dubbo学习笔记一（服务注册）

缺乏、安全感 2021-12-21 08:51 248阅读 0赞

## 相关的资料 ##

*  [官方文档][Link 1]
 *  [官方博客][Link 2]

## 项目结构 ##

![1226359-20190508161118272-1253380504.png][]

## 项目说明 ##

*  \[lesson1-config-api\] 是一个接口工程，编译后是jar包，被其他工程依赖
 *  \[lesson1-config-2-properties-provider\] 是服务提供者

## 代码示例 ##

*  \[IEchoService\]

public interface IEchoService {
        void echo();
    }

*  \[EchoServiceImpl\]

@Service
    public class EchoServiceImpl implements IEchoService {
        public void echo() {
            System.out.printf("hello");
        }
    }

*  \[ProviderApp\]

@RestController
    @SpringBootApplication
    @EnableDubbo(scanBasePackages = "provider.service.impl")
    @PropertySource("classpath:/spring/dubbo-provider.properties")
    public class ProviderApp {
    
        @GetMapping("/hello")
        public String hello() {
            return "hello";
        }
    
        public static void main(String[] args) throws IOException {
            /**
             * 这种方式启动不能注册服务到zookeeper
             */
            //SpringApplication.run(ProviderApp.class, args);
    
            /**
             * 官方的demon采用这种方式
             */
            AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProviderApp.class);
            context.start();
            System.in.read();
    
        }
    
    }

或者

@RestController
    @SpringBootApplication
    public class ProviderApp {
    
        @GetMapping("/hello")
        public String hello() {
            return "hello";
        }
    
        public static void main(String[] args) throws IOException {
            AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProviderConfiguration.class);
            context.start();
            System.in.read();
    
        }
    
    
        @Configuration
        @EnableDubbo(scanBasePackages = "provider.service.impl")
        @PropertySource("classpath:/spring/dubbo-provider.properties")
        static class ProviderConfiguration {
        }
    
    }

*  \[dubbo-provider.properties\]

# dubbo-provider.properties
    dubbo.application.name=annotation-provider
    dubbo.protocol.name=dubbo
    dubbo.protocol.port=20880
    dubbo.registry.address=zookeeper://127.0.0.1:2181

> 如果配置文件不指定注册中心的话，可以在代码里指定

@Configuration
        @EnableDubbo(scanBasePackages = "provider.service.impl")
        @PropertySource("classpath:/spring/dubbo-provider.properties")
        static class ProviderConfiguration {
            @Bean
            public RegistryConfig registryConfig() {
                RegistryConfig registryConfig = new RegistryConfig();
                //registryConfig.setAddress("multicast://224.5.6.7:1234");
                registryConfig.setAddress("zookeeper://127.0.0.1:2181");
                return registryConfig;
            }
    
        }

*  \[pom.xml\]

<dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-web</artifactId>
                    <version>1.5.9.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.apache.dubbo</groupId>
                    <artifactId>dubbo-dependencies-zookeeper</artifactId>
                    <version>2.7.1</version>
                    <type>pom</type>
                </dependency>
                <dependency>
                    <groupId>org.apache.dubbo</groupId>
                    <artifactId>dubbo-config-spring</artifactId>
                    <version>2.7.1</version>
                </dependency>

>  dubbo-config-spring是必须的，如果没有是不会报错，但是服务注册不上

## zkCli 查看 ##

[zk: localhost:2181(CONNECTED) 259] ls /dubbo/com.xh.dubbo.learn.lesson1.api.IEchoService/providers
    Node does not exist: /dubbo/com.xh.dubbo.learn.lesson1.api.IEchoService/providers
    [zk: localhost:2181(CONNECTED) 260] ls /dubbo/com.xh.dubbo.learn.lesson1.api.IEchoService/providers
    [dubbo%3A%2F%2F127.0.1.1%3A20880%2Fcom.xh.dubbo.learn.lesson1.api.IEchoService%3Fanyhost%3Dtrue%26application%3Dannotation-provider%26bean.name%3Dproviders%3Adubbo%3Acom.xh.dubbo.learn.lesson1.api.IEchoService%26default.deprecated%3Dfalse%26default.dynamic%3Dfalse%26default.register%3Dtrue%26deprecated%3Dfalse%26dubbo%3D2.0.2%26dynamic%3Dfalse%26generic%3Dfalse%26interface%3Dcom.xh.dubbo.learn.lesson1.api.IEchoService%26methods%3Decho%26pid%3D3935%26register%3Dtrue%26release%3D2.7.1%26side%3Dprovider%26timestamp%3D1557307484341]

> 在控制台关闭服务后发现zk中的节点没有删除  
> delete path \# 删除叶子节点  
> rmr path \# 递归删除节点和他的子节点

转载于:https://www.cnblogs.com/lanqie/p/10832328.html

[Link 1]: http://dubbo.apache.org/zh-cn/docs/user/configuration/annotation.html
[Link 2]: http://dubbo.apache.org/zh-cn/blog/dubbo-annotation.html
[1226359-20190508161118272-1253380504.png]: /images/20211221/58f37cc7985042c2964f34c73f66f7b4.png