本文将介绍使用注解+AOP(面向切面编程)的方式实现其功能，一来可以快速使用StopWatch功能，二来让大家熟悉一下如何使用注解进行切面编程_
1. 自定义一个注解 StopWatchTime
@Retention(RetentionPolicy.RUNTIME)
@Target({METHOD})
public @interface StopWatchTime {
String value() default "";
}
本注解主要用在方法上，故target为METHOD，并设定一个value，可用于定义此次观察的名称。
2. 创建切面类
- 引用AOP支持包
org.springframework.boot
spring-boot-starter-aop
- 创建切面类
@Aspect // 1
@Component // 2
public class StopWatchTimeAdvice {
@Around("@annotation(stopWatchTime)") // 3
public Object invoke(ProceedingJoinPoint thisJoinPoint, StopWatchTime stopWatchTime) throws Throwable {
MethodSignature methodSignature = (MethodSignature) thisJoinPoint.getSignature();
String name = StringUtils.isEmpty(stopWatchTime.value()) ? methodSignature.getName() : stopWatchTime.value(); // 4
StopWatch stopWatch = new StopWatch(name);
stopWatch.start("00");
Object object = thisJoinPoint.proceed(); // 5
stopWatch.stop();
System.err.println(stopWatch.prettyPrint()); // 6
return object;
}
}
代码解释
- 通过@Aspect 注解声明一个切面
- 通过@Component 让此切面成为Spring容器管理的Bean
- 通过@Around注解声明一个建言，并使用定义了自定义注解@StopWatchTime的方法作为切入点
- 获取注解上的属性，如果无就默认当前的方法名“ methodSignature.getName() ”
- 作好StopWatch的前期准备后，执行切入点的方法体
- 执行完成后打印执行结果
3. 注解被观察方法
@StopWatchTime
public void run(String... strings) throws Exception {
step1();
step2();
step3();
}
private void step1() throws InterruptedException {
Thread.sleep(100L);
}
private void step2() throws InterruptedException {
Thread.sleep(850L);
}
private void step3() throws InterruptedException {
Thread.sleep(2000L);
}
只要@StopWatchTime写在哪个方法上就能监控得出哪个方法的执行时间，但且限于public非静态方法
输出结果
StopWatch 'run': running time (millis) = 2985
-----------------------------------------
ms % Task name
-----------------------------------------
02985 100% 00
大家可能会看出来，此方法虽然使用起来方便，但只能显示单个方法的执行时间，下一篇将告诉大家如何使用AOP的方法扩展出可同时观察一个代码段里多个方法的执行情况，敬请期待。
http://www.spring4all.com/article/176
公司的项目有的页面超级慢，20s以上，不知道用户会不会疯掉，于是老大说这个页面要性能优化。于是，首先就要搞清楚究竟是哪一步耗时太多。
我采用spring aop来统计各个阶段的用时，其中计时器工具为StopWatch。
文章结构：
- 遇到的问题
- 创建项目
- AOP-HelloWorld
- 时间统计
- bug
- final
- 压力测试
- 源码
其中，遇到的问题:
1.少包aspectjweaver
添加依赖后才可以使用@Aspect
2.环绕通知加入多个point
刚开使用&&连接多个point，傻傻的看不到调用，忽然看到要用||才对
3.监听时间工具StopWatch每次只能启动一个，一定要关闭后才能启动下一个。
而我想要测试controller->service->repository各个阶段用时显然很不适应。因为使用同一个stopwatch对象来保存时间，而stopwatch每次只能记录一个时间段作为总时间的一部分，不存在时间嵌套关系（这个以后可以考虑想想别的方案）。controller开始后执行部分验证逻辑或是其他，然后调用service，这时候service启动定时会失败，因为controller的计时器还没关，因此需要先关掉controller的计时器。这样会导致controller的计时部分仅仅是调用service之前的时间，service返回值之后，controller再进行某些处理的时间并没有统计。显然，我需要一个卡表的时间统计设计，即进入controller开始计时，调用service后开始service计时，以此类推，最后获得controller总时间Tc，service总时间Ts，repository总时间Tr.所以时间统计应该如图1：
图一 图二
这样的话，我应该分别获得Tc,Ts,Tr的时间，然后计算百分比或者别的统计工作。也就是说，log仅仅是log，记录而已，想要得到一个统计结果还需要针对数据二次开发，这就需要将时间存储起来或者进行日志挖掘，然而这统计的工作会越来越复杂，最终我都不知会加多少任务进去。
事实上，我们这个页面耗费时间主要是多个webservice调用产生的io耗时，也就是说其实统计一个层面的时间就差不多了。那么，忽略service返回后controller的其他时间，仅仅计算controller开始到调用service的时间为Tc,service开始到调用repository的时间为Ts，如图2，这样利用StopWatch就很容获取时间统计结果。
4.线程不安全
我居然使用单例的一个成员变量做状态存储，真是。待改进
1.搭建项目
采用spring-boot-aop的框架来搭建。最终结构图如下：
1.1在idea中，new project-》maven
1.2初始化pom，添加aop，web，test依赖：
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< project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
< modelVersion >4.0.0 < groupId >com.test < artifactId >spring-aop < version >1.0-SNAPSHOT < dependencyManagement >
< dependencies >
< dependency >
< groupId >org.springframework.boot < artifactId >spring-boot-dependencies < version >1.3.5.RELEASE < type >pom < scope >import < dependencies >
< dependency >
< groupId >org.springframework.boot < artifactId >spring-boot-starter-aop < dependency >
< groupId >org.springframework.boot < artifactId >spring-boot-starter-web < dependency >
< groupId >org.springframework.boot < artifactId >spring-boot-starter-test < scope >test < dependency >
< groupId >org.assertj < artifactId >assertj-core-java8 < version >1.0.0m1 < build >
< plugins >
< plugin >
< groupId >org.springframework.boot < artifactId >spring-boot-maven-plugin |
1.3创建启动入口：com.test.spring.aop.Application.java
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package com.test.spring.aop;
import com.test.spring.aop.domain.service.IHelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* Created by miaorf on 2016/7/16.
*/
@SpringBootApplication
public class Application implements CommandLineRunner{
@Autowired
IHelloService helloService;
public void run(String... strings) throws Exception {
System.out.println( "start application by CommandLineRunner, the args:" +strings.length);
helloService.sayHi();
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Application. class , args);
}
}
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1.4发现我们需要一个service:
创建com.test.spring.aop.domain.service.IHelloService
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package com.test.spring.aop.domain.service;
/**
* Created by miaorf on 2016/7/16.
*/
public interface IHelloService {
void sayHi();
}
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创建com.test.spring.aop.domain.service.impl.HelloService
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package com.test.spring.aop.domain.service.impl;
import com.test.spring.aop.domain.service.IHelloService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
/**
* Created by miaorf on 2016/7/16.
*/
@Service
public class HelloService implements IHelloService {
@Value ( "${name}" )
private String name;
public void sayHi() {
for ( int i = 0 ; i < 100000 ; i++) {
}
System.out.println( "Hi " +name);
System.out.println( "I'm running." );
}
}
|
1.5发现我们需要一个属性配置文件：
创建application.yml
1 name: Ryan
1.6这时候可以测试一下启动看看了
直接启动：运行com.test.spring.aop.Application#main()即可。
命令行启动：mvn spring-boot:run，
命令行bug启动：mvn spring-boot:run -Drun.jvmArguments="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005"
1.7创建测试com.test.spring.aop.ApplicationTest
package com.test.spring.aop;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.springframework.boot.test.OutputCapture;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Created by miaorf on 2016/7/16.
