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Dubbo 学习笔记(三) Spring Boot 整合 Dubbo(官方版)
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<li><a target="_blank" rel="noopener" href="https://github.com/zdRan/learning">Dubbo 学习笔记 源码地址</a></li>
<li><a href="https://zdran.com/20181102.html">Dubbo 学习笔记(零) 自己实现一个 RPC 框架</a></li>
<li><a href="https://zdran.com/20181113.html">Dubbo 学习笔记(一) Hello,Dubbo</a></li>
<li><a href="https://zdran.com/20181216.html">Dubbo 学习笔记(二) Spring Boot 整合 Dubbo</a></li>
<li><a href="https://zdran.com/20190212.html">Dubbo 学习笔记(三) Spring Boot 整合 Dubbo(官方版)</a></li>
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<hr>
<h2 id="0-前言"><a href="#0-前言" class="headerlink" title="0. 前言"></a>0. 前言</h2><p>这次使用的是 Apache 推出的 Spring Boot 与 Dubbo 整合的依赖。</p>
<ul>
<li><a target="_blank" rel="noopener" href="https://github.com/apache/incubator-dubbo-spring-boot-project">https://github.com/apache/incubator-dubbo-spring-boot-project</a></li>
<li>最新的版本是 0.2.1 </li>
<li>star:2383</li>
</ul>
<pre><code><dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.1.RELEASE</version>
</dependency>
</code></pre>
<h2 id="1-创建项目"><a href="#1-创建项目" class="headerlink" title="1. 创建项目"></a>1. 创建项目</h2><p>创建一个项目，三个模块分别是服务提供者、服务消费者、服务暴露的API。</p>
<p>项目结构：</p>
<pre><code>official
|-official-api
|-official-account-provider
|-official-web
</code></pre>
<p>主 POM 的依赖：</p>
<pre><code><?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.zdran.duboot</groupId>
<packaging>pom</packaging>
<artifactId>official</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>official</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<spring-boot.version>2.1.1.RELEASE</spring-boot.version>
<dubbo.version>2.6.5</dubbo.version>
</properties>
<modules>
<module>official-api</module>
<module>official-account-provider</module>
<module>official-web</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
</code></pre>
<h2 id="2-配置服务提供者"><a href="#2-配置服务提供者" class="headerlink" title="2. 配置服务提供者"></a>2. 配置服务提供者</h2><p>添加依赖：</p>
<pre><code><?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>
<parent>
<groupId>com.zdran.duboot</groupId>
<artifactId>official</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>com.zdran.official</groupId>
<artifactId>account-provider</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>account-provider</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot.version>2.1.1.RELEASE</spring-boot.version>
<dubbo.version>2.6.5</dubbo.version>
</properties>
<dependencies>
<dependency>
<groupId>com.zdran.duboot</groupId>
<artifactId>official-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!-- Dubbo Spring Boot Starter -->
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>2.1.2.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>2.11.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
</code></pre>
<p>更新 <code>application.yml</code> 的配置：</p>
<pre><code>server:
port: 8086
dubbo:
application:
name: Provide
registry:
address: zookeeper://39.105.78.88:2181
protocol:
name: dubbo
port: 20880
scan:
base-packages: com.zdran.official.user.service
</code></pre>
<p><strong>注意：配置项是 dubbo.xxx,不是 spring.dubbo.xxx</strong></p>
<p>实现 Service:</p>
<pre><code>package com.zdran.official.user.service;
import com.alibaba.dubbo.config.annotation.Service;
import com.zdran.duboot.official.api.OfficialHelloApi;
/**
* Create by ranzd on 2019/1/28
*/
@Service(version = "1.0", timeout = 50000)
public class OfficialHelloApiImpl implements OfficialHelloApi {
@Override
public String sayHello(String name) {
return "helll, " + name;
}
}
</code></pre>
<p><strong>接口定义在了official-api模块</strong></p>
<h2 id="3-实现消费者"><a href="#3-实现消费者" class="headerlink" title="3. 实现消费者"></a>3. 实现消费者</h2><p>添加依赖：</p>
<pre><code><?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.zdran.official</groupId>
<artifactId>web</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>web</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<dubbo.version>2.6.5</dubbo.version>
</properties>
<dependencies>
<dependency>
<groupId>com.zdran.duboot</groupId>
<artifactId>official-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Dubbo Spring Boot Starter -->
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>2.1.2.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>2.11.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
</code></pre>
<p><strong>注意：curator-framework 这个依赖跟使用的zk版本有关系</strong></p>
<p>curator-framework 2.x.x 支持的zk版本为 3.4.x 和3.5.x<br>curator-framework 3.x.x 支持的zk版本为 3.5.x </p>
<p>更新 <code>application.yml</code> 的配置：</p>
<pre><code>server:
port: 8085
dubbo:
application:
name: conusmer
registry:
address: zookeeper://39.105.78.88:2181
protocol:
name: dubbo
port: 20880
scan:
base-packages: com.zdran.official.web
</code></pre>
<p>创建消费者的服务</p>
<pre><code>package com.zdran.official.web.controller;
import com.alibaba.dubbo.config.annotation.Reference;
import com.zdran.duboot.official.api.OfficialHelloApi;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
/**
* Create by ranzd on 2019/1/29
*
*/
@RestController
public class AccountController {
@Reference(version = "1.0")
private OfficialHelloApi officialHelloApi;
@GetMapping("/account/{name}")
public String sayHello(@PathVariable(name = "name") String name) {
return officialHelloApi.sayHello(name);
}
}
</code></pre>
<p>先启动生产者，再启动消费者，启动的时候如果看到 下面的日志说明启动成功了：</p>
<pre><code>2019-02-12 11:09:14.780 INFO 3428 --- [ main] a.b.d.c.e.WelcomeLogoApplicationListener :
:: Dubbo Spring Boot (v0.2.1.RELEASE) : https://github.com/apache/incubator-dubbo-spring-boot-project
:: Dubbo (v2.6.5) : https://github.com/apache/incubator-dubbo
:: Discuss group : [email protected]
2019-02-12 11:09:14.783 INFO 3428 --- [ main] e.OverrideDubboConfigApplicationListener : Dubbo Config was overridden by externalized configuration {dubbo.application.name=Provide, dubbo.application.qos-enable=false, dubbo.config.multiple=true, dubbo.protocol.name=dubbo, dubbo.protocol.port=20880, dubbo.registry.address=zookeeper://39.105.78.88:2181, dubbo.scan.base-packages=com.zdran.official.user.service}
</code></pre>
<p>访问一下 <code>http://localhost:8085/account/dubbo</code> 试试。</p>
<h2 id="4-一个疑问"><a href="#4-一个疑问" class="headerlink" title="4. 一个疑问"></a>4. 一个疑问</h2><p>有个比较疑惑的地方一直没有搞明白。就是 curator-framework 这个依赖。</p>
<p>明明在 dubbo-spring-boot-starter 里是包含这个依赖的，不知道为什么还需要重新引入？</p>
</div>
</v-card-text>
<v-divider class="success lighten-1" ></v-divider>
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