kotlinx-coroutines-core/src/test/kotlin/guide/example-select-01.kt

/*
 * 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.*

val fizz = produce<String>(CommonPool) { // produce using common thread pool
    while (true) {
        delay(300)
        send("Fizz")
    }
}

val buzz = produce<String>(CommonPool) {
    while (true) {
        delay(500)
        send("Buzz!")
    }
}

suspend fun selectFizzBuzz() {
    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> {
    repeat(7) {
        selectFizzBuzz()
    }
}