package com.ruoyi.framework.config;

import com.ruoyi.common.utils.Threads;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 线程池配置
 *
 * @author ruoyi
 **/
@Slf4j
@Configuration
public class ThreadPoolConfig
{
    // 核心线程池大小
    private int corePoolSize = 50;

    // 最大可创建的线程数
    private int maxPoolSize = 200;

    // 队列最大长度
    private int queueCapacity = 1000;

    // 线程池维护线程所允许的空闲时间
    private int keepAliveSeconds = 300;

    @Bean(name = "threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor()
    {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 核心线程池大小
        executor.setCorePoolSize(corePoolSize);
        // 最大可创建的线程数
        executor.setMaxPoolSize(maxPoolSize);
        // 队列最大长度
        executor.setQueueCapacity(queueCapacity);
        // 线程池维护线程所允许的空闲时间
        executor.setKeepAliveSeconds(keepAliveSeconds);
        // 线程名称前缀
        executor.setThreadNamePrefix("async-task-executor-");
        // 设置线程工厂 (用于给线程命名，便于排查问题)
        executor.setThreadFactory(new BasicThreadFactory.Builder().namingPattern("async-task-%d").daemon(true).build());
        // 线程池对拒绝任务 (无线程可用) 的处理策略 - 调用者运行策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 初始化
        executor.initialize();
        return executor;
    }

    /**
     * 执行周期性或定时任务
     */
    @Bean(name = "scheduledExecutorService")
    protected ScheduledExecutorService scheduledExecutorService()
    {
        return new ScheduledThreadPoolExecutor(corePoolSize,
                new BasicThreadFactory.Builder().namingPattern("schedule-pool-%d").daemon(true).build(),
                new ThreadPoolExecutor.CallerRunsPolicy())
        {
            @Override
            protected void afterExecute(Runnable r, Throwable t)
            {
                super.afterExecute(r, t);
                Threads.printException(r, t);
            }
        };
    }
}