*/
public class ApplicationTest {
@Rule
public OutputCapture outputCapture = new OutputCapture();
private String profiles;
@Before
public void init() throws Exception {
this.profiles = System.getProperty("spring.profiles.active");
}
@After
public void tearDown() throws Exception {
if (this.profiles != null){
System.setProperty("spring.profiles.active",this.profiles);
}else{
System.out.println("spring.profiles.active");
}
}
@Test
public void testDefaultSettings() throws Exception{
Application.main(new String[0]);
String s = this.outputCapture.toString();
assertThat(s).contains("Hi Ryan");
}
@Test
public void testCommandLineOverrides() throws Exception {
Application.main(new String[] {"--name=Leslie"});
String s = this.outputCapture.toString();
assertThat(s).contains("Hi Leslie");
}
}
2.AOP - HelloWorld
2.1创建com.test.spring.aop.monitor.ServiceMonitor
package com.test.spring.aop.monitor;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch;
/**
* Created by miaorf on 2016/7/16.
*/
@Aspect
@Component
public class ServiceMonitor {
private static Logger logger = LoggerFactory.getLogger(ServiceMonitor.class);
StopWatch stopWatch = new StopWatch("performance");
/**
* define point
*/
@Pointcut("execution(* com.test.spring.aop..*Service.*(..))")
public void performance(){}
// @Before("performance()")
// public void startService(){
// System.out.println("-----------service start-------");
// }
// @After("performance()")
// public void endService(){
// System.out.println("-----------service end neither success or failed -------");
// }
//
// @AfterReturning("performance()")
// public void logServiceAccess(JoinPoint joinPoint) {
// System.out.println("service completed:"+joinPoint);
// }
/**
* 必须要返回，不然后面收不到
* @param point
* @return
*/
@Around("performance()")
public Object watchPerformance(ProceedingJoinPoint point){
System.out.println("The service start:");
stopWatch.start(point.getSignature().toString());
try {
return point.proceed();
} catch (Throwable throwable) {
logger.error("The service not work!",throwable);
throwable.printStackTrace();
}finally {
stopWatch.stop();
stopWatch.start("b");
for (int i = 0; i < 12345; i++) {
}
stopWatch.stop();
StopWatch.TaskInfo[] taskInfo = stopWatch.getTaskInfo();
for (StopWatch.TaskInfo info : taskInfo) {
System.out.println(info.getTaskName());
System.out.println(info.getTimeMillis());
}
logger.info("The {} run time:{}",point.getSignature().toString(),stopWatch.prettyPrint());
}
return null;
}
}
2.2测试
测试水平还没开始，所以只能手动测试了，运行com.test.spring.aop.ApplicationTest可以看到在HelloService调用前后插入了日志。
3.时间统计
最终，生成类图如下：
最终获得的时间统计如下：
2016-07-16 21:25:09.361 INFO 16824 --- [nio-8080-exec-4] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 3218 ----------------------------------------- ms % Task name ----------------------------------------- 01001 031% List com.test.spring.aop.domain.service.IUserService.getAll() 02000 062% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() 00217 007% List com.test.spring.aop.domain.repository.IUserDao.getAll()
3.1需要设计一个controller
创建com.test.spring.aop.web.UserController：
package com.test.spring.aop.web;
import com.test.spring.aop.domain.entiry.User;
import com.test.spring.aop.domain.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
/**
* Created by miaorf on 2016/7/16.
*/
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private IUserService userService;
@ResponseBody
@RequestMapping("/all")
public List users(){
try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
List all = userService.getAll();
return all;
}
}
3.2发现需要一个service
创建com.test.spring.aop.domain.service.IUserService
package com.test.spring.aop.domain.service;
import com.test.spring.aop.domain.entiry.User;
import java.util.List;
/**
* Created by miaorf on 2016/7/16.
*/
public interface IUserService {
List getAll();
}
创建com.test.spring.aop.domain.service.impl.UserService
package com.test.spring.aop.domain.service.impl;
import com.test.spring.aop.domain.entiry.User;
import com.test.spring.aop.domain.repository.IConnector;
import com.test.spring.aop.domain.repository.IUserDao;
import com.test.spring.aop.domain.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* Created by miaorf on 2016/7/16.
