标签：ret method 常见 管理 snapshot mic curator 远程服务 out
1、首先，新建3个普通maven商城项目，模拟以往常见的Java单体应用开发，mall-interface是存放接口和公共代码部分，order-service-consumer和user-service-provider的pom依赖于mall-interface。
2、在order-service-consumer和user-service-provider中分别实现接口，编写各自的实现类
以往，如果order-service-consumer和user-service-provider有相互调用，一般需要当作一个模块引用，部署到服务器的时候需要部署全部模块，分布部署多个服务器的话就很麻烦，并且大的项目模块多的放在一起不方便开发和管理。
那么，把项目中各个模块分开部署那不就好了？但是如果直接把order-service-consumer 和user-service-provider分开部署不同服务器上，显然他们不能相互调用业务接口。这时Dubbo作为RPC框架，它的用处显现出来了。简单的说，Dubbo可以远程调用部署在不同服务器上的业务接口。
通过Dubbo改造，即使order-service-consumer 和user-service-provider部署不同机器，两个模块可以像调用本地接口一样调用远程服务。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.xg.xmall.dubbo</groupId> <artifactId>user-service-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>com.xg.xmall</groupId> <artifactId>mall-interface</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!-- 引入dubbo --> <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.5</version> </dependency> <!-- 注册中心使用的是zookeeper，引入操作zookeeper的客户端端 --> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>2.12.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
<?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://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 1、指定当前服务/应用的名字（同样的服务名字相同，不要和别的服务同名） --> <dubbo:application name="user-service-provider"></dubbo:application> <!-- 2、指定注册中心的位置 --> <!-- <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry> --> <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"></dubbo:registry> <!-- 3、指定通信规则（通信协议？通信端口） --> <dubbo:protocol name="dubbo" port="20882"></dubbo:protocol> <!-- 4、暴露服务 ref：指向服务的真正的实现对象 --> <dubbo:service interface="com.xg.xmall.dubbo.service.UserService" ref="userServiceImpl" timeout="1000" version="1.0.0"> <dubbo:method name="getUserAddressList" timeout="1000"></dubbo:method> </dubbo:service> <!-- 服务的实现 --> <bean id="userServiceImpl" class="com.xg.xmall.dubbo.service.impl.UserServiceImpl"></bean> </beans>
发布服务之前需要启动 Zookeeper
从Dubbo 服务监控中可以看见服务发布成功
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.xg.xmall.dubbo</groupId> <artifactId>user-service-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>com.xg.xmall</groupId> <artifactId>mall-interface</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!-- 引入dubbo --> <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.5</version> </dependency> <!-- 注册中心使用的是zookeeper，引入操作zookeeper的客户端端 --> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>2.12.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
<?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://dubbo.apache.org/schema/dubbo" xmlns:context="http://www.springframework.org/schema/context" 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-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 扫描组件 --> <context:component-scan base-package="com.xg.xmall.dubbo.service.impl"></context:component-scan> <dubbo:application name="order-service-consumer"></dubbo:application> <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry> <!--声明需要调用的远程服务的接口,生成远程服务代理 --> <dubbo:reference interface="com.xg.xmall.dubbo.service.UserService" id="userService" timeout="5000" retries="3" version="*"> </dubbo:reference> <dubbo:monitor protocol="registry"></dubbo:monitor> </beans>
order-service-consumer并没有存放用户信息实现类，只是注入服务的接口，就可以获取其他项目提供的用户信息。可见，通过Dubbo调用远程服务成功
标签：ret method 常见 管理 snapshot mic curator 远程服务 out
原文地址：https://www.cnblogs.com/tocode/p/10451512.html
