dubbo简单入门案例(回顾)

项目目录结构

maven所依赖的jar

<dependencies>
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>
        <!-- 这个包是对外服务的接口jar 消费者和服务者都需要依赖于它 -->
        <dependency>
            <groupId>org.dubbo.api</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.3.10.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>netty</artifactId>
                    <groupId>org.jboss.netty</groupId>
                </exclusion>
            </exclusions>
        </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>
    </dependencies>

api对外服务接口

public interface HelloService {

    String hello(String name);
}

服务端配置及代码

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">
    <!--定义了提供方应用信息，用于计算依赖关系；在 dubbo-admin 或 dubbo-monitor 会显示这个名字，方便辨识-->
    <dubbo:application name="demotest-provider" owner="programmer" organization="dubbox"/>
    <!--使用 zookeeper 注册中心暴露服务，注意要先开启 zookeeper  记住不是在单机试玩的时候不能填写 127.0.0.1-->
    <dubbo:registry address="zookeeper://192.168.10.151:2181"/>
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />
    <!--使用 dubbo 协议实现定义好的 api.PermissionService 接口-->
    <dubbo:service interface="org.dubbo.api.HelloService" ref="helloServiceImpl" protocol="dubbo" />
    <!--具体实现该接口的 bean-->
    <bean id="helloServiceImpl" class="org.dubbo.provider.HelloServiceImpl"/>
</beans>

HelloServiceImpl.java

public class HelloServiceImpl implements HelloService{

    @Override
    public String hello(String name) {
        // TODO Auto-generated method stub
        return "hell消费者："+name;
    }

}

Provider.java 启动

public class Provider {
     public static void main(String[] args) throws IOException {
         ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("provider.xml");
         System.out.println(context.getDisplayName() + ": here");
         context.start();
         System.out.println("服务已经启动...");
         System.in.read();
     }
}

消费者

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">
    <dubbo:application name="demotest-consumer" owner="programmer" organization="dubbox"/>
    <!--向 zookeeper 订阅 provider 的地址，由 zookeeper 定时推送-->
    <dubbo:registry address="zookeeper://localhost:2181"/>
    <!--使用 dubbo 协议调用定义好的 api.helloService接口-->
    <dubbo:reference id="helloService" interface="org.dubbo.api.HelloService"/>
</beans>

StudentConsumer.java启动类

public class StudentConsumer {
    public static void main(String[] args) {
        //测试常规服务
        ClassPathXmlApplicationContext context =
                new ClassPathXmlApplicationContext("consumer.xml");
        context.start();
        System.out.println("consumer start");
        HelloService helloService = context.getBean(HelloService.class);
        System.out.println(helloService.hello("学生"));
    }
}

使用多台机子分布时候，切记虚拟网卡一定要禁用还有防火墙也必须关闭