在所有提交的任务无阻塞地完成后关闭 Java 执行器

Question

我想知道是否有办法关闭 Java ExecutorService 并允许所有提交的任务在不阻塞的情况下完成。

更具体地说，我想安排一个 Runnable 延迟并继续代码，而不需要保留对 ExecutorService 的引用才能将其关闭.

以下代码将终止提交的任务，因为它尚未开始：

ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
executor.schedule(runnable, delay, TimeUnit.MILLISECONDS);
executor.shutdown();
...

虽然此代码将阻塞直到任务完成：

ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
executor.schedule(runnable, delay, TimeUnit.MILLISECONDS);
executor.awaitTermination(timeout, TimeUnit.MILLISECONDS);
...

我想要这样的东西：

ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
executor.schedule(runnable, delay, TimeUnit.MILLISECONDS);
executor.shutdownAfterTerminationWithoutBlocking();
...
code that runs without waiting

我知道可以使用 Timer 但我想知道是否可以使用 ExecutorService

Answer 1

ExecutorService.shutdown javadoc 说：

Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.

因此将执行已提交但尚未开始的任务。正是您所需要的。

在所有提交的任务无阻塞地完成后关闭 Java 执行器

Shutdown Java Executor After All Submitted Tasks Finished Without Blocking

java

executorservice

scheduledexecutorservice

java-threads