Posts Tagged ‘SpringBatch’

Case

In SpringBatch, a batch is scheduled in a bean JobScheduler with

@Scheduled(fixedDelay = 60000)
void doSomeThing(){...}

.
How to have different schedules, per environment, for instance: keep the fixedDelay=60000 in prod, but schedule with a Cron expression in local dev?

Solution

Add this block to the <JobScheduler:

	@Value("${jobScheduler.scheduling.enabled:true}")
	private boolean schedulingEnabled;

	@Value("${jobScheduler.scheduling.type:fixedDelay}")
	private String scheduleType;

	@Value("${jobScheduler.scheduling.fixedDelay:60000}")
	private long fixedDelay;

	@Value("${jobScheduler.scheduling.initialDelay:0}")
	private long initialDelay;

	@Value("${jobScheduler.scheduling.cron:}")
	private String cronExpression;

	@Scheduled(fixedDelayString = "${jobScheduler.scheduling.fixedDelay:60000}", initialDelayString = "${jobScheduler.scheduling.initialDelay:0}")
	@ConditionalOnProperty(name = "jobScheduler.scheduling.type", havingValue = "fixedDelay")
	public void scheduleFixedDelay() throws Exception {
		if ("fixedDelay".equals(scheduleType) || "initialDelayFixedDelay".equals(scheduleType)) {
			doSomething();
		}
	}

	@Scheduled(cron = "${jobScheduler.scheduling.cron:0 0 1 * * ?}")
	@ConditionalOnProperty(name = "jobScheduler.scheduling.type", havingValue = "cron", matchIfMissing = false)
	public void scheduleCron() throws Exception {
		if ("cron".equals(scheduleType)) {
			doSomething();		}
	}

In application.yml, add:

jobScheduler:
  # noinspection GrazieInspection
  scheduling:
    enabled: true
    type: fixedDelay
    fixedDelay: 60000
    initialDelay: 0
    cron: 0 0 1 31 2 ? # every 31st of February... which means: never

(note the cron expression: leaving it empty may prevent SpringBoot from starting)

In application.yml, add:

jobScheduler:
  # noinspection GrazieInspection
  scheduling:
    type: cron
    cron: 0 0 1 * * ?

It should work now ;-).