消息中间件系列五：RabbitMQ的使用场景（异步处理、应用解耦）
一、异步处理
场景：
用户注册，写入数据库成功以后，发送邮件和短信。
准备工作：
1）安装RabbitMQ，参考前面的文章
2）新建一个名为RabbitMQAsyncProc的maven web工程，在pom.xml文件里面引入如下依赖
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.study.demo</groupId>
<artifactId>RabbitMQAsyncProc</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>RabbitMQAsyncProc Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency> <dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.11.RELEASE</version>
</dependency> <dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <!--日志-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<!-- <dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.5</version>
</dependency>-->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-access</artifactId>
<version>1.0.13</version>
</dependency> <!--JSON-->
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency> <!-- RabbitMQ -->
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
<version>2.0.0.RELEASE</version>
</dependency> <!--使用AspectJ方式注解需要相应的包-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.12</version>
</dependency>
<!--使用AspectJ方式注解需要相应的包-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.12</version>
</dependency>
</dependencies>
<build>
<finalName>RabbitMQAsyncProc</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin> </plugins>
<resources>
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</build>
</project>
1. 新建一个用户信息实体
package com.study.demo.vo; import java.util.UUID; /**
*
* @Description: 用户信息实体
* @author liguangsheng
* @date 2018年9月18日
*
*/
public class User { private final String userId;
private final String userName;
private final String email;
private final String phoneNumber; public User(String userId, String userName, String email, String phoneNumber) {
this.userId = userId;
this.userName = userName;
this.email = email;
this.phoneNumber = phoneNumber;
} public String getUserId() {
return userId;
} public String getUserName() {
return userName;
} public String getEmail() {
return email;
} public String getPhoneNumber() {
return phoneNumber;
} public static User makeUser(String userName,String email,String phoneNumber){
String userId = UUID.randomUUID().toString();
return new User(userId,userName,email,phoneNumber);
} @Override
public String toString() {
return "User{" +
"userId='" + userId + '\'' +
", userName='" + userName + '\'' +
", email='" + email + '\'' +
", phoneNumber='" + phoneNumber + '\'' +
'}';
}
}
2. 新建一个用户注册接口
package com.study.demo.service; import com.study.demo.vo.User; /**
*
* @Description: 用户注册接口
* @author leeSmall
* @date 2018年9月18日
*
*/
public interface IUserReg { public boolean userRegister(User user); }
3. 新建三个业务类
1）保存用户数据到数据库
package com.study.demo.service.busi; import java.util.concurrent.ConcurrentHashMap; import org.springframework.stereotype.Service; import com.study.demo.vo.User; /**
*
* @Description: 保存用户数据到数据库
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
public class SaveUser { private ConcurrentHashMap<String,User> userData =
new ConcurrentHashMap<String, User>(); public void saveUser(User user){
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
userData.putIfAbsent(user.getUserId(),user);
} public User getUser(String userId){
return userData.get(userId);
} }
2）发送邮件的服务
package com.study.demo.service.busi; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service; /**
*
* @Description: 发送邮件的服务
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
public class SendEmail {
private Logger logger = LoggerFactory.getLogger(SendEmail.class); public void sendEmail(String email){
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
logger.info("-------------Already Send email to "+email);
} }
3）发送短信的服务
package com.study.demo.service.busi; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service; /**
*
* @Description: 发送短信的服务
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
public class SendSms { private Logger logger = LoggerFactory.getLogger(SendSms.class); public void sendSms(String phoneNumber){
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
logger.info("-------------Already Send Sms to "+phoneNumber);
} }
4. 新建/RabbitMQAsyncProc/src/main/java/applicationContext.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://www.springframework.org/schema/rabbit
http://www.springframework.org/schema/rabbit/spring-rabbit-2.0.xsd"> <aop:aspectj-autoproxy /> <!-- 配置扫描路径 -->
<context:component-scan base-package="com.study.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> <!-- rabbitMQ配置 -->
<bean id="rabbitConnectionFactory"
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="127.0.0.1"/>
<property name="username" value="guest"/>
<property name="password" value="guest"/>
<property name="channelCacheSize" value="8"/>
<property name="port" value="5672"></property>
</bean>
<rabbit:admin connection-factory="rabbitConnectionFactory"/> <!--邮件相关队列-->
<rabbit:queue name="email_queue" durable="false"/>
