Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-2017 JetBrains s.r.o. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
Roman Elizarov | a9687a3 | 2018-06-29 17:28:38 +0300 | [diff] [blame] | 18 | package kotlinx.coroutines.experimental.guide.select01 |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 19 | |
| 20 | import kotlinx.coroutines.experimental.* |
| 21 | import kotlinx.coroutines.experimental.channels.* |
| 22 | import kotlinx.coroutines.experimental.selects.* |
Roman Elizarov | 9fe5f46 | 2018-02-21 19:05:52 +0300 | [diff] [blame] | 23 | import kotlinx.coroutines.experimental.* |
| 24 | import kotlin.coroutines.experimental.* |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 25 | |
Roman Elizarov | 5785720 | 2017-03-02 23:17:25 +0300 | [diff] [blame] | 26 | fun fizz(context: CoroutineContext) = produce<String>(context) { |
| 27 | while (true) { // sends "Fizz" every 300 ms |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 28 | delay(300) |
| 29 | send("Fizz") |
| 30 | } |
| 31 | } |
| 32 | |
Roman Elizarov | 5785720 | 2017-03-02 23:17:25 +0300 | [diff] [blame] | 33 | fun buzz(context: CoroutineContext) = produce<String>(context) { |
| 34 | while (true) { // sends "Buzz!" every 500 ms |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 35 | delay(500) |
| 36 | send("Buzz!") |
| 37 | } |
| 38 | } |
| 39 | |
Roman Elizarov | 5785720 | 2017-03-02 23:17:25 +0300 | [diff] [blame] | 40 | suspend fun selectFizzBuzz(fizz: ReceiveChannel<String>, buzz: ReceiveChannel<String>) { |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 41 | select<Unit> { // <Unit> means that this select expression does not produce any result |
| 42 | fizz.onReceive { value -> // this is the first select clause |
| 43 | println("fizz -> '$value'") |
| 44 | } |
| 45 | buzz.onReceive { value -> // this is the second select clause |
| 46 | println("buzz -> '$value'") |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | fun main(args: Array<String>) = runBlocking<Unit> { |
Roman Elizarov | 43e3af7 | 2017-07-21 16:01:31 +0300 | [diff] [blame] | 52 | val fizz = fizz(coroutineContext) |
| 53 | val buzz = buzz(coroutineContext) |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 54 | repeat(7) { |
Roman Elizarov | 5785720 | 2017-03-02 23:17:25 +0300 | [diff] [blame] | 55 | selectFizzBuzz(fizz, buzz) |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 56 | } |
Roman Elizarov | 8b38fa2 | 2017-09-27 17:44:31 +0300 | [diff] [blame] | 57 | coroutineContext.cancelChildren() // cancel fizz & buzz coroutines |
Roman Elizarov | d4dcbe2 | 2017-02-22 09:57:46 +0300 | [diff] [blame] | 58 | } |