package com.njcn.jbsyncdata.config;

import lombok.AllArgsConstructor;
import lombok.Data;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author hongawen
 * @version 1.0.0
 * @date 2022年03月11日 09:32
 */
@Data
@Order(100)
@Configuration
@EnableAsync
@AllArgsConstructor
public class AsyncConfiguration {

    private final GeneralInfo generalInfo;

    @Bean("asyncExecutor")
    public Executor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 核心线程数：线程池创建时候初始化的线程数
        executor.setCorePoolSize(generalInfo.getCorePoolSize());
        // 最大线程数：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(generalInfo.getMaxPoolSize());
        // 缓冲队列：用来缓冲执行任务的队列
        executor.setQueueCapacity(generalInfo.getQueueCapacity());
        // 允许线程的空闲时间60秒：当超过了核心线程之外的线程在空闲时间到达之后会被销毁
        executor.setKeepAliveSeconds(generalInfo.getKeepAliveSeconds());
        // 线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix(generalInfo.getMicroServiceName());
        // 缓冲队列满了之后的拒绝策略：由调用线程处理（一般是主线程）
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

}