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androidretrofitkotlin-coroutines

Zip network requests via Kotlin Coroutine Flow


I have a code which zips two network requests via RxJava:

Single.zip(repository.requestDate(), repository.requestTime()) {
  date, time -> Result(date, time)
}

it means that repository.requestDate()/repository.requestTime() returns Single<T>

If I want to use Coroutines I need to change requests to:

@GET('link/date')
suspend fun requestDate() : Date

@GET('link/time')
suspend fun requestTime() : Time

But, How can I zip requests via Flow from Kotlin Coroutines?

I know that I can do it like this:

coroutineScope {
   val date = repository.requestDate()
   val time = repository.requestTime()
   Result(date, time)
}

But I want to do it via Flow!

I know about Channels, but Channels.zip() is deprecated.


Solution

  • val dateFlow = flowOf(repository.requestDate())
    val timeFlow = flowOf(repository.requestTime())
    val zippedFlow = dateFlow.zip(timeFlow) { date, time -> Result(date, time) }
    

    https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/zip.html