RPC框架Dubbo学习 --- Dubbo架构与实战（实战——注解方式）

文章内容输出来源：拉勾教育Java高薪训练营。
本篇文章是 Dubbo学习课程中的一部分笔记。

本示例采用注解方式实现，其他实现如spring xml方式或者api方式可参考dubbo官网示例：http://dubbo.apache.org/zh-cn/docs/user/quick-start.html

1，创建工程：dubbo-demo-base

                            

父工程下配置好版本信息：

<?xml version="1.0" encoding="UTF-8"?>
<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.ming</groupId>
    <artifactId>dubbo-demo-base</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>service-api</module>
        <module>service-provider</module>
        <module>service-consumer</module>
    </modules>


    <properties>
        <dubbo.version>2.7.5</dubbo.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-common</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-zookeeper</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-nacos</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-rpc-dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-remoting-netty4</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-serialization-hessian2</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- 日志配置 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.5</version>
        </dependency>

        <!-- json数据化转换 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>
    </dependencies>



    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2，创建module：service-api用于规范双方接口约定

                 

3，创建服务提供方 service-provider（pom文件中引入service-api）

 

1，引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>dubbo-demo-base</artifactId>
        <groupId>com.ming</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>service-provider</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.ming</groupId>
            <artifactId>service-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-remoting-netty4</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-serialization-hessian2</artifactId>
        </dependency>
    </dependencies>


</project>

2,创建service实现类HelloServiceImpl：

import com.ming.service.HelloService;
import org.apache.dubbo.config.annotation.Service;

@Service
public class HelloServiceImpl implements HelloService {
    @Override
    public String sayHello(String name) {
        return "hello：" + name;
    }
}

3，创建启动类DubboPureMain : 

import org.apache.dubbo.config.RegistryConfig;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.IOException;


public class DubboPureMain {
    public static void main(String[] args) throws IOException {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProviderConfiguration.class);
        context.start();
        System.in.read();

    }

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

4,添加配置文件 dubbo-provider.properties：

dubbo.application.name=service-provider
dubbo.protocol.name=dubbo
dubbo.protocol.port=20881

5，启动zookeeper，启动启动类。

4，创建客户端module：service-consumer

1，引入jar包，和服务提供方一样

2，编写comsumerComponet:

import com.ming.service.HelloService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Component;

@Component
public class ComsumerComponet {

    @Reference
    private HelloService helloService;

    public String sayHello(String name){
        return helloService.sayHello(name);
    }
}

3, 编写启动类：

package com.ming;

import com.ming.bean.ComsumerComponet;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.IOException;
import java.util.function.Consumer;

public class AnnotationConsumerMain {


    public static void main(String[] args) throws IOException {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConsumerConfigutation.class);
        context.start();
        ComsumerComponet comsumerComponet = context.getBean(ComsumerComponet.class);
        while (true){
            System.in.read();
            String heel = comsumerComponet.sayHello("IU");
            System.out.println("result: " + heel);
        }
    }

    @Configuration
    @PropertySource("classpath:/dubbo-consumer.properties")
    @ComponentScan(basePackages = "com.ming.bean")
    @EnableDubbo
    static class ConsumerConfigutation{

    }
}

4，编写配置文件：

dubbo.application.name=service-consumer
dubbo.registry.address=zookeeper://127.0.0.1:2181

5, 启动客户端启动类。

 

5，查看效果