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Editorial Team
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Asked: 2026-05-27T23:02:57+00:00

I have a background task that I run using the ScheduledThreadPoolExecutor with code like

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I have a background task that I run using the ScheduledThreadPoolExecutor with code like this.

executor.scheduleWithFixedDelay(new BackgroundSync(), 0, 15, TimeUnit.MINUTES);

BackgroundSync implements Runnable.

Sometimes from a user event I want the delayed event to run now and not when the 15 minute timer goes off.

Some requirements:

  • There should only be one “BackgroundSync” running at a time
  • Based off an user event I should be able to schedule a BackgroundSync immediately IF its not running already.
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1 Answer

  1. Editorial Team

    scheduleWithFixedDelay returns a ScheduledFuture. When calling it, store this somewhere and check if it exists if you want to do the immediate execution. Then you can cancel the scheduled future using the cancel method and schedule your runnable again for immediate execution.

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