| /* |
| * Copyright 2016-2017 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
| package guide.sync.example07 |
| |
| import kotlinx.coroutines.experimental.* |
| import kotlin.coroutines.experimental.CoroutineContext |
| import kotlin.system.measureTimeMillis |
| import kotlinx.coroutines.experimental.channels.* |
| |
| suspend fun massiveRun(context: CoroutineContext, action: suspend () -> Unit) { |
| val n = 1000 // number of coroutines to launch |
| val k = 1000 // times an action is repeated by each coroutine |
| val time = measureTimeMillis { |
| val jobs = List(n) { |
| launch(context) { |
| repeat(k) { action() } |
| } |
| } |
| jobs.forEach { it.join() } |
| } |
| 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 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(args: Array<String>) = runBlocking<Unit> { |
| val counter = counterActor() // create the actor |
| massiveRun(CommonPool) { |
| 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 |
| } |