*/
@Service
public class UserService implements IUserService {
@Autowired
private IUserDao userDao;
@Autowired
private IConnector connector;
public List getAll() {
try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
connector.getSthFromRemote();
return userDao.getAll();
}
}
3.3发现需要一个repository
创建com.test.spring.aop.domain.repository.IUserDao
package com.test.spring.aop.domain.repository;
import com.test.spring.aop.domain.entiry.User;
import java.util.List;
/**
* Created by miaorf on 2016/7/16.
*/
public interface IUserDao {
List getAll();
}
创建com.test.spring.aop.domain.repository.impl.UserDao
package com.test.spring.aop.domain.repository.impl;
import com.test.spring.aop.domain.entiry.User;
import com.test.spring.aop.domain.repository.IUserDao;
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
/**
* Created by miaorf on 2016/7/16.
*/
@Repository
public class UserDao implements IUserDao {
public List getAll() {
//mock data
List list = new ArrayList(10000);
for (int i = 0; i < 10000; i++) {
list.add(new User(i,"name_"+i,getRondomString(6),i,i%2,getRondomString(100)));
}
return list;
}
private String getRondomString(int length){
StringBuffer buf = new StringBuffer("a,b,c,d,e,f,g,h,i,g,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z");
buf.append(",A,B,C,D,E,F,G,H,I,G,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z");
buf.append(",~,@,#,$,%,^,&,*,(,),_,+,|,`,.");
buf.append(",1,2,3,4,5,6,7,8,9,0");
String[] arr = buf.toString().split(",");
StringBuffer result = new StringBuffer();
for (int i = 0; i < length; i++) {
int random = (int) (Math.random() * 10000 + 1);
result.append(arr[random % arr.length]);
}
return result.toString();
}
}
3.3.1临时添加一个远程调用
创建com.test.spring.aop.domain.repository.IConnector
package com.test.spring.aop.domain.repository;
/**
* Created by miaorf on 2016/7/16.
*/
public interface IConnector {
Object getSthFromRemote();
}
创建com.test.spring.aop.domain.repository.impl.Connector
package com.test.spring.aop.domain.repository.impl;
import com.test.spring.aop.domain.repository.IConnector;
import org.springframework.stereotype.Component;
/**
* Created by miaorf on 2016/7/16.
*/
@Component
public class Connector implements IConnector {
public Object getSthFromRemote() {
//mock time
try {Thread.sleep(2000);} catch (InterruptedException e) {e.printStackTrace();}
return null;
}
}
3.4发现需要一个实体类
创建com.test.spring.aop.domain.entiry.User
package com.test.spring.aop.domain.entiry;
/**
* Created by miaorf on 2016/7/16.
*/
public class User {
Integer id;
String username;
String password;
Integer age;
Integer sex;
String info;
public User() {
}
public User(Integer id, String username, String password, Integer age, Integer sex, String info) {
this.id = id;
this.username = username;
this.password = password;
this.age = age;
this.sex = sex;
this.info = info;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Integer getSex() {
return sex;
}
public void setSex(Integer sex) {
this.sex = sex;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
", age=" + age +
", sex=" + sex +
", info='" + info + '\'' +
'}';
}
}
3.5完成
以上就基本把一个web接口搞定了，可以运行测试一下，使用浏览器或者postman访问localhost:8080/user/all就可以获得user列表了。
3.6加入user时间统计
创建com.test.spring.aop.monitor.UserMonitor
package com.test.spring.aop.monitor;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch;
/**
* Created by miaorf on 2016/7/16.
