Roman Elizarov | f16fd27 | 2017-02-07 11:26:00 +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 | |
Roman Elizarov | b7721cf | 2017-02-03 19:23:08 +0300 | [diff] [blame] | 17 | // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
| 18 | package guide.channel.example04 |
| 19 | |
Roman Elizarov | 9669578 | 2017-10-01 10:48:15 -0700 | [diff] [blame^] | 20 | import kotlinx.coroutines.experimental.* |
| 21 | import kotlinx.coroutines.experimental.channels.* |
Roman Elizarov | b7721cf | 2017-02-03 19:23:08 +0300 | [diff] [blame] | 22 | |
Roman Elizarov | 66f018c | 2017-09-29 21:39:03 +0300 | [diff] [blame] | 23 | fun produceNumbers() = produce<Int> { |
Roman Elizarov | b7721cf | 2017-02-03 19:23:08 +0300 | [diff] [blame] | 24 | var x = 1 |
| 25 | while (true) send(x++) // infinite stream of integers starting from 1 |
| 26 | } |
| 27 | |
Roman Elizarov | 66f018c | 2017-09-29 21:39:03 +0300 | [diff] [blame] | 28 | fun square(numbers: ReceiveChannel<Int>) = produce<Int> { |
Roman Elizarov | b7721cf | 2017-02-03 19:23:08 +0300 | [diff] [blame] | 29 | for (x in numbers) send(x * x) |
| 30 | } |
| 31 | |
| 32 | fun main(args: Array<String>) = runBlocking<Unit> { |
| 33 | val numbers = produceNumbers() // produces integers from 1 and on |
| 34 | val squares = square(numbers) // squares integers |
| 35 | for (i in 1..5) println(squares.receive()) // print first five |
| 36 | println("Done!") // we are done |
| 37 | squares.cancel() // need to cancel these coroutines in a larger app |
| 38 | numbers.cancel() |
| 39 | } |