springboot 多线程 @Async


springboot 多线程 @Async

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

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

/**
 * @author Administrator
 */
@Configuration
@EnableAsync
public class AsyncConfiguration {

    @Bean("doSomethingExecutor")
    public Executor doSomethingExecutor() {
        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(10);
        // 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(20);
        // 缓冲队列:用来缓冲执行任务的队列
        executor.setQueueCapacity(500);
        // 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(60);
        // 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("do-something-");
        // 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.DiscardPolicy());
        executor.initialize();
        return executor;
    }
}

测试一下

    @Async("doSomethingExecutor")
    public CompletableFuture<String> doSomething(String message) {
       CxModUser  cxModUser=cxModUserService.getById("1504300637811126273");
        System.out.println("查询的用户"+cxModUser.getNickname()+"==========版本号======="+cxModUser.getVersion());
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
        }
        cxModUser.setNickname(message);
        boolean aa=cxModUserService.updateById(cxModUser);
        if (aa){
            System.out.println("成功"+message);
        }else {
            System.out.println("失败"+message);
        }
        return CompletableFuture.completedFuture(message);
    }
}

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