[英]Kotlin withTimeout does not work in Intellij gradle project
Run following code give me the wrong results:运行以下代码给我错误的结果:
code代码
import kotlinx.coroutines.*
fun timeElapsed(nano: Long, msg: String){
println("$msg milliseconds: ${(System.nanoTime()-nano)/1000000}")
}
suspend fun main(): Unit = coroutineScope {
val start = System.nanoTime()
withTimeout(700) {
println("in timout")
timeElapsed(start, "timeout before delay")
delay(900)
println("not show?")
}
}
wrong result错误的结果
in timout
timeout before delay milliseconds: 16
not show?
Exception in thread "main" kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 700 ms
run on https://play.kotlinlang.org/ give me the expected result:在https://play.kotlinlang.org/上运行给我预期的结果:
in timout
timeout before delay milliseconds: 27
Exception in thread "main" kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 700 ms
My gradle setup我的 gradle 设置
plugins {
id 'org.jetbrains.kotlin.jvm' version '1.6.21'
id 'org.jetbrains.kotlin.plugin.serialization' version '1.6.21'
}
group 'intro-coroutines'
version '1.0-SNAPSHOT'
repositories {
mavenCentral()
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib"
implementation "org.jetbrains.kotlin:kotlin-reflect"
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.2")
def coroutines_version = '1.6.1'
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-swing:$coroutines_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:$coroutines_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-slf4j:$coroutines_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-debug:$coroutines_version"
Intellij version: Build #IU-221.5080.210, built on April 11, 2022 Intellij 版本:Build #IU-221.5080.210,于 2022 年 4 月 11 日构建
kotline plugin version: 221-1.7.0-Beta-release-135-IJ5080.210 kotline 插件版本:221-1.7.0-Beta-release-135-IJ5080.210
Java SDK: JavaSE-1.8 Java SDK:JavaSE-1.8
what could possibly go wrong? go 可能有什么问题?
finally, I figured out why, totally my fault:最后,我弄清楚了原因,完全是我的错:
I define a delay() function in another Kotlin file in the same package as follows:我在同一个 package 的另一个 Kotlin 文件中定义了一个 delay() function 如下:
suspend fun delay(timeMillis: Long): Unit =
suspendCoroutine { cont ->
executor.schedule({
cont.resume(Unit)
}, timeMillis, TimeUnit.MILLISECONDS)
}
As this continuation is a non-cancellable one, so delay is not cancellable, Sorry: lesson learned, function should be private, and check the import!由于此延续是不可取消的,因此延迟不可取消,对不起:吸取教训,function 应该是私有的,并检查导入!
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