what would be the proper way with kotlin coroutines to signal events (like wait / notify in java)?

# announcements

[Peter Ertl]

what would be the proper way with kotlin coroutines to signal events (like wait / notify in java)?

[Dominaezzz]

Depends, coroutines are more structured, so there are different ways to achieve this.
What are you trying to achieve?

[Peter Ertl]

I have a background process that periodically downloads stuff from the internet but should also be triggerable using an event.

[Peter Ertl]

something like DownloadService.triggerDownload()

[Peter Ertl]

so a user can manually force a download

[Dominaezzz]

Are you planning on passing any parameters?

[Peter Ertl]

no

[Dominaezzz]

In that case you probably want to use a MutableSharedFlow and call tryEmit to signal and collect to listen.

[Peter Ertl]

ok thanks @Dominaezzz I will check that out

[Joel]

@Dominaezzz are there docs for MutableSharedFlow? My biggest gripe about coroutines is that there is so much cool stuff that is not surfaced.

[Dominaezzz]

There's quite a bit of documentation in the API itself.

[Joel]

Yes, if you know where/what to look at 🙂

[Dominaezzz]

On the SharedFlow interface itelf.