| /* |
| * 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.select.example01 |
| |
| import kotlinx.coroutines.experimental.* |
| import kotlinx.coroutines.experimental.channels.* |
| import kotlinx.coroutines.experimental.selects.* |
| import kotlinx.coroutines.experimental.* |
| import kotlin.coroutines.experimental.* |
| |
| fun fizz(context: CoroutineContext) = produce<String>(context) { |
| while (true) { // sends "Fizz" every 300 ms |
| delay(300) |
| send("Fizz") |
| } |
| } |
| |
| fun buzz(context: CoroutineContext) = produce<String>(context) { |
| while (true) { // sends "Buzz!" every 500 ms |
| delay(500) |
| send("Buzz!") |
| } |
| } |
| |
| suspend fun selectFizzBuzz(fizz: ReceiveChannel<String>, buzz: ReceiveChannel<String>) { |
| select<Unit> { // <Unit> means that this select expression does not produce any result |
| fizz.onReceive { value -> // this is the first select clause |
| println("fizz -> '$value'") |
| } |
| buzz.onReceive { value -> // this is the second select clause |
| println("buzz -> '$value'") |
| } |
| } |
| } |
| |
| fun main(args: Array<String>) = runBlocking<Unit> { |
| val fizz = fizz(coroutineContext) |
| val buzz = buzz(coroutineContext) |
| repeat(7) { |
| selectFizzBuzz(fizz, buzz) |
| } |
| coroutineContext.cancelChildren() // cancel fizz & buzz coroutines |
| } |