简单实现dubbo

最新推荐文章于 2022-12-22 13:45:53 发布

原创最新推荐文章于 2022-12-22 13:45:53 发布 · 244 阅读

CC 4.0 BY-SA版权

本文介绍了一个基于Dubbo实现的微服务案例，包括API接口定义、服务提供者及消费者的具体实现，通过Zookeeper进行服务注册与发现。

创建三个项目：
song-api：项目只是一个简单的jar项目，主要负责提供接口，让song-consumer和song-drovider两个项目实现和调用；
song-consumer:项目为api项目的实现类，负责提供服务，consumer依赖api
song-drovider:项目为消费者，调用api提供的接口，消费消息，drovider依赖api；
首先我们先看dubbo-api项目；
首先提供接口：

  public interface UserService {
        String getFindUser(String name);
    }

dubbo.xml配置文件：

 <?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">
       <!-- 将接口注入的dubbo 生成远程代理服务 -
       <dubbo:reference interface="com.song.api.UserService" id="userService" cluster="failfast" check="false" />
</beans>

pom.xml文件中的依赖：
1、dubbo(alibaba)
2、spring-beans

 <dependencies>
            <dependency>
                        <groupId>com.alibaba</groupId>
                        <artifactId>dubbo</artifactId>
                        <version>2.5.3</version>
            </dependency>
            <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-beans</artifactId>
                        <version>4.2.5.RELEASE</version>
            </dependency>
  </dependencies>

项目整体结构：
在这里插入图片描述

将项目打包
再看看 song-drovider：
UserServiceImpl实现类：

 public class UserServiceImpl implements UserService {
        public String getFindUser(String name) {
                    return "hello haha"+name;
        }

}
创建dubbo启动方法：

public static void main(String[] args) {
        com.alibaba.dubbo.container.Main.main(args);
        }

dubbo-drovider.xml 配置文件

<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="song-provider"/>
       <dubbo:registry address="zookeeper://127.0.0.1:2181" />
       <bean class="com.song.provider.UserServiceImpl" id="userService" />
       <dubbo:provider cluster="failfast"/>
       <dubbo:service interface="com.song.api.UserService" ref="userService" />
</beans>

创建dubbo.properties配置文件;

 dubbo.container=spring
#set dubbo Sping load setting xmls
dubbo.spring.config=classpath:dubbo-provider.xml
dubbo.protocol.name=dubbo
dubbo.protocol.port=28512
pom.xml添加项目依赖：
    <dependencies>
        <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>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
      
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>com.itheima</groupId>
            <artifactId>song-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

项目整体结构：
在这里插入图片描述

将项目打包；
最后看song-consumer：
UserCollection方法类：

        @RestController
    public class UserCollection {
                @Autowired
                private UserService service;
                
                @RequestMapping("/user")
                @ResponseBody
                public String song(String name) {
                            return service.getFindUser(name);
                }
    }

song-consumer.xml配置文件：

 <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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbohttp://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <dubbo:application name="song-consumer"/>
    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
    <import resource="classpath*:dubbo.xml"/>
</beans>

psring-config.xml配置文件

 <?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"
           xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"
           default-autowire="byName">
           <context:annotation-config/>
           <import resource="classpath:song-consumer.xml"/>
    </beans>

spring-mvc.xml配置文件

 <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"
           xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd">
                <context:component-scan base-package="com.song.consumer"/>
    </beans>

web.xml：

 <?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/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
             id="WebApp_ID" version="3.0">
        <!-- 配置Spring配置文件路径 -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath*:spring-config.xml
            </param-value>
        </context-param>
    <!-- 配置Spring上下文监听器 -->
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcher</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>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

pom.xml需要使用的项目依赖

<dependencies>
        <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>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>com.babytree</groupId>
            <artifactId>test_api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.itheima</groupId>
            <artifactId>song-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>dubbo-consumer</finalName>
                        <pluginManagement>
                                    <plugins>
                                                <!-- 配置Tomcat插件 -->
                                                <plugin>
                                                            <groupId>org.apache.tomcat.maven</groupId>
                                                            <artifactId>tomcat7-maven-plugin</artifactId>
                                                            <configuration>
                                                                        <port>8082</port>
                                                                        <path>/</path>
                                                            </configuration>
                                                </plugin>
                                    </plugins>
                        </pluginManagement>
            </build>

项目整体结构：
在这里插入图片描述
启动dubbo的main方法，将dubbo启动；
将song-consumer项目打成war包在tomcat上运行

这样我们就调用成功了！