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package com.xwc1125.common.util.thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @Description: 线程相关工具类
 * @Author: xwc1125
 * @Date: 2019-03-09 21:39
 * @Copyright Copyright@2019
 */
public class Threads {

    private static Logger log = LoggerFactory.getLogger(Threads.class);
    /**
     * sleep等待
     *
     * @param milliseconds 毫秒
     */
    public static void sleep(long milliseconds) {
        try {
            Thread.sleep(milliseconds);
        } catch (InterruptedException e) {
            return;
        }
    }

    /**
     * 停止线程池
     * 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 shutdownAndAwaitTermination(ExecutorService pool) {
        if (pool != null && !pool.isShutdown()) {
            pool.shutdown();
            try {
                if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
                    pool.shutdownNow();
                    if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
                        log.info("Pool did not terminate");
                    }
                }
            } catch (InterruptedException ie) {
                pool.shutdownNow();
                Thread.currentThread().interrupt();
            }
        }
    }
}