JAVA多线程(四) Executor并发框架向RabbitMQ推送消息

github代码地址: https://github.com/showkawa/springBoot_2017/tree/master/spb-demo/spb-brian-query-service

假设一个需求用户点击某个页面，我们后台需要向MQ推送信信息

1，模拟的MQ服务，我这边使用RabbitMQ (关于MQ 发送和监听消息可以参考我的博客：SpringBoot消息中间件RabbitMQ)

//后台监听消息    
@RabbitListener(queues = "brian.test")
    public void receiveMessage(User user){
        logger.info("接收到MQ的消息体: " + user);
    }

2.向IOC容器中注册一个ThreadPoolTaskExecutor实例

    @Bean
    public ThreadPoolTaskExecutor  brianThreadPool(){
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //核心线程数
        executor.setCorePoolSize(8);
        //最大线程数
        executor.setMaxPoolSize(16);
        //队列中最大的数
        executor.setQueueCapacity(8);
        //县城名称前缀
        executor.setThreadNamePrefix("brianThreadPool_");
        //rejectionPolicy：当pool已经达到max的时候，如何处理新任务
        //callerRuns：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());
        //线程空闲后最大的存活时间
        executor.setKeepAliveSeconds(60);
        //初始化加载
        executor.initialize();
        return executor;
    }

3.实现线程池并发推送消息

    /**
     * 多线程推送消息到MQ服务
     */
    public void sendMessageByThredPool(User user) throws ExecutionException, InterruptedException {
            Future<String> future = executor.submit(() -> {
                sendMessageService.sendMessage("brian","mymq",user);
                logger.info("线程 [ " + Thread.currentThread().getName() + " ] 推送消息到MQ成功! " + new Date());
                return Thread.currentThread().getName();
            });
    }

4. Controller层的调用

    @PostMapping("/loop/sendMsg/userInfo")
    public ResponseEntity addUserInfo2MQ(@RequestBody User user) throws ExecutionException, InterruptedException {
        brianService.sendMessageByThredPool(user);
        return new ResponseEntity(user, HttpStatus.OK);

    }

5.利用postman 做压力测试，测试接口

5.1 postman做loop压力测试，需要单创建一个Collections来测试，并且当前Collections值允许放一个测试用例，比如我下面的loopSendUserInfo