Don't rethrow the InterruptedException to allow shutdown cycle to start if
main is interrupted (a sort of SIGNAL)
import sun.misc.Signal;
import java.util.concurrent.CountDownLatch;
public class SignalBarrier {
final CountDownLatch latch = new CountDownLatch(1);
public SignalBarrier() {
Signal.handle(new Signal("INT"), (signal) -> signal());
}
public void signal() {
latch.countDown();
}
public void await() {
try {
latch.await();
} catch (InterruptedException ignored) {
}
}
}
On Monday, December 5, 2016 at 3:07:38 PM UTC, Guido Medina wrote:
>
> Cleaner version, you can see now that you can signal() the barrier via
> SIGTERM or manually:
> import sun.misc.Signal;
>
> import java.util.concurrent.CountDownLatch;
>
> public class SignalBarrier {
>
> final CountDownLatch latch = new CountDownLatch(1);
>
> public SignalBarrier() {
> Signal.handle(new Signal("INT"), (signal) -> signal());
> }
>
> public void signal() {
> latch.countDown();
> }
>
> public void await() {
> try {
> latch.await();
> } catch (InterruptedException e) {
> throw new RuntimeException(e);
> }
> }
> }
>
> Notice that CountDownLatch is idempotent once it reaches zero.
>
> HTH,
>
> Guido.
>
> On Monday, December 5, 2016 at 3:00:51 PM UTC, Guido Medina wrote:
>>
>> I have created my own version where I can simply signal if I want to
>> shutdown from another place instead of signalling the process, the
>> following support both:
>>
>> import sun.misc.Signal;
>>
>> import java.util.concurrent.CountDownLatch;
>>
>> public class SignalBarrier {
>>
>> final CountDownLatch latch = new CountDownLatch(1);
>>
>> public SignalBarrier() {
>> Signal.handle(new Signal("INT"), (signal) -> latch.countDown());
>> }
>>
>> public void signal() {
>> latch.countDown();
>> }
>>
>> public void await() {
>> try {
>> latch.await();
>> } catch (InterruptedException e) {
>> throw new RuntimeException(e);
>> }
>> }
>> }
>>
>>
>>
>> On Tuesday, November 29, 2016 at 7:08:34 PM UTC, Marek Żebrowski wrote:
>>>
>>> Thanks for detailed explanation. I'll try to adapt it to my system.
>>>
>>
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
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