这里接着前文,记录服务的生产和消费。
一、生产者
新建maven项目(笔者使用的是idea),添加依赖如下:
<dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.0</version> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>0.10</version> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>4.0.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.46</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.25</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.0.35.Final</version> </dependency> </dependencies>
编写测试接口和实现:
package com.gcc.service; /** * 发布接口 * @author gcc */ public interface DemoProviderService { public String sayHello(String name); }
package com.gcc.service.impl; import com.gcc.service.DemoProviderService; /** * 接口实现 * @author gcc */ public class DemoProviderServiceImpl implements DemoProviderService{ public String sayHello(String name) { return "this is server 001"; } }
添加dubbo配置文件:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用名称,用于计算依赖关系 --> <dubbo:application name="demo-provider" /> <!-- 使用zookeeper注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181"/> <!-- 使用dubbo协议,在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880"/> <!-- service实现类作为本地的一个bean --> <bean id="demoProviderService" class="com.gcc.service.impl.DemoProviderServiceImpl"/> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.gcc.service.DemoProviderService" ref="demoProviderService"/> </beans>
最后做发布(生产)的测试:
package com.gcc.test; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.io.IOException; public class ProviderTest { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"dubbo-demo-provider.xml"}); context.start(); System.out.println("服务提供者向zookeeper注册中心注册服务成功(端口:20880)"); try { System.in.read(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } // press any key to exit context.close(); } }
显示如下表示发布成功:
二、消费者
新建maven项目,添加依赖如下:
<dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.0</version> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>0.10</version> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>4.0.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.46</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.25</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.0.35.Final</version> </dependency> </dependencies>
添加接口如下:
package com.gcc.service; /** * 需要使用的接口 * @author gcc */ public interface DemoProviderService { public String sayHello(String name); }
添加dubbo配置如下:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 消费方应用名称,用于计算依赖关系,不是匹配条件,不要与提供方名称一样 --> <dubbo:application name="demo-consumer"/> <!-- 使用zookeeper注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181"/> <!-- 生成远程服务代理,可以与本地bean一样使用 check属性,启动时候是否检查 一般设置成false 启动时候不检查 --> <dubbo:reference id="demoProviderService" check="false" interface="com.gcc.service.DemoProviderService"/> </beans>
测试如下:
package com.gcc.test; import java.io.IOException; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.gcc.service.DemoProviderService; public class ConsumerTest { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"dubbo-demo-consumer.xml"}); context.start(); DemoProviderService demoProviderService=(DemoProviderService) context.getBean("demoProviderService"); String result=demoProviderService.sayHello("你好"); System.out.println("远程调用结果:"+result); try { System.in.read();//一直连接 } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } context.close(); } }
测试输入如下:
这样就将service分离了出来,只暴露接口(实现由生产者封装完成),使用者只要面向接口去编程即可。
三、管理界面:
对生产者(服务提供者)和消费者的管理,阿里也提供了用户界面,启动如下:
1,下载dubbo发布包,地址:https://github.com/apache/incubator-dubbo/tree/dubbo-2.6.0
2,寻找路径dubbo-dubbo-2.6.0\下的dubbo-admin项目,将他打成war包(此步骤可能较麻烦)
3,war包放置到tomcat/webapp下运行
或者
1,使用笔者的war包,路径:https://github.com/mengguagua/dubbo
2,新下载一个tomcat,删除webapps\ROOT下所有文件,解压war包到ROOT目录
3,启动tomcat
4,在浏览器输入localhost:8080即可,默认用户名和密码都是root
注:启动tomcat之前,先把 zookeeper启动了,否则启动tomcat加载dubbo-admin会报错,因为默认就检查zookeeper服务,检测不到 就一直报错;
界面如下: