🎀Java线程池创建

简介

Java 手动创建线程池

代码

package com.zk.app.utils;

import com.google.common.util.concurrent.ThreadFactoryBuilder;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @program: ZK
 * @description:
 * @author: zuokun
 * @create: 2024-11-20 15:44
 **/
public class ThreadPoolUtils {

    private static volatile ExecutorService testExecutor;

    public static ExecutorService getTestExecutor() {
        if(testExecutor == null){
            synchronized (ThreadPoolUtils.class){
                if(testExecutor == null){
                    testExecutor = new ThreadPoolExecutor(10, 20, 10,
                            java.util.concurrent.TimeUnit.SECONDS,
                            new ArrayBlockingQueue<>(100),
                            new ThreadFactoryBuilder().setNameFormat("test-pool-%d").build(),
                            new ThreadPoolExecutor.CallerRunsPolicy());
                }
            }
        }
        return testExecutor;
    }

}

ThreadFactoryBuilder().setNameFormat 是 Guava 库中的一个方法，用于构建 ThreadFactory 实例。这个 ThreadFactory 可以用来创建新的线程，并且可以设置线程的名称格式。

使用

    @Test
    public void poolTest() {
        for (int i = 0; i < 10; i++) {
            ThreadPoolUtils.getTestExecutor().submit(() -> {
                System.out.println(Thread.currentThread().getName());
            });
        }
    }

结果

test-pool-0
test-pool-3
test-pool-2
test-pool-1
test-pool-4
test-pool-5
test-pool-6
test-pool-7
test-pool-8
test-pool-9

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结束