Hello Orbiters. Quick question. What would be the easy way to achieve retry 3 times for a given netw...

# orbit-mvi

[expensivebelly]

Hello Orbiters. Quick question. What would be the easy way to achieve retry 3 times for a given network request while showing to the user First/Second/Third retry attempt and then either fail or succeed at that point? Thanks

[kioba]

Are you looking for automatic retry or user interaction retry?

[expensivebelly]

Automatic retry

[kioba]

perform("something")
  .on<ASD>
  .transform{  NetworkCallWithRetryAndStartWith() }
  .reduce{}

[kioba]

or you could use loopback

perform("network")
  .on(
Event::class.java,
ErrorEvent::class.java
)
  .transform{  Network() }
  .loopBack{ if( error && event.count < 3) ErrorEvent else SuccessEvent }

perform("error show")
  .on(ErrorEvent::class.java)
  .reduce{ error }

perform("success show")
  .on(SuccessEvent::class.java)
  .reduce{ Success }

[expensivebelly]

Cool thanks, I'll have a look at that loopback

[expensivebelly]

Can you use that for asynchronous sources as well, like, let's say I want to retry 3 times but only when there's network connection?

Kind of what you can do with retryWhen

[kioba]

I would suggest to keep this in the transformer 🙂

[kioba]

We get to work with the Rx Operators in the transformer which is powerful enough to handle all the cases.

Orbit with .transform {}, .reduce{} ,.loopback{} keeps the MVI pattern clear and super easy to read but does not replace the RxStream