Sleep but Release lock

Question

I want to write a code block where I want my thread to sleep for say 10 minutes. I can do it via Thread.sleep().

But, I want to release the acquired lock. So other thread can use it. I may use object.wait() in this situation. But I can't as other thread that acquire lock does notify() after processing. So my thread is woke up again may be prior to 10 minutes.

What I need is exact sleep of 10 minutes and Also, I do not want to hold lock. So that other threads may use it.

Please assist. Thanks

reacquire lock only after sleep of anticipated time (say 10 min). If any other thread calls notify then also I do not want sleeping thread to wake prior 10min expiration. — dinesh028, Mar 11 '15 at 11:07
Basically I wan't to wait and release the lock. But wake up ony after expiration of sleep time no matters if other threads call notify. — dinesh028, Mar 11 '15 at 11:09
Why don't you simply release the lock before sleeping like I suggested? — assylias, Mar 11 '15 at 11:10
Sleep outside of the synchronized block. Then open a new synchronized block (re-acquire lock). — Brett Okken, Mar 11 '15 at 11:11
Use `notify` --> `Thread#Sleep()` --> Sleep Completed --> `Reaquire lock` — Neeraj Jain, Mar 11 '15 at 11:27
and Read this [Difference between wait() and sleep()](http://stackoverflow.com/a/1036763/3143670) — Neeraj Jain, Mar 11 '15 at 11:31
@assylias - Thanks got your point. Just one thing which is better, I mean another way can be to call while(true){ if(!condition) {obj.wait()}}.. or simply like you put it sync(obj){} sleep() sync(obj){} — dinesh028, Mar 11 '15 at 11:32

fps · Accepted Answer · 2015-03-11T11:31:16.203

Use a ScheduledExecutorService.

ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);

scheduler.schedule(runnableTask, 10, TimeUnit.MINUTES);

where runnableTask is an instance of a class that implements Runnable and has the code you want to run in its run() method.

If you need that your code returns a value, use a Callable instead of a Runnable.

You might want to use a synchronized block with a lock in your code or any other concurrency construction to avoid that more than one thread runs your code concurrently.

Sleep but Release lock

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