手动搭建简易Dubbo+spring boot分布式框架

随着流量的增大，常规的垂直框架已经逐渐无法应付，分布式框架应运而生，Dubbo是其中极有代表性的一个，今天我们来尝试手动搭建一个dubbo框架

本次搭建完成得框架开源仓库地址：https://github.com/lmz2559/dubbo_mini

Dubbo

从官网拿一张图来说明dubbo的架构，provider提供服务，在启动的时候向注册中心（中介）说明自己提供什么服务，consumer消费服务，启动的时候，向注册中心询问自己想要的服务。

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搭建

我的搭建思路是有common为service提供依赖，service为provider与consumer提供依赖

搭建开始：

1、下载zookeeper并启动（在此不详述）

2、新建一个maven项目，在maven项目下，创建四个module，分别是common、service、provider、consumer

3、引入依赖

common：

<?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.lanly</groupId>
	<artifactId>common</artifactId>
	<version>1.0-SNAPSHOT</version>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<properties>
		<java.version>1.8</java.version>
		<dubbo.version>2.7.3</dubbo.version>
	</properties>
	<dependencies>
		<!--commons -->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.6</version>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.5</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.54</version>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.18.12</version>
		</dependency>


		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>

		</dependency>

		<dependency>
			<groupId>org.apache.dubbo</groupId>
			<artifactId>dubbo-spring-boot-starter</artifactId>
			<version>${dubbo.version}</version>
			<exclusions>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>slf4j-log4j12</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<dependency>
			<groupId>org.apache.dubbo</groupId>
			<artifactId>dubbo</artifactId>
			<version>${dubbo.version}</version>
		</dependency>

		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
			<version>4.0.1</version>
		</dependency>

		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-recipes</artifactId>
			<version>2.8.0</version>
		</dependency>
	</dependencies>
</project>

service：将其依赖于common

<?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.heaboy</groupId>
	<artifactId>service</artifactId>
	<version>1.0-SNAPSHOT</version>
	<dependencies>
        <!--依赖于common-->
		<dependency>
			<groupId>com.heaboy</groupId>
			<artifactId>common</artifactId>
			<version>1.0-SNAPSHOT</version>
		</dependency>
	</dependencies>
</project>

provider：provider依赖于service

<modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.lanly</groupId>
    <artifactId>provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>provider</name>
    <description>Demo project for Spring Boot</description>


    <dependencies>
        <dependency>
            <groupId>com.lanly</groupId>
            <artifactId>service</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
  
      </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

consumer：consumer同样依赖于service

<?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.lanly</groupId>
	<artifactId>consumer</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>consumer</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<dependencies>
		<dependency>
			<groupId>com.lanly</groupId>
			<artifactId>service</artifactId>
			<version>1.0-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
	
</project>

4、为 provider与comsumer配置文档，与zookeeper建立连接

provider

#spring服务名
spring.application.name=lanly_provider
#dubbo服务名
dubbo.application.name=dubbo_provider
#注册中心配置
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181

dubbo.protocol.name=dubbo
#暴露服务地址
dubbo.protocol.port=20881
#扫描service实现类所在包
dubbo.scan.base-packages=com.lanly.provider.**.serviceImpl

consumer

#dubbo服务名
dubbo.application.name=dubbo_consumer
#注册中心配置
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181
#服务端口
server.port=8085

5、在service创建一个测试接口

package com.lanly.service.service;

public interface ITestService {
    void test();
}

6、在provider实现测试接口

注意这里使用的service注解是org.apache.dubbo包下的

package com.lanly.provider.serviceImpl;

import com.lanly.service.service.ITestService;
import org.apache.dubbo.config.annotation.Service;

@Service
public class TestServiceImpl implements ITestService {
    @Override
    public void test() {
        System.out.println("进入测试");
    }
}

7、在consumer写一个测试controller

注意这里使用的reference注解是org.apache.dubbo包下的

package com.lanly.consumer.controller;

import com.lanly.service.service.ITestService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("")
public class TestController {
    @Reference
    private ITestService testService;

    @ResponseBody
    @RequestMapping("/test")
    public void test(){
        testService.test();
    }
}

8、为consumer与provider分别编写一个启动类（此处省略）

启动项目，打开zookeeper的UI插件，发现consumer和provider都已经与zookeeper建立了联系

尝试访问controller，访问成功，provider的控制台打印出了我想要的

至此，本次实验完成。

希望这篇文章能够帮到大家，如果我的文章有问题，欢迎批评指正。如果我有哪里说的不够清楚，也欢迎留言，我们一起讨论学习

潇雪凌宇

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