我正在制作项目,从多个协同例程中消耗并推回到resultChannel。制作人在最后一个项目后关闭其频道。
代码永远不会结束,因为resultChannel永远不会被关闭。如何检测并正确完成迭代,以便hasNext()
返回false
?
val inputData = (0..99).map { "Input$it" }
val threads = 10
val bundleProducer = produce<String>(CommonPool, threads) {
inputData.forEach { item ->
send(item)
println("Producing: $item")
}
println("Producing finished")
close()
}
val resultChannel = Channel<String>(threads)
repeat(threads) {
launch(CommonPool) {
bundleProducer.consumeEach {
println("CONSUMING $it")
resultChannel.send("Result ($it)")
}
}
}
val iterator = object : Iterator<String> {
val iterator = resultChannel.iterator()
override fun hasNext() = runBlocking { iterator.hasNext() }
override fun next() = runBlocking { iterator.next() }
}.asSequence()
println("Starting interation...")
val result = iterator.toList()
println("finish: ${result.size}")
答案 0 :(得分:4)
您可以运行一个等待消费者完成的协程,然后关闭fill = "x"
。
首先,重写启动使用者的代码以保存resultChannel
:
Job
然后在完成所有val jobs = (1..threads).map {
launch(CommonPool) {
bundleProducer.consumeEach {
println("CONSUMING $it")
resultChannel.send("Result ($it)")
}
}
}
后运行另一个关闭通道的协程:
Job