通过dubbo对ssh进行整合

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于 2021-12-15 23:08:40 发布

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分类专栏： maven dubbo ssh 文章标签： ssh maven java

本文链接：https://blog.youkuaiyun.com/yinweicheng/article/details/80973151

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maven 同时被 3 个专栏收录

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最近学完了maven和dubbo，在将之前的项目进行整合拆分成maven+dubbo的时候，遇到了很多麻烦，在这里将步骤粗略的写一下。以方便其他人或者日后在遇到此类问题。由与篇幅较长，本片先写maven拆分子项目。

项目demo：许木木/bookstore

整合后的项目（maven拆分+dubbo）：许木木/bookshop-maven

maven拆分

1.创建maven父项目

父工程只有pom.xml，可以推断父工程不进行编码

作用

项目需要的以来信息，在父工程中定义，子模块继承父工程

将各个子模块聚合到一起

2. 导入依赖：

3. 将其发布到maven仓库中：

发布到本地仓库的目的

将来service、dao工程发布到本地仓库时会通过父工程进行相互调用

2.创建子模块

1. 在父工程基础上创建po子模块

将po层复制到项目中,maveninstall，更换jdk版本后要通过maven build ...输入安装jar包

2. 创建dao子模块

拆分spring配置文件

basic.xml：

2.dao.xml

将dao层复制到项目中

引入po依赖, maveninstall：

3.创建service子模块，同样的方法引入, maven install

4.创建action子模块

拆分spring配置文件。

修改web.xml，修改spring配置文件的加载路径

拆分时需要注意的是者当中的配置文件路径问题，见

maven拆分ssh项目之文件通配符

这样就将原项目拆分成一个具有po、dao、service、action模块的maven项目，各模块之间的关系为：

dubbo分布式服务的整合

将拆分后的项目应用dubbo，以便于进行服务的治理，降低项目之间的耦合度,优点不必多说。此时各模块之间的关系如下：

在父pom.xml中引入dubbo与zookeeper：

<dependency>
				<groupId>com.alibaba</groupId>
				<artifactId>dubbo</artifactId>
				<version>2.5.3</version>
				<exclusions>
					<exclusion>
						<groupId>org.springframework</groupId>
						<artifactId>spring</artifactId>
					</exclusion>
				</exclusions>
			</dependency>
			<dependency>
				<groupId>com.github.sgroschupf</groupId>
				<artifactId>zkclient</artifactId>
				<version>0.1</version>
			</dependency>

1.创建接口模块

将service模块作为服务提供者，action做为服务消费者，这样action层和serviceimpl都需要service接口，因此单独建立interface模块，文件结构如下：

2.服务提供方

service此时作为服务提供者，则根据rpc底层实现原理，进行远程调用的项目必须暴露端口（便于通过网络编程的流操作通过动态代理实现远程调用），因此将service模块打包方式改为war。则服务提供方的相关配置：

dubbo-provider.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 ">   
    <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
    <dubbo:application name="bootshop-service"/>
    <dubbo:provider delay="-1" timeout="60000" retries="0"/>
    <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <dubbo:registry protocol="zookeeper" address="zookeeper://127.0.0.1:2181"/>
    <dubbo:protocol id="book" name="dubbo" port="20880"/>
    <dubbo:protocol id="authority" name="dubbo" port="20881"/>
    <dubbo:protocol id="business" name="dubbo" port="20882"/>
    <dubbo:protocol id="comment" name="dubbo" port="20883"/>
    <dubbo:protocol id="login" name="dubbo" port="20884"/>
    <dubbo:protocol id="order" name="dubbo" port="20885"/>
    <dubbo:protocol id="shop" name="dubbo" port="20886"/>
    <dubbo:protocol id="sort" name="dubbo" port="20887"/>
    <dubbo:protocol id="userComment" name="dubbo" port="20888"/>
    <dubbo:protocol id="user" name="dubbo" port="20889"/>
    <dubbo:protocol id="manager" name="dubbo" port="20890"/>
    <!-- 生成远程服务代理，对不同的服务通过不同的端口号进行暴露 -->
    <dubbo:service interface="edu.hrbeu.service.BookService" ref="bookService" protocol="book"/>
    <dubbo:service interface="edu.hrbeu.service.AuthorityService" ref="authorityService" protocol="authority"/>
    <dubbo:service interface="edu.hrbeu.service.BusinessService" ref="businessService" protocol="business"/>
    <dubbo:service interface="edu.hrbeu.service.CommentService" ref="commentService" protocol="comment"/>
    <dubbo:service interface="edu.hrbeu.service.LoginService" ref="loginService" protocol="login"/>
    <dubbo:service interface="edu.hrbeu.service.OrderService" ref="orderService" protocol="order"/>
    <dubbo:service interface="edu.hrbeu.service.ShopService" ref="shopService" protocol="shop"/>
    <dubbo:service interface="edu.hrbeu.service.SortService" ref="sortService" protocol="sort"/>
    <dubbo:service interface="edu.hrbeu.service.UserCommentService" ref="userCommentService" protocol="userComment"/>
    <dubbo:service interface="edu.hrbeu.service.UserService" ref="userService" protocol="user"/>
    <dubbo:service interface="edu.hrbeu.service.ManagerService" ref="managerService" protocol="manager"/>
</beans>

