| /* |
| * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
| package kotlinx.coroutines.guide.sync07 |
| |
| import kotlinx.coroutines.* |
| import kotlinx.coroutines.channels.* |
| import kotlin.system.* |
| |
| suspend fun massiveRun(action: suspend () -> Unit) { |
| val n = 100 // number of coroutines to launch |
| val k = 1000 // times an action is repeated by each coroutine |
| val time = measureTimeMillis { |
| coroutineScope { // scope for coroutines |
| repeat(n) { |
| launch { |
| repeat(k) { action() } |
| } |
| } |
| } |
| } |
| println("Completed ${n * k} actions in $time ms") |
| } |
| |
| // Message types for counterActor |
| sealed class CounterMsg |
| object IncCounter : CounterMsg() // one-way message to increment counter |
| class GetCounter(val response: CompletableDeferred<Int>) : CounterMsg() // a request with reply |
| |
| // This function launches a new counter actor |
| fun CoroutineScope.counterActor() = actor<CounterMsg> { |
| var counter = 0 // actor state |
| for (msg in channel) { // iterate over incoming messages |
| when (msg) { |
| is IncCounter -> counter++ |
| is GetCounter -> msg.response.complete(counter) |
| } |
| } |
| } |
| |
| fun main() = runBlocking<Unit> { |
| val counter = counterActor() // create the actor |
| withContext(Dispatchers.Default) { |
| massiveRun { |
| counter.send(IncCounter) |
| } |
| } |
| // send a message to get a counter value from an actor |
| val response = CompletableDeferred<Int>() |
| counter.send(GetCounter(response)) |
| println("Counter = ${response.await()}") |
| counter.close() // shutdown the actor |
| } |