Hi all is it possible to register shutdown hooks o...

# koin

[Vinicius Carvalho]

Hi all is it possible to register shutdown hooks on beans created by koin? During my application shutdown I'd like to some of my beans to have a method invoke to clean up resources

[arnaud.giuliani]

no shutdown hook in current 2.0 beta

[arnaud.giuliani]

you need to be notified before closing resources?

[Vinicius Carvalho]

Yes, as part of lifecycle management

[Vinicius Carvalho]

let me give you a real example

[Vinicius Carvalho]

During startup we create google cloud pubsub subscriptions for services

[Vinicius Carvalho]

when application stops we should delete those resources

[Vinicius Carvalho]

I come from Spring (as developer and committer) and it's one thing I'm missing in koin at the moment

[Vinicius Carvalho]

Another thing I noticed is that the ktor extension does not really calls the stop

[Vinicius Carvalho]

which seems to be possible by listening to ktor events

[Vinicius Carvalho]

so when someone kills the server, it bubbles up events that koin context could close the context, and therefore invoke any resource "destroy" functions

[arnaud.giuliani]

@Vinicius Carvalho yeah sure, please open a feature proposal for 2.0 👍

[arnaud.giuliani]

a way to hook on koin shutdown if I understand well

[Vinicius Carvalho]

Sure I'll open two feature requests, see if they make sense 🙂

[Vinicius Carvalho]

So I opened two issues

[Vinicius Carvalho]

the destroy one could be a destroy: T.()->Unit function that is passed to the factories, and during closing they could invoke it

[Vinicius Carvalho]

I honestly have not look too much inside koin code, but I'd assume that a dependency graph would take care of the order of which components are destroyed