ThreadPoolTaskExecutor线程池创建

package com.xx.xx.config;

import java.util.concurrent.ThreadPoolExecutor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

/**
 * 线程池配置
 *
 * @author jiangkd
 * @date 2022/7/14 14:30
 */
@Configuration
public class ThreadPoolTaskExecutorConfig {

    final private Logger log = LoggerFactory.getLogger(this.getClass());

    /**
     * 线程池, ThreadPoolTaskExecutor
     * <p>
     * ThreadPoolTaskExecutor实质是对ThreadPoolExecutor的封装
     * 线程池说明以及参数参考: https://www.cnblogs.com/no-celery/p/16355344.html
     *
     * @return ThreadPoolTaskExecutor
     */
    @Bean
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        //
        final ThreadPoolTaskExecutor threadPoolTaskExecutor = new ThreadPoolTaskExecutor();
        // 最佳线程数目 =((线程等待时间+线程CPU时间)/线程CPU时间 )*CPU数目
        // 核心线程池大小
        threadPoolTaskExecutor.setCorePoolSize(8);
        // 最大线程数
        threadPoolTaskExecutor.setMaxPoolSize(16);
        // 线程池维护线程(不包括核心线程)所允许的空闲时间, 秒
        threadPoolTaskExecutor.setKeepAliveSeconds(100);
        // 队列最大长度
        threadPoolTaskExecutor.setQueueCapacity(30);
        // 线程池关闭的时候等待所有任务都完成后, 再继续销毁其他的Bean
        threadPoolTaskExecutor.setWaitForTasksToCompleteOnShutdown(true);
        // 线程池中任务销毁的等待时间, 如果超过这个时间还没有销毁就强制销毁, 以确保应用最后能够被关闭, 而不是阻塞住
        threadPoolTaskExecutor.setAwaitTerminationSeconds(60);
        // 如果为true, 核心线程空闲时间到达setKeepAliveSeconds秒后会被销毁
        threadPoolTaskExecutor.setAllowCoreThreadTimeOut(false);
        // 线程前缀名称, 方便定位处理任务所在的线程池
        threadPoolTaskExecutor.setThreadNamePrefix("ct-logic-task-");
        /*
         拒绝策略
         采用默认策略, 线程池和队列都满了的时候, 丢弃任务 && 直接抛出java.util.concurrent.RejectedExecutionException异常
         */
        threadPoolTaskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());

        // 初始化线程池
        threadPoolTaskExecutor.initialize();
        log.info("自定义线程池, ThreadPoolTaskExecutor线程池初始化 ... SUCCESS");

        return threadPoolTaskExecutor;
    }
}