线程池-isShutdown和isTerminated

来源：互联网发布：印度冷战作用知乎编辑：程序博客网时间：2024/06/03 15:34

1.线程池 isShutdown和isTerminated的区别

isShutDown当调用shutdown()方法后返回为true。
isTerminated当调用shutdown()方法后，并且所有提交的任务完成后返回为true

线程池任务正常完成，都为false

package com.cweeyii.threadpool;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;/** * Created by wenyi on 16/10/16. * Email:caowenyi@meituan.com */public class ShutDownWait {    private static final Logger LOGGER = LoggerFactory.getLogger(ShutDownWait.class);    public static void main(String[] args) throws InterruptedException {        int workerNum = 2;        ExecutorService executorService = Executors.newFixedThreadPool(workerNum);        for (int i = 0; i < workerNum; i++) {            executorService.submit(new SleepWorker());        }        //executorService.shutdown();        //LOGGER.info("shutdown=" + executorService.isShutdown() + " terminate=" + executorService.isTerminated());        executorService.awaitTermination(10, TimeUnit.SECONDS);        LOGGER.info("shutdown="+executorService.isShutdown()+" terminate="+executorService.isTerminated());        LOGGER.info("调用shutdown会立即返回不会等待线程池任务执行完");    }}

12:56:58.849  INFO (SleepWorker.java:31) - threadName=pool-1-thread-1 线程结束null工作12:56:58.849  INFO (SleepWorker.java:31) - threadName=pool-1-thread-2 线程结束null工作12:57:06.843  INFO (ShutDownWait.java:26) - shutdown=false terminate=false12:57:06.846  INFO (ShutDownWait.java:27) - 调用shutdown会立即返回不会等待线程池任务执行完

取消注释后结果：13:57:08.518  INFO (ShutDownWait.java:24) - shutdown=true terminate=false13:57:10.523  INFO (SleepWorker.java:31) - threadName=pool-1-thread-1 线程结束null工作13:57:10.523  INFO (SleepWorker.java:31) - threadName=pool-1-thread-2 线程结束null工作13:57:10.526  INFO (ShutDownWait.java:26) - shutdown=true terminate=true13:57:10.527  INFO (ShutDownWait.java:27) - 调用shutdown会立即返回不会等待线程池任务执行完

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