<!--短信相关队列-->
<rabbit:queue name="sms_queue" durable="false"/> <!--将队列和交换器通过路由键绑定-->
<rabbit:direct-exchange name="user-reg-exchange"
xmlns="http://www.springframework.org/schema/rabbit"
durable="true">
<rabbit:bindings>
<rabbit:binding queue="email_queue" key="email" ></rabbit:binding>
<rabbit:binding queue="sms_queue" key="sms" ></rabbit:binding>
</rabbit:bindings>
</rabbit:direct-exchange> <!-- 创建rabbitTemplate 消息模板类 -->
<bean id="rabbitTemplate" class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<constructor-arg ref="rabbitConnectionFactory"></constructor-arg>
</bean> </beans>
5. 新建一个串行的用户注册实现类
package com.study.demo.service.impl; import com.study.demo.service.IUserReg;
import com.study.demo.service.busi.SaveUser;
import com.study.demo.service.busi.SendEmail;
import com.study.demo.service.busi.SendSms;
import com.study.demo.vo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service; /**
*
* @Description: 串行的用户注册
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
@Qualifier("serial")
public class SerialProcess implements IUserReg { @Autowired
private SaveUser saveUser;
@Autowired
private SendEmail sendEmail;
@Autowired
private SendSms sendSms; public boolean userRegister(User user) {
try {
saveUser.saveUser(user);
sendEmail.sendEmail(user.getEmail());
sendSms.sendSms(user.getPhoneNumber());
return true;
} catch (Exception e) {
return false;
}
}
}
6. 新建一个并行的用户注册实现类
package com.study.demo.service.impl; import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service; import com.study.demo.service.IUserReg;
import com.study.demo.service.busi.SaveUser;
import com.study.demo.service.busi.SendEmail;
import com.study.demo.service.busi.SendSms;
import com.study.demo.vo.User; /**
*
* @Description: 并行的用户注册
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
@Qualifier("para")
public class ParalllerProcess implements IUserReg { private static Logger logger = LoggerFactory.getLogger(ParalllerProcess.class); @Autowired
private SaveUser saveUser;
@Autowired
private SendEmail sendEmail;
@Autowired
private SendSms sendSms; //发送邮件的线程
private static class SendEmailThread implements Callable<Boolean>{ private SendEmail sendEmail;
private String email; public SendEmailThread(SendEmail sendEmail, String email) {
this.sendEmail = sendEmail;
this.email = email;
} public Boolean call() throws Exception {
sendEmail.sendEmail(email);
logger.info("SendEmailThread send mail to"+email);
return true;
}
} //发送短信的线程
private static class SendSmsThread implements Callable<Boolean>{ private SendSms sendSms;
private String phoneNumber; public SendSmsThread(SendSms sendSms, String phoneNumber) {
this.sendSms = sendSms;
this.phoneNumber = phoneNumber;
} public Boolean call() throws Exception {
sendSms.sendSms(phoneNumber);
logger.info("SendSmsThread send mail to"+phoneNumber);
return true;
}
} public boolean userRegister(User user) {
FutureTask<Boolean> sendEmailFuture =
new FutureTask<Boolean>(new SendEmailThread(sendEmail,user.getEmail()));
FutureTask<Boolean> sendSmsFuture =
new FutureTask<Boolean>(new SendSmsThread(sendSms,user.getPhoneNumber()));
try {
saveUser.saveUser(user);
new Thread(sendEmailFuture).start();
new Thread(sendSmsFuture).start();
sendEmailFuture.get();//获取邮件发送的结果
sendSmsFuture.get();//获取短信发送的结果
return true;
} catch (Exception e) {
logger.error(e.toString());
return false;
} }
}
7. 新建一个RabbitMQ实现的异步用户注册
package com.study.demo.service.impl; import com.study.demo.service.IUserReg;
import com.study.demo.service.busi.SaveUser;
import com.study.demo.vo.User;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.AmqpException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service; /**
*
* @Description: RabbitMQ实现的异步用户注册
* @author leeSmall
* @date 2018年9月18日
*
*/
@Service
@Qualifier("async")
public class AsyncProcess implements IUserReg{ private Logger logger = LoggerFactory.getLogger(AsyncProcess.class); @Autowired
private RabbitTemplate rabbitTemplate;
@Autowired
private SaveUser saveUser; public boolean userRegister(User user) {
try {
saveUser.saveUser(user);
rabbitTemplate.send("user-reg-exchange","email",
new Message(user.getEmail().getBytes(),new MessageProperties()));
rabbitTemplate.send("user-reg-exchange","sms",
new Message(user.getEmail().getBytes(),new MessageProperties()));
} catch (AmqpException e) {
logger.error(e.toString());
return false;
} return true;
}
}
8.新建一个RabbitMQ消息消费端监听邮件消息类
package com.study.demo.service.mq; import com.study.demo.service.busi.SendEmail;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component; /**
*
* @Description: RabbitMQ消息消费端监听邮件消息类
* @author leeSmall
* @date 2018年9月18日
*
*/
@Component
public class ProcessUserEmail implements MessageListener { private Logger logger = LoggerFactory.getLogger(ProcessUserEmail.class); @Autowired
private SendEmail sendEmail; public void onMessage(Message message) {
logger.info("accept message,ready process......");
