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：

<?xml version="1.0" encoding="UTF-8"?>
<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</modelVersion>

    <groupId>com.test</groupId>
    <artifactId>spring-aop</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <!-- Import dependency management from Spring Boot -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.3.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <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>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.assertj</groupId>
            <artifactId>assertj-core-java8</artifactId>
            <version>1.0.0m1</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

1.3创建启动入口：com.test.spring.aop.Application.java

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);
    }
}

1.4发现我们需要一个service:

创建com.test.spring.aop.domain.service.IHelloService

package com.test.spring.aop.domain.service;

/**
 * Created by miaorf on 2016/7/16.
 */
public interface IHelloService {
    void sayHi();
}

创建com.test.spring.aop.domain.service.impl.HelloService

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

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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");
    }


}

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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;
    }
}

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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<User> users(){
        try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
        List<User> all = userService.getAll();
        return all;
    }
}

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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<User> getAll();
}

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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<User> getAll() {
        try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
        connector.getSthFromRemote();
        return userDao.getAll();
    }
}

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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<User> getAll();
}

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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<User> getAll() {
        //mock data
        List<User> list = new ArrayList<User>(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();
    }



}

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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();
}

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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;
    }
}

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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 + '\'' +
                '}';
    }
}

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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;

    }

}

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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;
    }

}

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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();
        }
    }

}

View Code

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：

 @Test
    public void testUsersConcurrent() throws  Exception{

        ThreadPoolExecutor executor = new ThreadPoolExecutor(5,10,200, TimeUnit.MILLISECONDS,new ArrayBlockingQueue<Runnable>(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()=====================

View Code

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)

View Code

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()

View Code

项目源码：https://github.com/chenxing12/spring-aop

唯有不断学习方能改变！ -- Ryan Miao

Spring-AOP实践 - 统计访问时间

其中，遇到的问题:

1.搭建项目

2.AOP - HelloWorld

3.时间统计

Boo! Big Bug!!!

最终选择

压力测试

1.建立test case

2.采用Apache 的ab进行并发访问

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