线程池异常捕获

男娘i 2021-11-04 13:50 439阅读 0赞

本文只做笔记

线程池的创建[线程池][Link 1]

## 项目结构 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3h1eGllMTM_size_16_color_FFFFFF_t_70]

## maven依赖 ##

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.8.RELEASE</version>
            <relativePath />
        </parent>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>3.8.1</version>
            </dependency>
    
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
                <scope>test</scope>
            </dependency>
        </dependencies>

## ThreadUtils ##

package com.cn.util;
    
    import org.apache.commons.lang3.concurrent.BasicThreadFactory;
    import org.apache.commons.lang3.exception.ExceptionUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.context.annotation.Bean;
    import org.springframework.core.task.AsyncTaskExecutor;
    import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
    import org.springframework.stereotype.Component;
    
    import java.util.concurrent.ThreadFactory;
    import java.util.concurrent.ThreadPoolExecutor;
    
    @Component
    public class ThreadUtils {
    
        static Logger logger = LoggerFactory.getLogger(ThreadUtils.class);
        /**
         * 线程池维护线程的最少数量
         */
        private int corePoolSize = 10;
        /**
         * 线程池维护线程的最大数量
         */
        private int maxPoolSize = 50;
        /**
         * 缓存队列
         */
        private int queueCapacity = 100;
        /**
         * 允许的空闲时间
         */
        private int keepAlive = 60;
    
        //异步线程池
        @Bean(name = "asyncExceutor")
        public AsyncTaskExecutor asyncExceutor() {
            ThreadFactory threadFactory =  new BasicThreadFactory.Builder().uncaughtExceptionHandler(new MyThreadException()).build();
            ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
            executor.setThreadFactory(threadFactory);
            executor.setCorePoolSize(corePoolSize);
            executor.setMaxPoolSize(maxPoolSize);
            executor.setKeepAliveSeconds(keepAlive);
            executor.setQueueCapacity(queueCapacity);
            executor.setThreadNamePrefix("mqExecutor-");
            // rejection-policy：当pool已经达到max size的时候，如何处理新任务
            // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
            //对拒绝task的处理策略
            executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
            executor.initialize();
            return executor;
        }
        class MyThreadException implements Thread.UncaughtExceptionHandler{
            @Override
            public void uncaughtException(Thread t, Throwable e) {
                logger.error("myException"+ExceptionUtils.getStackTrace(e));
            }
        }
    }

## ThreaController ##

package com.cn.controller;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.core.task.AsyncTaskExecutor;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    @RequestMapping("thread")
    public class ThreaController {
        static Logger logger = LoggerFactory.getLogger(ThreaController.class);
        @Autowired
        private AsyncTaskExecutor asyncExceutor;
        @RequestMapping("/test")
        public void test(){
            asyncExceutor.execute(new Runnable() {
                @Override
                public void run() {
                    System.out.println("2222222222222222");
                    int s = 1/0;
                }
            });
            System.out.println("111111111111111111");
        }
    }

## 异常效果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3h1eGllMTM_size_16_color_FFFFFF_t_70 1]

[Link 1]: https://blog.csdn.net/xuxie13/article/details/89682315
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3h1eGllMTM_size_16_color_FFFFFF_t_70 1]: /images/20211104/dfc99a48c9664addb786ff6fecdf4330.png