Java perform final action upon program termination?

Question

I'm prototyping a concurrent/distributed system in Java. When a process is terminated (e.g. ctrl+c on command line or red button in Eclipse) I would like to broadcast a message to the other processes (one final method) before it goes away. Tried doing it with finalize() but to no avail. Just pure java with threads, sockets, and a main loop. Thanks.

See http://stackoverflow.com/questions/914666/how-to-capture-system-exit-event — bithead61, Feb 22 '12 at 20:46

score 7 · Accepted Answer · answered Feb 22 '12 at 20:45

Have you tried using Runtime.addShutdownHook?

Note the part in the documentation indicating that sometimes the JVM may abort without running shutdown hooks - this should be used as part of graceful shutdown, but shouldn't be assumed to always run. (Imagine if your network is suddenly cut off, for example - you can't broadcast a goodbye message in that case.)

score 2 · Answer 2 · answered Feb 22 '12 at 20:46

2

Runtime.addShutdownHook() is what you're looking for.

answered Feb 22 '12 at 20:46

Michael Borgwardt

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score 1 · Answer 3 · answered Feb 22 '12 at 20:46

1

You can use Runtime.addShutdownHook().

answered Feb 22 '12 at 20:46

hmjd

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score 0 · Answer 4 · answered Feb 22 '12 at 21:06

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Runtime.addShutdownHook() is what you want. This is only runs if the JVM is shutdowns normally

answered Feb 22 '12 at 21:06

Bilal Syed Hussain

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Java perform final action upon program termination?

4 Answers4