shuts down an ExecutorService

最新推荐文章于 2024-01-20 06:00:00 发布

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最新推荐文章于 2024-01-20 06:00:00 发布

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原文链接：http://www.cnblogs.com/zhuqiang/p/3656421.html

本文介绍了一种优雅地关闭Java中的ExecutorService的方法。该方法分为两个阶段：首先调用shutdown()来阻止新任务提交；然后如果有必要，调用shutdownNow()取消剩余的任务。此过程确保了资源的有效释放。

shuts down an ExecutorService in two phases, first by calling shutdown to reject incoming tasks, and then calling shutdownNow, if necessary, to cancel any lingering tasks:

 void shutdownAndAwaitTermination(ExecutorService pool) {
   pool.shutdown(); // Disable new tasks from being submitted
   try {
     // Wait a while for existing tasks to terminate
     if (!pool.awaitTermination(60, TimeUnit.SECONDS)) {
       pool.shutdownNow(); // Cancel currently executing tasks
       // Wait a while for tasks to respond to being cancelled
       if (!pool.awaitTermination(60, TimeUnit.SECONDS))
           System.err.println("Pool did not terminate");
     }
   } catch (InterruptedException ie) {
     // (Re-)Cancel if current thread also interrupted
     pool.shutdownNow();
     // Preserve interrupt status
     Thread.currentThread().interrupt();
   }
 }