架构师训练营第 7 周作业

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发布于: 2020 年 07 月 22 日
架构师训练营第7周作业

用你熟悉的编程语言写一个 web 性能压测工具,输入参数:URL,请求总次数,并发数。输出参数:平均响应时间,95% 响应时间。用这个测试工具以 10 并发、100 次请求压测 www.baidu.com

一、代码

package com.study.architect.homework.week07;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
/**
* @ClassName PerformanceTestUtil
* @Description 性能测试工具
* @Date 2020/7/20 11:26
* @Version 1.0
**/
public class PerformanceTestUtil {
private static final String URL = "http://www.baidu.com";
public static void main(String[] args) {
// 并发10
performanceTest(100, 10);
// 并发100
performanceTest(100, 100);
}
private static void performanceTest(int totalRequest, int threads) {
long[] responseTimeArr = new long[totalRequest];
ExecutorService executorService = Executors.newFixedThreadPool(threads);
AtomicInteger atomicInteger = new AtomicInteger(0);
for (int i = 0; i < threads; i++) {
executorService.submit(new Runnable() {
@Override
public void run() {
for (int i = 0; i < totalRequest/threads; i++) {
long responseTime = requestUrl();
responseTimeArr[atomicInteger.getAndIncrement()] = responseTime;
}
}
});
}
while (atomicInteger.get() != totalRequest);
executorService.shutdownNow();
int totalTime = 0;
for (long responseTime : responseTimeArr) {
totalTime += responseTime;
}
System.out.println("================并发数(" + threads + ")==================");
System.out.println("平均响应时间(毫秒):" + totalTime/totalRequest);
Arrays.sort(responseTimeArr);
System.out.println("95%响应时间(毫秒):" + responseTimeArr[(int)(totalRequest * 0.95)]);
}
private static void connectUrl(String url) {
HttpClient client = new HttpClient();
GetMethod getMethod = new GetMethod(url);
getMethod.setRequestHeader("User_Agent", "Mozilla/5.0(Windows NT 6.1;Win64;x64;rv:39.0) Gecko/20100101 Firefox/39.0");
try {
int statusCode = client.executeMethod(getMethod);
if (statusCode != HttpStatus.SC_OK) {
System.out.println("Wrong");
}
} catch (HttpException e) {
System.out.println("Please check your provided http address!");
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
getMethod.releaseConnection();
}
}
private static long requestUrl() {
long startTime = System.currentTimeMillis();
connectUrl(URL);
long endTime = System.currentTimeMillis();
return endTime - startTime;
}
}

二、输出结果



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架构师训练营第7周作业