package com.dl.common.utils;
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import lombok.AccessLevel;
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import lombok.NoArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import java.util.concurrent.*;
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/**
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* 线程相关工具类.
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*
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* @author dl
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*/
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@Slf4j
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@NoArgsConstructor(access = AccessLevel.PRIVATE)
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public class Threads {
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/**
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* sleep等待,单位为毫秒
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*/
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public static void sleep(long milliseconds) {
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try {
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Thread.sleep(milliseconds);
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} catch (InterruptedException e) {
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return;
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}
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}
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/**
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* 停止线程池
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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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* 如果仍然超時，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 shutdownAndAwaitTermination(ExecutorService pool) {
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if (pool != null && !pool.isShutdown()) {
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pool.shutdown();
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try {
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if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
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pool.shutdownNow();
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if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
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log.info("Pool did not terminate");
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}
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}
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} catch (InterruptedException ie) {
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pool.shutdownNow();
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Thread.currentThread().interrupt();
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}
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}
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}
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/**
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* 打印线程异常信息
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*/
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public static void printException(Runnable r, Throwable t) {
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if (t == null && r instanceof Future<?>) {
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try {
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Future<?> future = (Future<?>) r;
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if (future.isDone()) {
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future.get();
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}
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} catch (CancellationException ce) {
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t = ce;
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} catch (ExecutionException ee) {
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t = ee.getCause();
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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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if (t != null) {
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log.error(t.getMessage(), t);
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}
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}
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}
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