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/*
 *  Copyright 2019-2020 Zheng Jie
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.efeichong.threadPool;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

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

/**
 * 异步任务线程池装配类
 *
 * @author lxk
 * @date 2020/11/25
 * @description
 */
@Slf4j
@Configuration
@RequiredArgsConstructor
public class AsyncTaskExecutePool implements AsyncConfigurer {

    /**
     * 注入配置类
     */
    private final AsyncTaskProperties config;

    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //线程池维护线程的最少数量
        executor.setCorePoolSize(config.getCorePoolSize());
        //线程池维护线程的最大数量
        executor.setMaxPoolSize(config.getMaxPoolSize());
        //缓存队列
        executor.setQueueCapacity(config.getQueueCapacity());
        //允许的空闲时间
        executor.setKeepAliveSeconds(config.getKeepAliveSeconds());
        //线程名字前缀
        executor.setThreadNamePrefix("async-");
        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (throwable, method, objects) -> {
            log.error("====" + throwable.getMessage() + "====", throwable);
            log.error("exception method:" + method.getName());
        };
    }
}