*/
@Aspect
@Component
public class UserMonitor {
private static Logger logger = LoggerFactory.getLogger(UserMonitor.class);
StopWatch stopWatch;
@Pointcut("execution(* com.test.spring.aop.web.UserController.users())")
public void controllerPerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.service.impl.UserService.getAll())")
public void servicePerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.repository.impl.UserDao.getAll())")
public void repositoryPerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.repository.impl.Connector.getSthFromRemote())")
public void connectorPerformance() {
}
@Before("controllerPerformance()")
public void startWatch() {
stopWatch = new StopWatch("controller");
}
@After("controllerPerformance()")
public void endWatch() {
logger.info(stopWatch.prettyPrint());
stopWatch = null;
}
@Around("servicePerformance() || repositoryPerformance() || connectorPerformance()")
public Object watchPerformance(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("---------------------------");
try {
//如果是一层一层的，这里只能统计到到下一层需要的时间，因为返回值后没有统计，也就是说只能统计平行的调用
if (stopWatch.isRunning()){
stopWatch.stop();
}
stopWatch.start(joinPoint.getSignature().toString());
} catch (IllegalStateException e) {
logger.error("watch start error:",e);
}
Object proceed = joinPoint.proceed();
try {
if (stopWatch.isRunning()){
stopWatch.stop();
}
} catch (IllegalStateException e) {
logger.error("watch end error:",e);
}
return proceed;
}
}
这里有几点问题：
1.StopWatch不能重复创建，如果想统计每次controller访问时间，必须在访问前初始化，访问后废除。
2.这里的时间统计仅仅针对controller入口的统计，也就是说，如果别的调用了service，这个时间是不统计的，因为StopWatch没有初始化。
3.StopWatch的prettyPrint是一个很好的东东
4.如果想要向开始那样，完全统计每层耗时，这个设计需要重新设计。当前有这样的想法。controller切点初始化三个或者多个StopWatch；service、repository等分别建立切点并计时；controller执行完毕之后的切点汇总统计数据，销毁各个StopWatch。这样就做到了每个层都统计了。然而问题来了，如果一个controller调用了多个service，显然需要统计所有service耗时和单个service耗时。
Boo! Big Bug!!!
今早起来接着看，忽然想起spring bean管理是单例的，而且必须是单例的才可以使用共同的成员变量，但问题来了，spring的controller是多线程的。也就是说，这个切面进入不是排队的，第一个请求过程中第二个请求也是可以进来的。那么，共享成员变量实在是愚蠢的决定。然而选择创建一个类来管理对应一个请求的计时器也不好的，如果并发量超级大岂不是每个人都会产生一个类？
因此，这个计时器必须是一个过程量，可以在指定区间（即controller执行期间）生存，而后销毁。对应的，显然是每个并发请求会至少产生一个类。也就是说，我需要在controller请求的时候new 一个StopWatch的id，然后在接下来的一系列调用中都使用这个id对应的计时器，最后销毁。如果几百万个并发量，那么就会产生几百万个类实例。懵逼。
最终选择
通过一个实例来保存一次请求状态太消耗性能，而如果不通过一个类实例保存状态就无法汇总所有的时间。所以这个方案不合适。那么，剩下日志和传入数据库。当下就先记录日志好了。记录想要记录的节点的时间：
package com.test.spring.aop.monitor;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch;
/**
* Created by miaorf on 2016/7/16.
*/
@Aspect
@Component
public class UserMonitor {
private static Logger logger = LoggerFactory.getLogger(UserMonitor.class);
@Pointcut("execution(* com.test.spring.aop.web.UserController.users())")
public void controllerPerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.service.impl.UserService.getAll())")
public void servicePerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.repository.impl.UserDao.getAll())")
public void repositoryPerformance() {
}
@Pointcut("execution(* com.test.spring.aop.domain.repository.impl.Connector.getSthFromRemote())")
public void connectorPerformance() {
}
@Around("controllerPerformance() || servicePerformance() || repositoryPerformance() || connectorPerformance()")
public Object watchPerformance(ProceedingJoinPoint joinPoint) throws Throwable {
Signature signature = joinPoint.getSignature();
logger.info("=================start {}=====================",signature.getName());
StopWatch stopWatch = new StopWatch("controller");
try {
if (stopWatch.isRunning()) {
stopWatch.stop();
}
stopWatch.start(signature.toString());
} catch (IllegalStateException e) {
logger.error("watch start error:", e);
}
Object proceed = joinPoint.proceed();
try {
if (stopWatch.isRunning()) {
stopWatch.stop();
logger.info(stopWatch.prettyPrint()+"\n================= end {}=====================",signature.getName());
}
} catch (IllegalStateException e) {
logger.error("watch end error:", e);
}
return proceed;
}
}
压力测试
1.建立test case
首先，测试controller：创建com.test.spring.aop.web.UserControllerTest
package com.test.spring.aop.web;
import com.test.spring.aop.Application;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultHandlers;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import static org.junit.Assert.*;
/**
* Created by miaorf on 2016/7/17.
