并发模拟工具

￡神魔★判官ぃ 2023-07-03 06:20 84阅读 0赞

@Controller
    public class TestController {
        @RequestMapping("/test")
        @ResponseBody
        public String test() {
            return "test";
        }
    
        @RequestMapping("/isLive")
        @ResponseBody
        public String test2() {
            return "live";
        }
    }

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# 1 Postman #

> Http请求模拟工具

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2][]

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# 2 Apache Bench #

> Apache Bench（AB）：Apache附带的工具，测试网站性能
> 
>  *  [http://httpd.apache.org/docs/2.4/programs/ab.html][http_httpd.apache.org_docs_2.4_programs_ab.html]
>  *  [https://zhuanlan.zhihu.com/p/85280787][https_zhuanlan.zhihu.com_p_85280787]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3][]

> ab -n 1000 -c 50 http://localhost:8080/test
> 
>  *  \-n：本次测试请求的总数
>  *  \-c：并发数

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 4][]

Concurrency Level:      并发量                                                            
    Time taken for tests:   整个测试所用的时间                                                 
    Complete requests:      完成的请求数                                                          
    Failed requests:        失败的请求数                                                              
    Total transferred:      所有请求的响应数据的长度总和，包括每个http响应数据的头信息和正文数据的长度（不包括http请求数据的长度，仅仅为web服务器流向用户pc的应用层数据总长度)                                            
    HTML transferred:       所有请求的响应数据中正文数据的总和（减去了Total transferred中http响应数据中的头信息的长度）                                                
    Requests per second:    吞吐率（和并发数相关，计算：Complete requests/Time taken for tests）                                         
    Time per request:       用户平均请求等待时间                                           
    Time per request:       服务器平均请求等待时间            
    Transfer rate:          单位时间内从服务器获取的数据的长度（计算：Total transferred/Time taken for tests）

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# 3 JMeter #

> JMeter：Apache组织开发的压力测试工具

## 3.1 Windows 安装  ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 5][]

## 3.3 使用 ##

![20200203155631199.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 8][]

> 添加监听器

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 10][]

![20200203161615218.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 11][]

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# 4 代码：Semaphore、CountDownLatch等 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 12][]

@Slf4j
    public class ConcurrencyTest {
        // 请求总数
        public static int clientTotal = 5000;
        // 同时并发执行的线程数
        public static int threadTotal = 200;
        public static int count = 0;
    
        public static void main(String[] args) throws Exception {
            ExecutorService executorService = Executors.newCachedThreadPool();
            final Semaphore semaphore = new Semaphore(threadTotal);
            final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
            for (int i = 0; i < clientTotal ; i++) {
                executorService.execute(() -> {
                    try {
                        semaphore.acquire();
                        add();
                        semaphore.release();
                    } catch (Exception e) {
                        log.error("exception", e);
                    }
                    countDownLatch.countDown();
                });
            }
            countDownLatch.await();
            executorService.shutdown();
            log.info("count:{}", count);
        }
        private static void add() {
            count++;
        }
    }

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[http_httpd.apache.org_docs_2.4_programs_ab.html]: http://httpd.apache.org/docs/2.4/programs/ab.html
[https_zhuanlan.zhihu.com_p_85280787]: https://zhuanlan.zhihu.com/p/85280787
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200203150818677.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly95dWFueXUuYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
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[20200203155631199.png]: https://img-blog.csdnimg.cn/20200203155631199.png
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[20200203161615218.png]: https://img-blog.csdnimg.cn/20200203161615218.png
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