Hi, I want to execute N tasks in a pool of K corou...

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[Anton Lakotka [JB]]

Hi, I want to execute N tasks in a pool of K coroutines. How can I do that?
I mean:

val todos = (0..1000000).map { payload -> someTaskBuilder(payload) }
// On runtime JVM will try to execute as much as it can at the same time.
val results = todos.map { task -> async { task() } }.awaitAll()
// But I want to confine total amount of running coroutines here.
// Something like this:
coroutineScope ( someContextWithCoroutinesLimit ) {
   /* todos execution */
}

Maybe I want something strange.
The reason why I want that is an external system which does some work during task execution. And that external system has Connection Limit. I could fix that by using some Pool. But I was wondering is it possible to limit somehow coroutines amount in easy way.

[Pavlo Liapota]

I guess you want to limit number of threads on which your coroutines will be executed?

Look at
https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/new-fixed-thread-pool-context.html
https://github.com/Kotlin/kotlin-coroutines-examples/blob/master/examples/context/pool-example.kt

Also try asking in #C1CFAFJSK