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com.xiaoleilu.hutool.util.ThreadUtil Maven / Gradle / Ivy
package com.xiaoleilu.hutool.util;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import com.xiaoleilu.hutool.thread.GlobalThreadPool;
/**
* 线程池工具
*
* @author luxiaolei
*/
public class ThreadUtil {
/**
* 新建一个线程池
*
* @param threadSize 同时执行的线程数大小
* @return ExecutorService
*/
public static ExecutorService newExecutor(int threadSize) {
return new ThreadPoolExecutor(threadSize, threadSize, 0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue());
}
/**
* 获得一个新的线程池
*
* @return ExecutorService
*/
public static ExecutorService newExecutor() {
return new ThreadPoolExecutor(0, Integer.MAX_VALUE, 60L, TimeUnit.SECONDS, new SynchronousQueue());
}
/**
* 获得一个新的线程池，只有单个线程
*
* @return ExecutorService
*/
public static ExecutorService newSingleExecutor() {
return Executors.newSingleThreadExecutor();
}
/**
* 获得一个新的线程池());
}
/**
* 获得一个新的线程池());
}
/**
* 直接在公共线程池中执行线程
*
* @param runnable 可运行对象
*/
public static void execute(Runnable runnable) {
GlobalThreadPool.execute(runnable);
}
/**
* 执行异步方法
*
* @param runnable 需要执行的方法体
* @param isDeamon 是否守护线程。守护线程会在主线程结束后自动结束
* @return 执行的方法体
*/
public static Runnable excAsync(final Runnable runnable, boolean isDeamon) {
Thread thread = new Thread() {
@Override
public void run() {
runnable.run();
}
};
thread.setDaemon(isDeamon);
thread.start();
return runnable;
}
/**
* 执行有返回值的异步方法 回调对象类型
* @param task {@link Callable}
* @return Future
*/
public static Future execAsync(Callable task) {
return GlobalThreadPool.submit(task);
}
/**
* 执行有返回值的异步方法 回调对象类型
* @return CompletionService
*/
public static CompletionService newCompletionService() {
return new ExecutorCompletionService(GlobalThreadPool.getExecutor());
}
/**
* 新建一个CompletionService，调用其submit方法可以异步执行多个任务，最后调用take方法按照完成的顺序获得其结果。 回调对象类型
* @param executor 执行器 {@link ExecutorService}
* @return CompletionService
*/
public static CompletionService newCompletionService(ExecutorService executor) {
return new ExecutorCompletionService(executor);
}
/**
* 新建一个CountDownLatch，一个同步辅助类，在完成一组正在其他线程中执行的操作之前，它允许一个或多个线程一直等待。
*
* @param threadCount 线程数量
* @return CountDownLatch
*/
public static CountDownLatch newCountDownLatch(int threadCount) {
return new CountDownLatch(threadCount);
}
/**
* 创建新线程，非守护线程，正常优先级，线程组与当前线程的线程组一致
*
* @param runnable {@link Runnable}
* @param name 线程名
* @return {@link Thread}
* @since 3.1.2
*/
public static Thread newThread(Runnable runnable, String name) {
final Thread t = new Thread(currentThreadGroup(), runnable, name);
if (t.isDaemon()) {
t.setDaemon(false);
}
if (t.getPriority() != Thread.NORM_PRIORITY) {
t.setPriority(Thread.NORM_PRIORITY);
}
return t;
}
/**
* 挂起当前线程
*
* @param timeout 挂起的时长
* @param timeUnit 时长单位
* @return 被中断返回false，否则true
*/
public static boolean sleep(Number timeout, TimeUnit timeUnit) {
try {
timeUnit.sleep(timeout.longValue());
} catch (InterruptedException e) {
return false;
}
return true;
}
/**
* 挂起当前线程
*
* @param millis 挂起的毫秒数
* @return 被中断返回false，否则true
*/
public static boolean sleep(Number millis) {
if (millis == null) {
return true;
}
try {
Thread.sleep(millis.longValue());
} catch (InterruptedException e) {
return false;
}
return true;
}
/**
* 考虑{@link Thread#sleep(long)}方法有可能时间不足给定毫秒数，此方法保证sleep时间不小于给定的毫秒数
*
* @see ThreadUtil#sleep(Number)
* @param millis 给定的sleep时间
* @return 被中断返回false，否则true
*/
public static boolean safeSleep(Number millis) {
long millisLong = millis.longValue();
long done = 0;
while (done < millisLong) {
long before = System.currentTimeMillis();
if (false == sleep(millisLong - done)) {
return false;
}
long after = System.currentTimeMillis();
done += (after - before);
}
return true;
}
/**
* @return 获得堆栈列表
*/
public static StackTraceElement[] getStackTrace() {
return Thread.currentThread().getStackTrace();
}
/**
* 获得堆栈项
*
* @param i 第几个堆栈项
* @return 堆栈项
*/
public static StackTraceElement getStackTraceElement(int i) {
StackTraceElement[] stackTrace = getStackTrace();
if (i < 0) {
i += stackTrace.length;
}
return stackTrace[i];
}
/**
* 创建本地线程对象
*
* @param 持有对象类型
* @param isInheritable 是否为子线程提供从父线程那里继承的值
* @return 本地线程
*/
public static ThreadLocal createThreadLocal(boolean isInheritable) {
if (isInheritable) {
return new InheritableThreadLocal<>();
} else {
return new ThreadLocal<>();
}
}
/**
* 结束线程，调用此方法后，线程将抛出 {@link InterruptedException}异常
*
* @param thread 线程
* @param isJoin 是否等待结束
*/
public static void interupt(Thread thread, boolean isJoin) {
if (null != thread && false == thread.isInterrupted()) {
thread.interrupt();
if (isJoin) {
waitForDie(thread);
}
}
}
/**
* 等待线程结束. 调用 {@link Thread#join()} 并忽略 {@link InterruptedException}
*
* @param thread 线程
*/
public static void waitForDie(Thread thread) {
boolean dead = false;
do {
try {
thread.join();
dead = true;
} catch (InterruptedException e) {
// ignore
}
} while (!dead);
}
/**
* 获取JVM中与当前线程同组的所有线程