sendEmail.sendEmail(new String(message.getBody())); }
}
在/RabbitMQAsyncProc/src/main/java/applicationContext.xml添加邮件消息监听类配置：
<rabbit:listener-container connection-factory="rabbitConnectionFactory">
<rabbit:listener queues="email_queue" ref="processUserEmail"
method="onMessage"/>
</rabbit:listener-container>
9. 新建一个RabbitMQ消息消费端监听sms消息类
package com.study.demo.service.mq; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component; import com.study.demo.service.busi.SendSms; /**
*
* @Description: RabbitMQ消息消费端监听sms消息类
* @author leeSmall
* @date 2018年9月18日
*
*/
@Component
public class ProcessUserSms implements MessageListener { private Logger logger = LoggerFactory.getLogger(ProcessUserSms.class); @Autowired
private SendSms sendSms; public void onMessage(Message message) {
logger.info("accept message,ready process......");
sendSms.sendSms(new String(message.getBody())); }
}
在/RabbitMQAsyncProc/src/main/java/applicationContext.xml添加短信消息监听类配置：
<rabbit:listener-container connection-factory="rabbitConnectionFactory">
<rabbit:listener queues="email_queue" ref="processUserEmail"
method="onMessage"/>
<rabbit:listener queues="sms_queue" ref="processUserSms"
method="onMessage"/>
</rabbit:listener-container>
10. 新建一个统计花费时间工具类
package com.study.demo.tools; import org.aspectj.lang.ProceedingJoinPoint;
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.Service; import com.study.demo.vo.User; /**
*
* @Description: 统计花费时间工具类
* @author leeSmall
* @date 2018年9月18日
*
*/
@Aspect
@Service
public class StatTime { private Logger logger = LoggerFactory.getLogger(StatTime.class);
private User user; public StatTime() {
logger.info("************Aop开启");
} @Pointcut("execution(* com.study.demo.service.impl.*.*Register(..))")
public void stat(){} @Around("stat()&&args(user)")
public Object statTime(ProceedingJoinPoint proceedingJoinPoint,User user){
this.user = user;
long start = System.currentTimeMillis();
Object result = null;
try {
result = proceedingJoinPoint.proceed(new Object[]{this.user});
} catch (Throwable throwable) {
throwable.printStackTrace();
}
logger.info("************spend time : "+(System.currentTimeMillis()-start)+"ms");
return result; } }
11. 新建一个用户注册控制器
package com.study.demo.controller; import com.study.demo.service.IUserReg;
import com.study.demo.vo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody; /**
*
* @Description: 用户注册控制器
* @author leeSmall
* @date 2018年9月18日
*
*/
@Controller
public class UserRegController { private static final String SUCCESS = "suc";
private static final String FAILUER = "failure"; @Autowired
@Qualifier("serial")
private IUserReg userReg; @RequestMapping("/userReg")
public String userReg(){
return "index";
} @RequestMapping("/saveUser")
@ResponseBody
public String saveUser(@RequestParam("userName")String userName,
@RequestParam("email")String email,
@RequestParam("phoneNumber")String phoneNumber){
try {
if (userReg.userRegister(User.makeUser(userName,email,phoneNumber)))
return SUCCESS;
else
return FAILUER;
} catch (Exception e) {
return FAILUER;
}
} }
12. 新建/RabbitMQAsyncProc/src/main/java/spring-mvc.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <!-- <mvc:default-servlet-handler />-->
<mvc:resources mapping="/js/**" location="/js/"/>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager" /> <context:component-scan base-package="com.study.demo.controller">
<!-- <context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller" />-->
</context:component-scan> <bean id="stringHttpMessageConverter"
class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text" />
<constructor-arg index="1" value="plain" />
<constructor-arg index="2" value="UTF-8" />
</bean>
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /> <bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringHttpMessageConverter" />
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean> <bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="mediaTypes">
<map>
<entry key="html" value="text/html" />
<entry key="pdf" value="application/pdf" />
<entry key="xsl" value="application/vnd.ms-excel" />
<entry key="xml" value="application/xml" />
<entry key="json" value="application/json" />
</map>
</property>
<property name="defaultContentType" value="text/html" />
</bean> <bean id="viewResolver"
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="0" />
<property name="contentNegotiationManager" ref="contentNegotiationManager" /> <property name="viewResolvers">
<list>
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp"></property>
</bean>
</list>
</property> <property name="defaultViews">
<list>
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
<property name="extractValueFromSingleKeyModel" value="true" />
</bean>
</list>
</property>
</bean> </beans>
13. 新建一个/RabbitMQAsyncProc/src/main/webapp/WEB-INF/views/index.jsp页面
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
System.out.println(path);