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(Application.class)
@WebAppConfiguration
public class UserControllerTest {
@Autowired
private WebApplicationContext wac;
private MockMvc mockMvc;
@Before
public void setUp() {
mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
}
@Test
public void testUsers() throws Exception {
MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/user/all"))
.andExpect(MockMvcResultMatchers.status().isOk())
.andExpect(MockMvcResultMatchers.jsonPath("$[0].id").value(0))
// .andDo(MockMvcResultHandlers.print())
.andReturn();
}
@Test
public void testUsersConcurrent() throws Exception{
for (int i = 0; i < 10; i++) {
new Thread(() -> {
try {
mockMvc.perform(MockMvcRequestBuilders.get("/user/all")).andExpect(MockMvcResultMatchers.status().isOk());
} catch (Exception e) {
e.printStackTrace();
}
}).run();
}
}
}
不知道为啥，我的new Thread并没有并发执行，而是按顺序执行的。也就是说，虽然我new 10 个Thread，但还是一个接一个的运行。
改进
于是，我想采用线程池：
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@Test
public void testUsersConcurrent() throws Exception{
ThreadPoolExecutor executor = new ThreadPoolExecutor( 5 , 10 , 200 , TimeUnit.MILLISECONDS, new ArrayBlockingQueue 5 ));
//不能超过15
for ( int i = 0 ; i < 15 ; i++) {
executor.execute(()->{
try {
mockMvc.perform(MockMvcRequestBuilders.get( "/user/all" )).andExpect(MockMvcResultMatchers.status().isOk());
} catch (Exception e) {
e.printStackTrace();
}
});
}
//等待其他线程执行,方便查看控制台打印结果
Thread.sleep( 100000 );
}
|
这下就可以看到controller是多线程并发的了，因为瞬间就打印了10条controller访问日志，正好是线程池的最大容量：
016-07-17 12:20:10.336 INFO 12792 --- [ main] o.s.t.web.servlet.TestDispatcherServlet : FrameworkServlet '': initialization completed in 24 ms 2016-07-17 12:20:10.431 INFO 12792 --- [pool-1-thread-8] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.431 INFO 12792 --- [pool-1-thread-6] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.431 INFO 12792 --- [pool-1-thread-4] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.431 INFO 12792 --- [pool-1-thread-2] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [ool-1-thread-10] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [pool-1-thread-3] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [pool-1-thread-7] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [pool-1-thread-5] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [pool-1-thread-1] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:20:10.432 INFO 12792 --- [pool-1-thread-9] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()=====================
2.采用Apache 的ab进行并发访问
2.1下载Apache
参考：使用Apache Server 的ab进行web请求压力测试
2.2测试
D:\Java\httpd-2.4.23-x64-vc14\Apache24\bin>ab -n 20 -c 10 localhost:8080/user/all
This is ApacheBench, Version 2.3 <$Revision: 1748469 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking localhost (be patient).....done
Server Software: Apache-Coyote/1.1
Server Hostname: localhost
Server Port: 8080
Document Path: /user/all
Document Length: 1836671 bytes
Concurrency Level: 10
Time taken for tests: 31.199 seconds
Complete requests: 20
Failed requests: 0
Total transferred: 36736380 bytes
HTML transferred: 36733420 bytes
Requests per second: 0.64 [#/sec] (mean)
Time per request: 15599.677 [ms] (mean)
Time per request: 1559.968 [ms] (mean, across all concurrent requests)
Transfer rate: 1149.88 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.4 0 1
Processing: 14785 15524 600.3 16085 16148
Waiting: 14593 15310 505.1 15781 15831
Total: 14785 15524 600.3 16085 16148
Percentage of the requests served within a certain time (ms)
50% 16085
66% 16090
75% 16099
80% 16114
90% 16140
95% 16148
98% 16148
99% 16148
100% 16148 (longest request)
可以看到服务端是多线程的：
2016-07-17 12:26:28.455 INFO 18580 --- [ main] com.test.spring.aop.Application : Started Application in 8.37 seconds (JVM running for 9.23) 2016-07-17 12:26:40.966 INFO 18580 --- [nio-8080-exec-9] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet' 2016-07-17 12:26:40.966 INFO 18580 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started 2016-07-17 12:26:40.992 INFO 18580 --- [nio-8080-exec-9] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 25 ms 2016-07-17 12:26:41.049 INFO 18580 --- [nio-8080-exec-5] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.049 INFO 18580 --- [io-8080-exec-10] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.049 INFO 18580 --- [nio-8080-exec-8] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.050 