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Not possible to get callback on stream completion

See original GitHub issue

In the event of an error that causes the stream to close, it does not seem to be a way to be notified about this, e.g. to shut the application down. The actual Future of the stream is “hidden” inside the Future[TwitterStream] that the streaming client exposes, so the only completion one is notified about is if the initial connect succeeds or fails. Neither does it seem to be any control messages to listen to in this case.

Issue Analytics

State:
Created 6 years ago
Reactions:1
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

nilsgacommented, Oct 16, 2017

What I would like to do is something like:

val streamFuture = client.filterStatuses(tracks = trackTerms)(processTweet)
streamFuture.onComplete(_ => {
  println("Done")
  System.exit(0)
})

But this does not work, since the future that is returned is the connection future, and not the stream future.

0reactions

nilsgacommented, Oct 16, 2017

Maybe. The reason I added this in addition to https://github.com/DanielaSfregola/twitter4s/issues/142 was that I had a very low volume stream, and akka streams reached an idle timeout. Not sure how these low level “protocol” exceptions would propagate to the client.