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
System.out.println(basePath);
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>用户注册-异步模式</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<script type="text/javascript" src="<%--<%=basePath%>--%>resources/js/jquery-1.11.0.min.js"></script>
<style type="text/css">
.h1 {
margin: 0 auto;
} #producer{
width: 48%;
border: 1px solid blue;
height: 80%;
align:center;
margin:0 auto;
} body{
text-align :center;
}
div {
text-align :center;
}
textarea{
width:80%;
height:100px;
border:1px solid gray;
}
button{
background-color: rgb(62, 156, 66);
border: none;
font-weight: bold;
color: white;
height:30px;
}
</style>
<script type="text/javascript"> function send(){
$.ajax({
type: 'get',
url:'<%=basePath%>saveUser?userName='+$("#userName").val()
+'&email='+$("#userEmail").val()+'&phoneNumber='+$("#userNumber").val(),
dataType:'text',
success:function(data){
if(data=="suc"){
alert("注册成功！");
}else{
alert("注册失败！");
}
},
error:function(data){
alert("注册错误！");
} });
}
</script>
</head> <body>
<h1>用户注册-异步模式</h1>
<div id="producer">
用户姓名：<input type="text" id="userName"/>
<br>
用户邮件：<input type="text" id="userEmail"/>
<br>
用户手机：<input type="text" id="userNumber"/>
<br>
<button onclick="send()">注 册</button>
<br>
</div>
</body>
</html>
14. 新建/RabbitMQAsyncProc/src/main/webapp/WEB-INF/web.xml配置文件
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>RabbitMqSpringProducerDemo</display-name> <servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping> <!-- Spring 编码过滤器 start -->
<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring 编码过滤器 End --> <!-- Spring Application Context Listener Start -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring Application Context Listener End --> <!-- Spring MVC Config Start -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<!-- Filter all resources -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring MVC Config End --> </web-app>
到此代码别写完成！
15. 在Tomcat v8.5 8080里面启动RabbitMQAsyncProc
首次启动时用户注册接口时串行的
@Autowired
@Qualifier("serial")
private IUserReg userReg;
在浏览器输入地址http://localhost:8080/RabbitMQAsyncProc/userReg访问进行用户注册
查看控制台状态：
修改用户注册接口为并行的：
@Autowired
@Qualifier("para")
private IUserReg userReg;
在用户界面注册 查看控制台状态：
修改用户注册接口为RabbitMQ异步实现的的：
@Autowired
@Qualifier("async")
private IUserReg userReg;
在用户界面注册 查看控制台状态：
总结：
串行模式 ************spend time : 251ms
并行模式 ************spend time : 153ms
消息队列模式：************spend time : 59ms
所以RabbitMQ异步处理的性能最快
二、应用解耦
场景：
用户下订单买商品，订单成功了，去扣减库存，库存必须扣减完成，没有库存，库存低于某个阈值，可以扣减成功，要通知其他系统（如采购系统尽快采购，用户订单系统我们尽快调货）
RPC实现。库存系统失败，订单系统也无法成功，订单系统和库存系统耦合了。所以要缓存消息中间件来解耦。发送一个扣减库存的消息，保证消息必须被库存系统处理。
三个问题要解决：
1）订单系统发给MQ服务器的消息，必须被MO服务器接收到（事物、发送者确认）
2）MQ服务器拿到消息以后，消息被正常处理以前必须保存住（持久化）
3）某个库存服务出现了异常，消息要能够被其他库存系统处理（消费者确认，消息监听类要实现ChannelAwareMessageListener）
订单系统一定要知道库存系统是否处理成功怎么办？
库存系统和订单系统之间建立一个消息通道，库存系统去通知订单系统
准备工作：
1）安装RabbitMQ，参考前面的文章
2）分别新建名为RabbitMQOrder和RabbitMQDepot的两个maven web工程，在pom,xml文件里面引入一些依赖
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.study.demo</groupId>
<artifactId>RabbitMQOrder</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>RabbitMQOrder Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency> <dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.11.RELEASE</version>
</dependency> <dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <!--日志 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-access</artifactId>
<version>1.0.13</version>
</dependency> <!--JSON -->
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency> <dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.2</version>
</dependency> <!-- RabbitMQ -->
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
<version>2.0.0.RELEASE</version>
</dependency> <!--使用AspectJ方式注解需要相应的包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.12</version>
</dependency>
<!--使用AspectJ方式注解需要相应的包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.12</version>
</dependency>
</dependencies>
<build>
<finalName>RabbitMQOrder</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin> </plugins>
<resources>
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</build>
</project>
编写订单系统RabbitMQOrder代码：
1. 在工程RabbitMQOrder新建一个商品实体
package com.study.demo.vo; import java.io.Serializable; /**
*
* @Description: 商品实体
* @author leeSmall
* @date 2018年9月19日
*
*/
public class GoodTransferVo implements Serializable { private static final long serialVersionUID = 7702481109435751937L; /**
* 商品id
*/
private String goodsId; /**
* 改变的库存量
*/
private int changeAmount; /**
* 入库或者出库
*/
private boolean inOrOut; public String getGoodsId() {
return goodsId;
} public void setGoodsId(String goodsId) {
this.goodsId = goodsId;
} public int getChangeAmount() {
return changeAmount;
} public void setChangeAmount(int changeAmount) {
this.changeAmount = changeAmount;
} public boolean isInOrOut() {
return inOrOut;
} public void setInOrOut(boolean inOrOut) {