INFO 18580 --- [nio-8080-exec-7] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.050 INFO 18580 --- [nio-8080-exec-2] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.050 INFO 18580 --- [nio-8080-exec-1] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.050 INFO 18580 --- [nio-8080-exec-3] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.050 INFO 18580 --- [nio-8080-exec-4] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.051 INFO 18580 --- [nio-8080-exec-6] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:41.051 INFO 18580 --- [nio-8080-exec-9] com.test.spring.aop.monitor.UserMonitor : =================start UserController.users()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-1] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-6] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-9] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [io-8080-exec-10] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-3] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-2] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-4] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.061 INFO 18580 --- [nio-8080-exec-8] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.062 INFO 18580 --- [nio-8080-exec-5] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:51.062 INFO 18580 --- [nio-8080-exec-7] com.test.spring.aop.monitor.UserMonitor : =================start IUserService.getAll()===================== 2016-07-17 12:26:52.062 INFO 18580 --- [nio-8080-exec-9] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.062 INFO 18580 --- [nio-8080-exec-6] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.062 INFO 18580 --- [nio-8080-exec-1] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [io-8080-exec-10] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-3] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-2] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-8] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-4] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-5] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:52.063 INFO 18580 --- [nio-8080-exec-7] com.test.spring.aop.monitor.UserMonitor : =================start IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.063 INFO 18580 --- [nio-8080-exec-6] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2000 ----------------------------------------- ms % Task name ----------------------------------------- 02000 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() ================= end IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.063 INFO 18580 --- [nio-8080-exec-9] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2001 ----------------------------------------- ms % Task name ----------------------------------------- 02001 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() ================= end IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.063 INFO 18580 --- [nio-8080-exec-3] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2000 ----------------------------------------- ms % Task name ----------------------------------------- 02000 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() ================= end IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.063 INFO 18580 --- [nio-8080-exec-1] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2000 ----------------------------------------- ms % Task name ----------------------------------------- 02000 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() ================= end IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.063 INFO 18580 --- [io-8080-exec-10] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2000 ----------------------------------------- ms % Task name ----------------------------------------- 02000 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote() ================= end IConnector.getSthFromRemote()===================== 2016-07-17 12:26:54.064 INFO 18580 --- [nio-8080-exec-4] com.test.spring.aop.monitor.UserMonitor : StopWatch 'controller': running time (millis) = 2001 ----------------------------------------- ms % Task name ----------------------------------------- 02001 100% Object com.test.spring.aop.domain.repository.IConnector.getSthFromRemote()
项目源码：https://github.com/chenxing12/spring-aop
http://www.cnblogs.com/woshimrf/p/5677337.html