobLauncher customJobLauncher;

    @Autowired
    private Job customJob;

    @Scheduled(cron="* * 1 * * *")
    public BatchStatus scheduleJob() {
        final JobExecution ex = customJobLauncher.runJob(customJob, getJobParameters());
        return ex.getStatus();
    }

    JobParameters getJobParameters() {
        // Get the job parameters
    }
}