Suggestion for an addition to the Effect type

[ghost]

Hey folks, I'd like to suggest that you add support for effect time-outs.

Say that I have an effect that makes an API call that could hang for a while. It would be nice if it could be automatically cancelled after some user-defined time has run without getting a response, possibly firing a user-defined action so that the reducer can respond to the original effect having timed out.

Many thanks!

[mbrandonw]

Hi @wtruppel, since Effect conforms to the Publisher protocol from Combine, you have access to all of the operators that Combine provides. In particular, there is a timeout operators that does just this.

You could use it like so:

case .buttonTapped:
  return environment.apiClient.fetch()
    .timeout(5, scheduler: environment.mainQueue)
    .catchToEffect()

You can also use the customError option of timeout to throw a specific error when the deadline is reached, and then use that in the reducer to execute logic for the timeout.

Also, if you use a TestScheduler in your tests you will be able to write tests that prove your timeout logic works as you expect. 🙂

[ghost]

Ah, awesome! Many thanks for the reply. 👍