/**
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* Copyright (c) 2005-2012 springside.org.cn
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*/
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package com.jeeplus.common.utils;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.TimeUnit;
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/**
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* 线程相关工具类.
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* @author calvin
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* @version 2013-01-15
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*/
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public class Threads {
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/**
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* sleep等待,单位为毫秒,忽略InterruptedException.
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*/
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public static void sleep(long millis) {
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try {
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Thread.sleep(millis);
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} catch (InterruptedException e) {
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// Ignore.
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return;
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}
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}
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/**
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* sleep等待,忽略InterruptedException.
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*/
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public static void sleep(long duration, TimeUnit unit) {
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try {
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Thread.sleep(unit.toMillis(duration));
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} catch (InterruptedException e) {
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// Ignore.
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return;
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}
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}
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/**
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* 按照ExecutorService JavaDoc示例代码编写的Graceful Shutdown方法.
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* 先使用shutdown, 停止接收新任务并尝试完成所有已存在任务.
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* 如果超时, 则调用shutdownNow, 取消在workQueue中Pending的任务,并中断所有阻塞函数.
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* 如果仍人超時，則強制退出.
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* 另对在shutdown时线程本身被调用中断做了处理.
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*/
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public static void gracefulShutdown(ExecutorService pool, int shutdownTimeout, int shutdownNowTimeout,
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TimeUnit timeUnit) {
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pool.shutdown(); // Disable new tasks from being submitted
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try {
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// Wait a while for existing tasks to terminate
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if (!pool.awaitTermination(shutdownTimeout, timeUnit)) {
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pool.shutdownNow(); // Cancel currently executing tasks
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// Wait a while for tasks to respond to being cancelled
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if (!pool.awaitTermination(shutdownNowTimeout, timeUnit)) {
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System.err.println("Pool did not terminated");
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}
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}
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} catch (InterruptedException ie) {
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// (Re-)Cancel if current thread also interrupted
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pool.shutdownNow();
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// Preserve interrupt status
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Thread.currentThread().interrupt();
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}
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}
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/**
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* 直接调用shutdownNow的方法, 有timeout控制.取消在workQueue中Pending的任务,并中断所有阻塞函数.
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*/
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public static void normalShutdown(ExecutorService pool, int timeout, TimeUnit timeUnit) {
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try {
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pool.shutdownNow();
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if (!pool.awaitTermination(timeout, timeUnit)) {
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System.err.println("Pool did not terminated");
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}
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} catch (InterruptedException ie) {
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Thread.currentThread().interrupt();
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}
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}
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}
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