✅ Allow custom resource cleanup e.g. close a db-connection if graceful-shutdown is configured

[HeikoOsigus]

I'd like to cleanup my resources on graceful-shutdown. Therefore i suggest to configure a callback that is called once the server is closed and before the process is exited.

[RobinTail]

what would happen to resources if you don't clean them up before the process exits, @HeikoOsigus ?
I mean... if the process exits... aren't they going to be cleaned up anyway along with that process?

[HeikoOsigus]

Well i think, that depends on the resource.
Another example: gracefully stop a worker thread - which is doing some heavy calculations triggered on previous requests by sending a stop message to the worker thread to prevent corrupt data. Than the application could wait until the worker thread sends the "exit" event before calling process.exit() in the terminationListener.

[RobinTail]

@HeikoOsigus , check out this implementation and let me know if it would suit your needs: #2655
Let me know if you need any arguments on that hook, such as logger or something.

[HeikoOsigus]

That would perfectly suit my needs. Thanks for the fast response!

[RobinTail]

🚀 v23.6.0, @HeikoOsigus