this.inOrOut = inOrOut;
}
}
2. 在工程RabbitMQOrder新建一个处理库存接口
package com.study.demo.service; /**
*
* @Description: 处理库存接口
* @author leeSmall
* @date 2018年9月19日
*
*/
public interface IProDepot { public void processDepot(String goodsId,int amount); }
3. 在工程RabbitMQOrder新建一个/RabbitMQOrder/src/main/java/applicationContext.xml配置文件，配置RabbitMQ
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-2.0.xsd"> <!-- 配置扫描路径 -->
<context:component-scan base-package="com.study.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> <!-- rabbitMQ配置 -->
<bean id="rabbitConnectionFactory"
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="127.0.0.1"/>
<property name="username" value="guest"/>
<property name="password" value="guest"/>
<property name="channelCacheSize" value="8"/>
<property name="port" value="5672"></property>
</bean>
<rabbit:admin connection-factory="rabbitConnectionFactory"/> <rabbit:queue name="depot_queue" durable="true"/> <!--队列通过路由键和交换器绑定 -->
<rabbit:direct-exchange name="depot-amount-exchange"
xmlns="http://www.springframework.org/schema/rabbit" durable="true">
<rabbit:bindings>
<rabbit:binding queue="depot_queue" key="amount.depot" ></rabbit:binding>
</rabbit:bindings>
</rabbit:direct-exchange> <!-- 创建rabbitTemplate 消息模板类 -->
<bean id="rabbitTemplate" class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<constructor-arg ref="rabbitConnectionFactory"></constructor-arg>
</bean> </beans>
4. 在工程RabbitMQOrder新建一个RabbitMQ处理库存接口的实现类
package com.study.demo.service; import com.study.demo.vo.GoodTransferVo;
import com.google.gson.Gson;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageDeliveryMode;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service; /**
*
* @Description: RabbitMQ处理库存接口的实现类
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
@Qualifier("mq")
public class MqMode implements IProDepot { private final static String DEPOT_RK = "amount.depot";
private final static String DEPOT_EXCHANGE = "depot-amount-exchange"; @Autowired
RabbitTemplate rabbitTemplate; private static Gson gson = new Gson(); public void processDepot(String goodsId, int amount) {
GoodTransferVo goodTransferVo = new GoodTransferVo();
goodTransferVo.setGoodsId(goodsId);
goodTransferVo.setChangeAmount(amount);
goodTransferVo.setInOrOut(false);
String goods = gson.toJson(goodTransferVo);
MessageProperties messageProperties = new MessageProperties();
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
rabbitTemplate.send(DEPOT_EXCHANGE, DEPOT_RK,
new Message(goods.getBytes(), messageProperties));
}
}
5. 在工程RabbitMQOrder新建一个处理订单业务类
package com.study.demo.service; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service; /**
*
* @Description: 处理订单业务类
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class ProcessOrder {
private Logger logger = LoggerFactory.getLogger(ProcessOrder.class); @Autowired
@Qualifier("mq")
private IProDepot proDepot; public void processOrder(String goodsId,int amount){
try {
Thread.sleep(80);
} catch (InterruptedException e) {
e.printStackTrace();
}
logger.info("--------------------["+goodsId+"]订单入库完成，准备变动库存！");
proDepot.processDepot(goodsId,amount); } }
6. 在工程RabbitMQOrder新建一个RabbitMQ发送者确认
package com.study.demo.service.callback; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.stereotype.Service; /**
*
* @Description: RabbitMQ发送者确认
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class ConfirmCallback implements RabbitTemplate.ConfirmCallback {
private Logger logger = LoggerFactory.getLogger(ConfirmCallback.class); public void confirm(CorrelationData correlationData, boolean ack, String cause) {
if (ack) {
logger.info("消息确认发送给mq成功");
} else {
//处理失败的消息
logger.info("消息发送给mq失败,考虑重发:"+cause);
}
}
}
7. 在工程RabbitMQOrder新建一个RabbitMQ返回确认
package com.study.demo.service.callback; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.stereotype.Service; /**
*
* @Description: RabbitMQ返回确认-RabbitMQ服务内部出错时回调
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class SendReturnCallback implements RabbitTemplate.ReturnCallback { private Logger logger = LoggerFactory.getLogger(SendReturnCallback.class); public void returnedMessage(Message message, int replyCode,
String replyText, String exchange,
String routingKey) {
logger.info("Returned replyText："+replyText);
logger.info("Returned exchange："+exchange);
logger.info("Returned routingKey："+routingKey);
String msgJson = new String(message.getBody());
logger.info("Returned Message："+msgJson);
}
}
8. 在/RabbitMQOrder/src/main/java/applicationContext.xml配置文件新增RabbitMQ发送者确认和RabbitMQ返回确认配置
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-2.0.xsd"> <!-- 配置扫描路径 -->
<context:component-scan base-package="com.study.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> <!-- rabbitMQ配置 -->
<bean id="rabbitConnectionFactory"
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="127.0.0.1"/>
<property name="username" value="guest"/>
<property name="password" value="guest"/>
<property name="channelCacheSize" value="8"/>
<property name="port" value="5672"></property>
<!-- 发布确认必须配置在CachingConnectionFactory上 -->
<property name="publisherConfirms" value="true"/>
</bean>
<rabbit:admin connection-factory="rabbitConnectionFactory"/> <rabbit:queue name="depot_queue" durable="true"/> <!--队列通过路由键和交换器绑定 -->
<rabbit:direct-exchange name="depot-amount-exchange"
xmlns="http://www.springframework.org/schema/rabbit" durable="true">
<rabbit:bindings>
<rabbit:binding queue="depot_queue" key="amount.depot" ></rabbit:binding>
</rabbit:bindings>
</rabbit:direct-exchange> <!-- 创建rabbitTemplate 消息模板类 -->
<bean id="rabbitTemplate" class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<constructor-arg ref="rabbitConnectionFactory"></constructor-arg>
<!--消息确认回调 -->
<property name="confirmCallback" ref="confirmCallback"/>
<property name="returnCallback" ref="sendReturnCallback"/>
</bean> </beans>
9. 在工程RabbitMQOrder新建一个订单业务控制器
package com.study.demo.controller; import com.study.demo.service.ProcessOrder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody; /**
*
* @Description: 订单业务控制器
* @author leeSmall
* @date 2018年9月19日
*
*/
@Controller
public class OrderController { private Logger logger = LoggerFactory.getLogger(OrderController.class);
private static final String SUCCESS = "suc";
private static final String FAILUER = "failure"; @Autowired
private ProcessOrder processOrder; @RequestMapping("/order")
public String order(){
return "index";
} @RequestMapping("/confirmOrder")
@ResponseBody
public String confirmOrder(@RequestParam("goodsId")String goodsId,
@RequestParam("amount")int amount){
try {
processOrder.processOrder(goodsId,amount);
return SUCCESS;
} catch (Exception e) {
logger.error("订单确认异常！",e);
return FAILUER;
}
} }
10. 新增/RabbitMQOrder/src/main/java/spring-mvc.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <!-- <mvc:default-servlet-handler />-->
<mvc:resources mapping="/js/**" location="/js/"/>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager" /> <context:component-scan base-package="com.study.demo.controller">
<!-- <context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller" />-->
</context:component-scan> <bean id="stringHttpMessageConverter"
class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text" />
<constructor-arg index="1" value="plain" />
<constructor-arg index="2" value="UTF-8" />
</bean>
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /> <bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringHttpMessageConverter" />
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean> <bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="mediaTypes">
<map>
<entry key="html" value="text/html" />
<entry key="pdf" value="application/pdf" />
<entry key="xsl" value="application/vnd.ms-excel" />
<entry key="xml" value="application/xml" />
<entry key="json" value="application/json" />
</map>
</property>
<property name="defaultContentType" value="text/html" />
</bean> <bean id="viewResolver"
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="0" />
<property name="contentNegotiationManager" ref="contentNegotiationManager" /> <property name="viewResolvers">
<list>
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp"></property>
</bean>
</list>
</property> <property name="defaultViews">
<list>
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
<property name="extractValueFromSingleKeyModel" value="true" />
</bean>
</list>
</property>
</bean> </beans>
11. 新增/RabbitMQOrder/src/main/webapp/WEB-INF/views/index.jsp页面模拟下订单
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
System.out.println(path);
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
System.out.println(basePath);
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>订单提交</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<script type="text/javascript" src="<%--<%=basePath%>--%>resources/js/jquery-1.11.0.min.js"></script>
<style type="text/css">
.h1 {
margin: 0 auto;
} #producer{
width: 48%;
border: 1px solid blue;
height: 80%;
align:center;
margin:0 auto;
} body{
text-align :center;
}
div {
text-align :center;
}
textarea{
width:80%;
height:100px;
border:1px solid gray;
}
button{
background-color: rgb(62, 156, 66);
border: none;
font-weight: bold;
color: white;
height:30px;
}
</style>
<script type="text/javascript"> function send(){
$.ajax({
type: 'get',
url:'<%=basePath%>confirmOrder?goodsId='+$("#goods").val()
+'&amount='+$("#amount").val(),
dataType:'text',
success:function(data){
if(data=="suc"){
alert("提交成功！");
}else{
alert("提交失败！");
}
},
error:function(data){
alert("提交错误！");
} });
}
</script>
</head> <body>
<h1>确认提交订单</h1>
<div id="producer">
商品编号：<input type="text" id="goods"/>
<br>
订单数量：<input type="text" id="amount"/>
<br>
<button onclick="send()">确 认</button>
<br>
</div>
</body>
</html>
12.新增 /RabbitMQOrder/src/main/webapp/WEB-INF/web.xml配置文件
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>RabbitMQOrder</display-name> <servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping> <!-- Spring 编码过滤器 start -->
<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring 编码过滤器 End --> <!-- Spring Application Context Listener Start -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring Application Context Listener End --> <!-- Spring MVC Config Start -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<!-- Filter all resources -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring MVC Config End --> </web-app>
到此订单系统代码编写完成！
13. 在Tomcat v8.5 8080里面启动RabbitMQOrder，输入地址http://localhost:8080/RabbitMQOrder/order访问
编写库存系统RabbitMQDepot代码：
1. 在工程RabbitMQDepot 新建一个商品实体
package com.study.demo.vo; import java.io.Serializable; /**
*
* @Description: 商品实体
* @author leeSmall
* @date 2018年9月19日
*
*/
public class GoodTransferVo implements Serializable { private static final long serialVersionUID = 7702481109435751937L; /**
* 商品id
*/
private String goodsId; /**
* 改变的库存量
*/
private int changeAmount; /**
* 入库或者出库
*/
private boolean inOrOut; public String getGoodsId() {
return goodsId;
} public void setGoodsId(String goodsId) {
this.goodsId = goodsId;
} public int getChangeAmount() {
return changeAmount;
} public void setChangeAmount(int changeAmount) {
this.changeAmount = changeAmount;
} public boolean isInOrOut() {
return inOrOut;
} public void setInOrOut(boolean inOrOut) {
this.inOrOut = inOrOut;
}
}
2. 在工程RabbitMQDepot 新建一个库存数据服务
package com.study.demo.service; import java.util.concurrent.ConcurrentHashMap;
import java.util.function.BiFunction; import javax.annotation.PostConstruct; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service; /**
*
* @Description: 库存数据服务
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class Depot { private static Logger logger = LoggerFactory.getLogger(Depot.class); private ConcurrentHashMap<String,Integer> goodsData =
new ConcurrentHashMap<String, Integer>(); @PostConstruct
public void initDepot(){
goodsData.put("001",1000);
goodsData.put("002",500);
goodsData.put("003",600);
goodsData.put("004",700);
} //增加库存
public void inDepot(String goodsId,int addAmout){
logger.info("+++++++++++++++++增加商品："+goodsId+"库存,数量为："+addAmout);
int newValue = goodsData.compute(goodsId, new BiFunction<String, Integer, Integer>() {
public Integer apply(String s, Integer integer) {
return integer == null ? addAmout : integer + addAmout;
}
});
logger.info("+++++++++++++++++商品："+goodsId+"库存,数量变为："+newValue);
} //减少库存
public void outDepot(String goodsId,int reduceAmout){
logger.info("-------------------减少商品："+goodsId+"库存,数量为："+reduceAmout);
int newValue = goodsData.compute(goodsId, new BiFunction<String, Integer, Integer>() {
public Integer apply(String s, Integer integer) {
return integer == null ? 0 : integer - reduceAmout;
}
});
logger.info("-------------------商品："+goodsId+"库存,数量变为："+newValue);
} public int getGoodsAmount(String goodsId){
return goodsData.get(goodsId);
}
}
3. 在工程RabbitMQDepot 新建一个库存服务管理
package com.study.demo.service; import com.study.demo.vo.GoodTransferVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service; /**
*
* @Description: 库存服务管理
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class DepotManager { @Autowired
private Depot depot; public void operDepot(GoodTransferVo goodTransferVo){
if(goodTransferVo.isInOrOut()){
depot.inDepot(goodTransferVo.getGoodsId(),goodTransferVo.getChangeAmount());
}else{
depot.outDepot(goodTransferVo.getGoodsId(),goodTransferVo.getChangeAmount());
}
} }
4. 新建/RabbitMQDepot/src/main/java/applicationContext.xml配置文件，配置RabbitMQ
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-2.0.xsd"> <!-- 配置扫描路径 -->
<context:component-scan base-package="com.study.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> <!-- rabbitMQ配置 -->
<bean id="rabbitConnectionFactory"
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="127.0.0.1"/>
<property name="username" value="guest"/>
<property name="password" value="guest"/>
<property name="channelCacheSize" value="8"/>
<property name="port" value="5672"></property>
</bean>
<rabbit:admin connection-factory="rabbitConnectionFactory"/> <!--配置队列 -->
<rabbit:queue name="depot_queue" durable="true"/> <!--队列和交换器绑定 -->
<rabbit:direct-exchange name="depot-amount-exchange"
xmlns="http://www.springframework.org/schema/rabbit" durable="true">
<rabbit:bindings>
<rabbit:binding queue="depot_queue" key="amount.depot" ></rabbit:binding>
</rabbit:bindings>
</rabbit:direct-exchange> <!-- 对消息要手动确认 -->
<rabbit:listener-container connection-factory="rabbitConnectionFactory"
acknowledge="manual"> </rabbit:listener-container> </beans>
5. 在工程RabbitMQDepot 新建一个消息机制处理库存类
package com.study.demo.mq; import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.core.ChannelAwareMessageListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service; import com.google.gson.Gson;
