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/*
* Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.examples
import kotlinx.coroutines.*
import kotlinx.coroutines.future.*
import java.util.concurrent.*
fun main(args: Array<String>) {
// this example shows how easy it is to perform multiple async operations with coroutines
val future = GlobalScope.future {
(1..5).map { // loops are no problem at all
startLongAsyncOperation(it).await() // suspend while the long method is running
}.joinToString("\n")
}
println("We have a long-running computation in background, let's wait for its result...")
println(future.get())
}
fun startLongAsyncOperation(num: Int): CompletableFuture<String> =
CompletableFuture.supplyAsync {
Thread.sleep(1000L) // imitate some long-running computation, actually
"$num" // and return a number converted to string
}
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