dubbo高级应用:
1,dubbo直连方式
默认的连接服务提供端的端口是20880,用直连的的方式可以指定提供端的url和这个具体服务暴露的端口(一个合作企业一个端口)
用直连的方式可以绕过zk等注册中心
2,一个系统既可以配成提供端也可以配成消费端,配合直连方式指定消费哪个服务提供的那个接口
3,用配置的方式最后的原理还是通过dubbo的客户端,通过ip+端口获取服义务和暴露服务
@Slf4j
public class RealReference {
//用于将bean关系注入到当前的context中
@Autowired
private ApplicationContext applicationContext;
@Test
public void realReference() {
String url = "dubbo://localhost:21880/com.demo.service.DemoService";//更改不同的Dubbo服务暴露的ip地址&端口
ReferenceBean<DemoService> referenceBean = new ReferenceBean<DemoService>();
referenceBean.setApplicationContext(applicationContext);
referenceBean.setInterface(com.demo.service.DemoService.class);
referenceBean.setUrl(url);
try {
referenceBean.afterPropertiesSet();
DemoService demoService = referenceBean.get();
System.out.print(demoService.deal("Tester"));
} catch (Exception e) {
e.printStackTrace();
}
}
基于Dubbo的动态远程调用
问题:为解决实际业务,由我方提供接口定义,具体的实现交给第三方处理。然后由第三方将开发好的服务注册到他们自己的Dubbo服务上,由我方调用。问题就在于多个第三方开发具体实现,对于我方而言如果按照配置方式切入调用是无法满足这种需求。所以找寻了dubbo的根据URL远程调用服务的机制。以下是Demo
关于Zookeeper的安装&配置此次不详细介绍了。
服务调用方
定义服务接口:
- package com.demo.service;
- /**
- * Desc:
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-04.
- */
- public interface DemoService {
- public String deal(String someting);
- }
定义Consumer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">
- <!-- 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="dubbo_consumer" />
- </beans>
远程调用测试类:
- package com.demo.test;
- import com.alibaba.dubbo.config.spring.ReferenceBean;
- import com.demo.service.DemoService;
- import lombok.extern.slf4j.Slf4j;
- import org.junit.Test;
- import org.junit.runner.RunWith;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.context.ApplicationContext;
- import org.springframework.test.context.ContextConfiguration;
- import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
- /**
- * Desc:测试Dubbo实时映射bean
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-04.
- */
- @RunWith(SpringJUnit4ClassRunner.class)
- @ContextConfiguration(locations = {
- "classpath:/spring/root-context.xml"
- })
- @Slf4j
- public class RealReference {
- //用于将bean关系注入到当前的context中
- @Autowired
- private ApplicationContext applicationContext;
- @Test
- public void realReference() {
- String url = "dubbo://localhost:21880/com.demo.service.DemoService";//更改不同的Dubbo服务暴露的ip地址&端口
- ReferenceBean<DemoService> referenceBean = new ReferenceBean<DemoService>();
- referenceBean.setApplicationContext(applicationContext);
- referenceBean.setInterface(com.demo.service.DemoService.class);
- referenceBean.setUrl(url);
- try {
- referenceBean.afterPropertiesSet();
- DemoService demoService = referenceBean.get();
- System.out.print(demoService.deal("Tester"));
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
服务提供方实现接口:
实现1:
- package com.dubboT.service;
- import com.demo.service.DemoService;
- import lombok.extern.slf4j.Slf4j;
- import org.springframework.stereotype.Service;
- /**
- * Desc:Dubbo动态加载服务测试
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-04.
- */
- @Service
- @Slf4j
- public class DemoServiceImpl implements DemoService {
- @Override
- public String deal(String s) {
- return "My Name is " + s;
- }
- }
实现2:
- package com.dubboT.service;
- import com.demo.service.DemoService;
- /**
- * Desc:
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-05.
- */
- public class DemoServiceNImpl implements DemoService {
- @Override
- public String deal(String s) {
- return "This is DemoServiceNImpl " + s;
- }
- }
分别在不同的端口暴露Service的实现
- <?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
- ">
- <bean id="demoService" class="com.rabbit.service.DemoServiceImpl" />
- <!-- 提供方应用信息,用于计算依赖关系 -->
- <dubbo:application name="dubboProvider" />
- <!-- 使用zookeeper注册中心暴露服务地址 -->
- <dubbo:registry address="zookeeper://127.0.0.1:2181" />
- <!-- 用dubbo协议在20880端口暴露服务 -->
- <dubbo:protocol name="dubbo" port="20880" />
- <!-- 声明需要暴露的服务接口 -->
- <dubbo:service interface="com.elasticsearch.service.DemoService" ref="demoService" />
- </beans>
DemoServiceNImpl在21800端口暴露
- <?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
- ">
- <bean id="demoService" class="com.rabbit.service.DemoServiceNImpl" />
- <!-- 提供方应用信息,用于计算依赖关系 -->
- <dubbo:application name="dubboProvider" />
- <!-- 使用zookeeper注册中心暴露服务地址 -->
- <dubbo:registry address="zookeeper://127.0.0.1:2181" />
- <dubbo:protocol name="dubbo" port="21880" />
- <!-- 声明需要暴露的服务接口 -->
- <dubbo:service interface="com.elasticsearch.service.DemoService" ref="demoService" />
- </beans>
分别提供服务
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- /**
- * Desc:
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-04.
- */
- public class DubboProviderMain {
- public static void main(String[] args) throws Exception {
- ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"spring/rabbit-dubbo-provider.xml"});
- context.start();
- System.in.read();
- }
- }
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- /**
- * Desc:
- * Mail:[email protected]
- * author:Michael Zhao
- * Date:2015-03-04.
- */
- public class DubboProvider2Main {
- public static void main(String[] args) throws Exception {
- ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"spring/dubbo-provider.xml"});
- context.start();
- System.in.read();
- }
- }
启动服务后,运行RealReference实现根据URL调用远程服务
- SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
- SLF4J: Defaulting to no-operation (NOP) logger implementation
- SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
- log4j:WARN No appenders could be found for logger (com.alibaba.dubbo.common.logger.LoggerFactory).
- log4j:WARN Please initialize the log4j system properly.
- log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
- My Name is Tester
- Process finished with exit code 0