import com.rabbitmq.client.Channel;
import com.study.demo.service.DepotManager;
import com.study.demo.vo.GoodTransferVo; /**
*
* @Description: 消息机制处理库存
* @author leeSmall
* @date 2018年9月19日
*
*/
@Service
public class ProcessDepot implements ChannelAwareMessageListener { private static Logger logger = LoggerFactory.getLogger(ProcessDepot.class); @Autowired
private DepotManager depotManager; private static Gson gson = new Gson(); @Override
public void onMessage(Message message, Channel channel) throws Exception {
try {
String msg = new String(message.getBody());
logger.info(">>>>>>>>>>>>>>接收到消息:"+msg);
GoodTransferVo goodTransferVo = gson.fromJson(msg,GoodTransferVo.class);
try {
depotManager.operDepot(goodTransferVo);
channel.basicAck(message.getMessageProperties().getDeliveryTag(),
false);
logger.info(">>>>>>>>>>>>>>库存处理完成，应答Mq服务");
} catch (Exception e) {
logger.error(e.getMessage());
channel.basicNack(message.getMessageProperties().getDeliveryTag(),
false,true);
logger.info(">>>>>>>>>>>>>>库存处理失败，拒绝消息，要求Mq重新派发");
throw e;
} } catch (Exception e) {
logger.error(e.getMessage());
}
} }
6. 在/RabbitMQDepot/src/main/java/applicationContext.xml配置消息机制处理库存
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-2.0.xsd"> <!-- 配置扫描路径 -->
<context:component-scan base-package="com.study.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> <!-- rabbitMQ配置 -->
<bean id="rabbitConnectionFactory"
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="127.0.0.1"/>
<property name="username" value="guest"/>
<property name="password" value="guest"/>
<property name="channelCacheSize" value="8"/>
<property name="port" value="5672"></property>
</bean>
<rabbit:admin connection-factory="rabbitConnectionFactory"/> <!--配置队列 -->
<rabbit:queue name="depot_queue" durable="true"/> <!--队列和交换器绑定 -->
<rabbit:direct-exchange name="depot-amount-exchange"
xmlns="http://www.springframework.org/schema/rabbit" durable="true">
<rabbit:bindings>
<rabbit:binding queue="depot_queue" key="amount.depot" ></rabbit:binding>
</rabbit:bindings>
</rabbit:direct-exchange> <!-- 对消息要手动确认 -->
<rabbit:listener-container connection-factory="rabbitConnectionFactory"
acknowledge="manual">
<rabbit:listener queues="depot_queue" ref="processDepot"
method="onMessage" />
</rabbit:listener-container> </beans>
7. 新增/RabbitMQDepot/src/main/java/spring-mvc.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!-- 查找最新的schemaLocation 访问 http://www.springframework.org/schema/ -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <!-- <mvc:default-servlet-handler />-->
<mvc:resources mapping="/js/**" location="/js/"/>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager" /> <context:component-scan base-package="com.study.demo.controller">
<!-- <context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller" />-->
</context:component-scan> <bean id="stringHttpMessageConverter"
class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text" />
<constructor-arg index="1" value="plain" />
<constructor-arg index="2" value="UTF-8" />
</bean>
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /> <bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringHttpMessageConverter" />
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean> <bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="mediaTypes">
<map>
<entry key="html" value="text/html" />
<entry key="pdf" value="application/pdf" />
<entry key="xsl" value="application/vnd.ms-excel" />
<entry key="xml" value="application/xml" />
<entry key="json" value="application/json" />
</map>
</property>
<property name="defaultContentType" value="text/html" />
</bean> <bean id="viewResolver"
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="0" />
<property name="contentNegotiationManager" ref="contentNegotiationManager" /> <property name="viewResolvers">
<list>
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp"></property>
</bean>
</list>
</property> <property name="defaultViews">
<list>
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
<property name="extractValueFromSingleKeyModel" value="true" />
</bean>
</list>
</property>
</bean> </beans>
8. 新增/RabbitMQDepot/src/main/webapp/WEB-INF/web.xml配置文件
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>RabbitMQDepot</display-name> <servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping> <!-- Spring 编码过滤器 start -->
<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring 编码过滤器 End --> <!-- Spring Application Context Listener Start -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring Application Context Listener End --> <!-- Spring MVC Config Start -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<!-- Filter all resources -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring MVC Config End --> </web-app>
到此库存系统代码编写完成！
9. 在Tomcat v8.5 8081启动RabbitMQDepot
10. 在下订单页面模拟下订单，查看控制台状态
库存系统状态：
订单系统状态：
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