尚好房 04_服务拆分

尚好房：服务拆分

一、业务介绍

1、项目模块划分

根据前面的介绍，目前我们的系统规划了3个dubbo服务提供者模块：权限服务、房源服务与会员服务，及2个服务消费者模块：尚好房管理平台（web-admin）与网站前端（web-front）

2、服务调用关系

3、项目拆分说明

当前我们项目为单体的SSM项目，目前开发了权限管理的用户管理与角色管理，接着要开发房源管理的数据字典、小区管理与房源管理，权限管理与房源管理属于两不同的dubbo服务，当前我们就来把单体架构拆分为dubbo通信的分布式架构，拆分步骤：

1、shf-parent模块管理dubbo相关的依赖

2、common-util模块引入依赖

3、提取api接口模块：service-api

4、分解web-admin模块：

​ web-admin作为服务消费者，只负责dubbo消费端

​ service及dao层作为服务提供者，通过dubbo发布服务

二、服务拆分

1、shf-parent模块添加dubbo依赖管理

在shf-parent模块pom.xml新增依赖(第一天搭建环境的时候已经添加，不用重复添加)

1. 版本锁定

   <dubbo.version>2.6.0dubbo.version>
   <zookeeper.version>3.4.7zookeeper.version>
   <junit.version>4.12junit.version>
   <zkclient.version>0.1zkclient.version>
   

2. 管理依赖

   
   <dependency>
       <groupId>com.alibabagroupId>
       <artifactId>dubboartifactId>
       <version>${dubbo.version}version>
   dependency>
   <dependency>
       <groupId>org.apache.zookeepergroupId>
       <artifactId>zookeeperartifactId>
       <version>${zookeeper.version}version>
   dependency>
   <dependency>
       <groupId>com.github.sgroschupfgroupId>
       <artifactId>zkclientartifactId>
       <version>${zkclient.version}version>
   dependency>
   <dependency>
       <groupId>javassistgroupId>
       <artifactId>javassistartifactId>
       <version>3.12.1.GAversion>
   dependency>
   <dependency>
       <groupId>commons-codecgroupId>
       <artifactId>commons-codecartifactId>
       <version>1.10version>
   dependency>
   

2、common-util模块引入依赖

在common-util模块pom.xml引入依赖(第一天搭建环境的时候已经添加，不用重复添加)

<dependency>
 <groupId>com.alibabagroupId>
 <artifactId>dubboartifactId>
dependency>
<dependency>
 <groupId>org.apache.zookeepergroupId>
 <artifactId>zookeeperartifactId>
dependency>
<dependency>
 <groupId>com.github.sgroschupfgroupId>
 <artifactId>zkclientartifactId>
dependency>
<dependency>
 <groupId>javassistgroupId>
 <artifactId>javassistartifactId>
dependency>
<dependency>
 <groupId>commons-codecgroupId>
 <artifactId>commons-codecartifactId>
dependency>

3、搭建service-api模块

用于存放所有业务层接口

3.1 创建工程

在shf-parent工程中创建子工程service-api

3.2 引入依赖

<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/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>shf-parentartifactId>
        <groupId>com.atguigugroupId>
        <version>1.0version>
    parent>
    <modelVersion>4.0.0modelVersion>
    <artifactId>service-apiartifactId>
    <packaging>jarpackaging>

    <dependencies>
        <dependency>
            <groupId>com.atguigugroupId>
            <artifactId>common-utilartifactId>
            <version>1.0version>
        dependency>
        <dependency>
            <groupId>com.atguigugroupId>
            <artifactId>modelartifactId>
            <version>1.0version>
        dependency>
    dependencies>
project>

3.3 复制service接口

复制AdminService与RoleService到service-api模块的com.atguigu.service包中

4、搭建服务提供者模块

4.1 搭建service父工程

1. 在shf-parent工程中搭建子工程命名为service，这个工程作为所有服务提供者的父工程

2. 删除service工程的src目录

3. 修改service工程的pom.xml文件

   
   <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">
       <parent>
           <artifactId>shf-parentartifactId>
           <groupId>com.atguigugroupId>
           <version>1.0version>
       parent>
       <modelVersion>4.0.0modelVersion>
   
       <artifactId>serviceartifactId>
       <packaging>pompackaging>
   
       <dependencies>
           <dependency>
               <groupId>com.atguigugroupId>
               <artifactId>service-apiartifactId>
               <version>1.0version>
           dependency>
       dependencies>
   project>
   

4.2 搭建service-acl工程

4.2.1 创建工程

在service工程中创建子工程service-acl子工程，并且使用插件将其转成javaweb项目

4.2.2 修改pom.xml

<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">
    <parent>
        <artifactId>serviceartifactId>
        <groupId>com.atguigugroupId>
        <version>1.0version>
    parent>
    <modelVersion>4.0.0modelVersion>

    <artifactId>service-aclartifactId>
    <packaging>warpackaging>

    <build>
        <plugins>
            <plugin>
                <groupId>org.eclipse.jettygroupId>
                <artifactId>jetty-maven-pluginartifactId>
                <version>9.4.15.v20190215version>
                <configuration>
                    
                    <scanIntervalSeconds>2scanIntervalSeconds>
                    <webAppConfig>
                        
                        <contextPath>/contextPath>
                    webAppConfig>
                    <httpConnector>
                        
                        <port>7001port>
                    httpConnector>
                configuration>
            plugin>
        plugins>
    build>
project>

