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Handle ServerState on Shutdown
May 24, 2013
9:49, EEST
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fred
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Hi,

My Server is running as a Windows Service and I am wondering how to set ServerState to e.g. “SHUTDOWN” when the service is stopped?

Actually, the state according to client is changed to: ServerState changed from Running to CommunicationFault

Is there a listener for shutdown on server?

Thanks
BR

May 24, 2013
12:22, EEST
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Jouni Aro
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UaClient is polling the ServerState (1000 ms by default), so it should notice the change, if you call UaServer.shutdown() with a 5 second delay, for example, when the service is requested to close. How do you run it as service – that’s the next question of course.

If the client fails to read Shutdown state, it will notice the change when the read fails – and it results to CommunicationFault.

May 27, 2013
6:40, EEST
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fred
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Solved this topic by adding a simple ShutdownHook in main method. Btw, I use Tanuki Service Wrapper for starting the server as a service.

Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
server.shutdown(5, new LocalizedText("OPC-UA Server was shutdown", Locale.ENGLISH));
}
});
May 27, 2013
7:45, EEST
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Jouni Aro
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Very good! Thanks for sharing the solution – and the note about Tanuki.

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