/**
* Copyright (c) 2005-2012 springside.org.cn
*
* Licensed under the Apache License, Version 2.0 (the "License");
*/
package com.sobey.framework.utils;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
/**
* 线程相关工具类.
*
* @author calvin
*/
public class Threads {
/**
* sleep等待,单位为毫秒,忽略InterruptedException.
*/
public static void sleep(long millis) {
try {
Thread.sleep(millis);
} catch (InterruptedException e) {
// Ignore.
}
}
/**
* sleep等待,忽略InterruptedException.
*/
public static void sleep(long duration, TimeUnit unit) {
try {
Thread.sleep(unit.toMillis(duration));
} catch (InterruptedException e) {
// Ignore.
}
}
/**
* 按照ExecutorService JavaDoc示例代码编写的Graceful Shutdown方法. 先使用shutdown, 停止接收新任务并尝试完成所有已存在任务. 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. 如果仍人超時,則強制退出. 另对在shutdown时线程本身被调用中断做了处理.
*/
public static void gracefulShutdown(ExecutorService pool, int shutdownTimeout, int shutdownNowTimeout,
TimeUnit timeUnit) {
pool.shutdown(); // Disable new tasks from being submitted
try {
// Wait a while for existing tasks to terminate
if (!pool.awaitTermination(shutdownTimeout, timeUnit)) {
pool.shutdownNow(); // Cancel currently executing tasks
// Wait a while for tasks to respond to being cancelled
if (!pool.awaitTermination(shutdownNowTimeout, timeUnit)) {
System.err.println("Pool did not terminated");
}
}
} catch (InterruptedException ie) {
// (Re-)Cancel if current thread also interrupted
pool.shutdownNow();
// Preserve interrupt status
Thread.currentThread().interrupt();
}
}
/**
* 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.
*/
public static void normalShutdown(ExecutorService pool, int timeout, TimeUnit timeUnit) {
try {
pool.shutdownNow();
if (!pool.awaitTermination(timeout, timeUnit)) {
System.err.println("Pool did not terminated");
}
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
}
}
}