Java ServiceExecutor终止条件 [英] Java ServiceExecutor terminating condition

问题描述

我是java executor的新手。

I'm new to java executor stuff.

我正在使用Java的ExecutorService来启动多个线程来处理数据。

I'm using Java's ExecutorService to launch several threads to process data.

Executor executor = Executors.newFixedThreadPool(poolSize);

for(int i=0; i< 5;i++) executor.execute(new MyRunnable(i));

一旦线程找不到数据，它们就会优雅地终止。

once the threads don't find data, they gracefully terminate.

我的问题是，当所有线程终止时，Executor会发生什么，它是否仍在运行其主线程？或者它将自行终止并且整个应用程序将优雅地完成？

My question is what happens to the Executor when all the threads terminate, is it still running its master thread ? or it will terminate itself and whole application will finish gracefully?

如果执行程序线程仍然运行，我怎么能让它在所有子线程完成后终止（poolSize number线程）。

in case executor thread still runs, how can I let it terminate once all its child threads are done (poolSize number of threads).

推荐答案

执行者将继续在谎言下运行线程池。您仍然可以执行或提交新任务。建议关闭Executor服务调用 ExecutorService.html #shutdown（），它会尝试停止所有正在执行的任务，停止等待任务的处理，并返回一个列表正在等待执行的任务。

Executor will keep running with it under lying thread pool. you can still execute or submit a new task. It is recommended to shutdown Executor service call ExecutorService.html#shutdown() which attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.

您还可以使用 ExecutorService.html＃shutdownNow（）停止所有正在执行的操作任务，停止等待任务的处理，并返回等待执行的任务列表。当你需要立即关机时它很有用。

You can also use ExecutorService.html#shutdownNow() which stops all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution. It is useful when you need immediate shutdown.

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