Kotlin flow withTimeout repeat

阳光穿透心脏的1/2处 2023-10-14 13:26 48阅读 0赞

import kotlinx.coroutines.*
    import kotlinx.coroutines.flow.flow
    import kotlinx.coroutines.flow.onCompletion
    import kotlinx.coroutines.flow.onEach
    import kotlinx.coroutines.flow.onEmpty
    
    fun main() {
        runBlocking {
            val fa = flow {
                withTimeout(5000) {
                    repeat(3) {
                        delay(1000)
                        emit(it)
                    }
                }
            }.onEach {
                println("a-onEach-$it")
            }.onCompletion {
                println("a onCompletion")
            }.onEmpty {
                println("a onEmpty")
            }.collect {
                println("a-$it")
            }
    
            val fb = flow {
                withTimeout(2000) {
                    repeat(3) {
                        delay(1000)
                        emit(it)
                    }
                }
            }.onEach {
                println("b-onEach-$it")
            }.onCompletion {
                println("b onCompletion")
            }.onEmpty {
                println("b onEmpty")
            }.collect {
                println("b-$it")
            }
        }
    }

> a-onEach-0  
> a-0  
> a-onEach-1  
> a-1  
> a-onEach-2  
> a-2  
> a onCompletion  
> b-onEach-0  
> b-0  
> b onCompletion  
> Exception in thread "main" kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 2000 ms  
> at kotlinx.coroutines.TimeoutKt.TimeoutCancellationException(Timeout.kt:184)  
> at kotlinx.coroutines.TimeoutCoroutine.run(Timeout.kt:154)  
> at kotlinx.coroutines.EventLoopImplBase$DelayedRunnableTask.run(EventLoop.common.kt:508)  
> at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)  
> at kotlinx.coroutines.DefaultExecutor.run(DefaultExecutor.kt:108)  
> at java.base/java.lang.Thread.run(Thread.java:1623)
> 
> Process finished with exit code 1

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