以上配置中，我刚开始比较迷糊的时协议的配置，单个服务我会，但是多个协议配置时，总是报出：”Failed to check the status of the service . No provider available for the service“异常。着实让人摸不着头脑。最后通过对协议声明id，让后让不同的service占据不同的端口成功解决！！

bean-service.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 配置组件扫描器 -->
	<context:component-scan base-package="edu.hrbeu" />
	<!-- AOP动态代理 -->
	<aop:aspectj-autoproxy proxy-target-class="true" />
	<import resource="dubbo-provider.xml"/>
</beans>

相应的web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<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_3_0.xsd"
	id="WebApp_ID" version="3.0">

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:spring/beans-*.xml</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
</web-app>

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">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>edu.hrbeu</groupId>
		<artifactId>bookshop</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>bookshop-service</artifactId>
	<packaging>war</packaging>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-interface</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-po</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-dao</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				<configuration>
					<port>8060</port>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project><port>8060</port>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

3.服务消费方

action此时作为服务消费者，则其相关配置如下：

dubbo-consumer.xml:

<?xml version="1.0" encoding="UTF-8"?>
<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 ">   
    <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
    <dubbo:application name="bootshop-action"/>
    <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <dubbo:registry protocol="zookeeper" address="zookeeper://127.0.0.1:2181"/>
    <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
    <dubbo:reference interface="edu.hrbeu.service.BookService" id="bookService" />
    <dubbo:reference interface="edu.hrbeu.service.AuthorityService" id="authorityService"/>
    <dubbo:reference interface="edu.hrbeu.service.BusinessService" id="businessService" />
    <dubbo:reference interface="edu.hrbeu.service.CommentService" id="commentService"/>
    <dubbo:reference interface="edu.hrbeu.service.LoginService" id="loginService" />
    <dubbo:reference interface="edu.hrbeu.service.OrderService" id="orderService" />
    <dubbo:reference interface="edu.hrbeu.service.ShopService" id="shopService"/>
    <dubbo:reference interface="edu.hrbeu.service.SortService" id="sortService"/>
    <dubbo:reference interface="edu.hrbeu.service.UserCommentService" id="userCommentService"/>
    <dubbo:reference interface="edu.hrbeu.service.UserService" id="userService"/>
    <dubbo:reference interface="edu.hrbeu.service.ManagerService" id="managerService"/>
</beans>

beans-mvc.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!-- 配置组件扫描器 -->
    <context:component-scan base-package="edu.hrbeu"/>
    ... ...
    <import resource="dubbo-consumer.xml"/>
</beans>

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">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>edu.hrbeu</groupId>
		<artifactId>bookshop</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>bookshop-action</artifactId>
	<packaging>war</packaging>
	<properties>
		<webVersion>3.1</webVersion>
	</properties>
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				<configuration>
					<port>8070</port>
				</configuration>
			</plugin>
		</plugins>
	</build>

	<dependencies>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-po</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-interface</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		
	</dependencies>
</project><port>8070</port>
				</configuration>
			</plugin>
		</plugins>
	</build>

	<dependencies>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-po</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>edu.hrbeu</groupId>
			<artifactId>bookshop-interface</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		
	</dependencies>
</project>

分别启动service模块与action模块，可以看到项目运行！!