4.2.3 拷贝代码

拷贝web-admin工程中的业务层和持久层内容

1. 创建相同的业务层和持久层包结构

2. 拷贝AdminServiceImpl和RoleServiceImpl实现类到com.atguigu.service.impl包

3. 替换业务层实现类上的@Service注解为Dubbo的Service注解

   @Service(interfaceClass = AdminService.class)
   @Transactional(propagation = Propagation.REQUIRED)
   public class AdminServiceImpl extends BaseServiceImpl<Admin> implements AdminService {
   

   @Service(interfaceClass = RoleService.class)
   @Transactional(propagation = Propagation.REQUIRED)
   public class RoleServiceImpl extends BaseServiceImpl<Role> implements RoleService{
   

4. 拷贝持久层接口AdminMapper和RoleMapper到com.atguigu.mapper包中

5. 拷贝mappers目录到resources目录中

6. 拷贝日志配置文件和jdbc.properties文件到resources目录中

7. 拷贝spring-persist.xml和spring-service.xml到resources/spring目录中

8. 修改spring-service.xml配置文件

   ① 删除包扫描配置，因为包扫描应该有dubbo完成，进行服务发布

   ② 修改事务注解驱动配置

   
   <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
   

9. 添加发布dubbo服务的配置文件:spring/spring-registry.xml

   
   <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
          xsi:schemaLocation="http://www.springframework.org/schema/beans
                              http://www.springframework.org/schema/beans/spring-beans.xsd
                              http://code.alibabatech.com/schema/dubbo
                              http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
       
       <dubbo:application name="service-acl"/>
       
       <dubbo:protocol name="dubbo" port="20881"/>
       
       <dubbo:registry address="zookeeper://localhost:2181" />
       
       <dubbo:annotation package="com.atguigu"/>
   beans>
   

10. 修改web.xml文件

    
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns="http://java.sun.com/xml/ns/javaee"
             xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
             version="2.5">
        
        <context-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:spring/spring-*.xmlparam-value>
        context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
        listener>
    web-app>
    

    注意: spring-service.xml文件中可以不使用import标签导入spring-persist.xml了

5、搭建服务消费者模块

5.1 搭建web父工程

1. 在shf-parent工程中搭建子工程命名为web，这个工程作为所有服务消费者的父工程

2. 删除web工程的src目录

3. 修改web工程的pom.xml文件

   
   <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">
       <parent>
           <artifactId>shf-parentartifactId>
           <groupId>com.atguigugroupId>
           <version>1.0version>
       parent>
       <modelVersion>4.0.0modelVersion>
       <artifactId>webartifactId>
       <packaging>pompackaging>
       <dependencies>
           <dependency>
               <groupId>com.atguigugroupId>
               <artifactId>service-apiartifactId>
               <version>1.0version>
           dependency>
       dependencies>
   project>
   

5.2 搭建web-admin工程

5.2.1 移动模块

① 将web-admin移动到web模块中

② 删除shf-parent模块pom.xml文件的web-admin标签，该模块已移动到web模块

③ 在web模块的pom.xml中新增

<modules>
    <module>web-adminmodule>
modules>

5.2.2 修改web-admin工程的pom.xml

修改了父模块为web，删除了依赖（父模块已引入依赖）

<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/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>webartifactId>
        <groupId>com.atguigugroupId>
        <version>1.0version>
    parent>
    <modelVersion>4.0.0modelVersion>
    <artifactId>web-adminartifactId>
    <packaging>warpackaging>
    <build>
        <plugins>
            <plugin>
                <groupId>org.eclipse.jettygroupId>
                <artifactId>jetty-maven-pluginartifactId>
                <version>9.4.15.v20190215version>
                <configuration>
                    <scanIntervalSeconds>2scanIntervalSeconds>
                    <webAppConfig>
                        
                        <contextPath>/contextPath>
                    webAppConfig>
                    <httpConnector>
                        
                        <port>8000port>
                    httpConnector>
                configuration>
            plugin>
        plugins>
    build>
project>

5.2.3 删除service与dao层

① 删除com.atguigu.service包和com.atguigu.mapper包

② 删除resources/mappers目录

③ 删除resources/spring/spring-service.xml和resources/spring/spring-persist.xml文件

5.2.4 新增dubbo配置文件

创建resources/spring/spring-registry.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://code.alibabatech.com/schema/dubbo
                           http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
    <dubbo:application name="web-admin"/>
    
    <dubbo:registry address="zookeeper://localhost:2181"/>
    
    <dubbo:annotation package="com.atguigu"/>
    
    <dubbo:consumer check="false" timeout="600000">dubbo:consumer>
beans>

5.2.5 修改web.xml

删除ContextLoadListener和comtext-param配置，并且将加载的配置文件路径改成classpath:spring/spring-*.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5">
    
    <servlet>
        <servlet-name>dispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:spring/spring-*.xmlparam-value>
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>
    
    
    <filter>
        <filter-name>CharacterEncodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF-8param-value>
        init-param>
        
        <init-param>
            <param-name>forceRequestEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
        
        <init-param>
            <param-name>forceResponseEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>
web-app>

5.2.6 改造表现层

将表现层注入服务对象的@Autowired注解改成@Reference注解

@Reference
private AdminService adminService;

@Reference
private RoleService roleService;

6、测试

① 在shf-parent项目中执行install

② 启动zookeeper

③ 使用jetty插件启动service-acl与web-admin模块

④ 访问：http://localhost:8000/