package com.jilongda.optometrist.config;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.scheduling.annotation.EnableAsync;
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import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
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import java.util.concurrent.Executor;
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import java.util.concurrent.ThreadPoolExecutor;
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@Configuration
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@EnableAsync
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public class AsyncConfiguration {
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@Bean("fileDownloadExecutor")
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public Executor fileDownloadExecutor() {
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ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
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// 核心线程数：线程池创建时候初始化的线程数
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executor.setCorePoolSize(10);
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// 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
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executor.setMaxPoolSize(20);
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// 缓冲队列：用来缓冲执行任务的队列
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executor.setQueueCapacity(500);
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// 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
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executor.setKeepAliveSeconds(60);
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// 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
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executor.setThreadNamePrefix("fileDownload-");
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// 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）
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executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
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executor.initialize();
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return executor;
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}
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}
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