343 lines
11 KiB
Markdown
343 lines
11 KiB
Markdown
# spring 整合 dubbo（注解方式）
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## 目录<br/>
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<a href="#一-项目结构说明">一、 项目结构说明</a><br/>
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<a href="#二项目依赖">二、项目依赖</a><br/>
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<a href="#三公共模块dubbo-ano-common">三、公共模块（dubbo-ano-common）</a><br/>
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<a href="#四-服务提供者dubbo-ano-provider">四、 服务提供者（dubbo-ano-provider）</a><br/>
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<a href="#41-提供方配置">4.1 提供方配置</a><br/>
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<a href="#42--使用注解@Service暴露服务">4.2 使用注解@Service暴露服务</a><br/>
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<a href="#五服务消费者dubbo-ano-consumer">五、服务消费者（dubbo-ano-consumer）</a><br/>
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<a href="#1消费方的配置">1.消费方的配置</a><br/>
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<a href="#2使用注解@Reference引用远程服务">2.使用注解@Reference引用远程服务</a><br/>
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<a href="#六项目构建的说明">六、项目构建的说明</a><br/>
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<a href="#七关于dubbo新版本管理控制台的安装说明">七、关于dubbo新版本管理控制台的安装说明</a><br/>
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## 正文<br/>
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## 一、 项目结构说明
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1.1 按照 dubbo 文档推荐的服务最佳实践，建议将服务接口、服务模型、服务异常等均放在 API 包中，所以项目采用 maven 多模块的构建方式，在 spring-dubbo-annotation 下构建三个子模块：
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1. dubbo-ano-common 是公共模块，用于存放公共的接口和 bean,被 dubbo-ano-provider 和 dubbo-ano-provider 在 pom.xml 中引用；
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2. dubbo-ano-provider 是服务的提供者，提供商品的查询服务；
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3. dubbo-ano-provider 是服务的消费者，调用 provider 提供的查询服务。
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1.2 本项目 dubbo 的搭建采用 zookeeper 作为注册中心， 关于 zookeeper 的安装和基本操作可以参见我的手记[Zookeeper 基础命令与 Java 客户端](https://github.com/heibaiying/LearningNotes/blob/master/notes/%E4%B8%AD%E9%97%B4%E4%BB%B6/ZooKeeper/ZooKeeper%E9%9B%86%E7%BE%A4%E6%90%AD%E5%BB%BA%E4%B8%8EJava%E5%AE%A2%E6%88%B7%E7%AB%AF.md)
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-dubbo.png"/> </div>
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## 二、项目依赖
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**在父工程的项目中统一导入依赖 dubbo 依赖的的 jar 包**
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这里需要注意的是 ZooKeeper 3.5.x 和 ZooKeeper 3.4.x 是存在不兼容的情况 详见官网解释[ZooKeeper Version Compatibility](https://curator.apache.org/zk-compatibility.html), zookeeper 3.5 目前是 beta 版本，所以 zookeeper 我选择的版本是 zookeeper-3.4.9 作为服务端。但默认情况下 curator-framework 自动引用的最新的 3.5 的版本客户端，会出现 KeeperException$UnimplementedException 异常
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```xml
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<!--dubbo 依赖-->
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<groupId>com.alibaba</groupId>
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<artifactId>dubbo</artifactId>
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<version>2.6.2</version>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-framework</artifactId>
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<version>4.0.0</version>
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<exclusions>
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<exclusion>
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<groupId>org.apache.zookeeper</groupId>
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<artifactId>zookeeper</artifactId>
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</exclusion>
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</exclusions>
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</dependency>
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<dependency>
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<groupId>org.apache.zookeeper</groupId>
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<artifactId>zookeeper</artifactId>
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<version>3.4.13</version>
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</dependency>
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```
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## 三、公共模块（dubbo-ano-common）
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- api 下为公共的调用接口；
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- bean 下为公共的实体类。
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/dubbo-ano-common.png"/> </div>
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## 四、 服务提供者（dubbo-ano-provider）
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/dubbo-ano-provider.png"/> </div>
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#### 4.1 提供方配置
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```java
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@Configuration
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public class DubboConfiguration {
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/**
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* 提供方应用信息，用于计算依赖关系
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*/
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@Bean
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public ApplicationConfig applicationConfig() {
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ApplicationConfig applicationConfig = new ApplicationConfig();
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applicationConfig.setName("dubbo-ano-provider");
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return applicationConfig;
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}
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/**
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* 使用 zookeeper 注册中心暴露服务地址
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*/
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@Bean
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public RegistryConfig registryConfig() {
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RegistryConfig registryConfig = new RegistryConfig();
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registryConfig.setAddress("zookeeper://127.0.0.1:2181");
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registryConfig.setClient("curator");
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return registryConfig;
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}
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/**
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* 用 dubbo 协议在 20880 端口暴露服务
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*/
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@Bean
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public ProtocolConfig protocolConfig() {
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ProtocolConfig protocolConfig = new ProtocolConfig();
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protocolConfig.setName("dubbo");
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protocolConfig.setPort(20880);
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return protocolConfig;
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}
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}
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```
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#### 4.2 使用注解@Service暴露服务
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需要注意的是这里的@Service 注解不是 spring 的注解，而是 dubbo 的注解 com.alibaba.dubbo.config.annotation.Service
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```java
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package com.heibaiying.service;
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import com.alibaba.dubbo.config.annotation.Service;
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import com.heibaiying.api.IProductService;
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import com.heibaiying.bean.Product;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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/**
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* @author : heibaiying
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* @description : 产品提供接口实现类
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*/
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@Service(timeout = 5000)
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public class ProductService implements IProductService {
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private static List<Product> productList = new ArrayList<>();
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static {
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for (int i = 0; i < 20; i++) {
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productList.add(new Product(i, "产品" + i, i / 2 == 0, new Date(), 66.66f * i));
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}
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}
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public Product queryProductById(int id) {
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for (Product product : productList) {
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if (product.getId() == id) {
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return product;
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}
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}
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return null;
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}
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public List<Product> queryAllProducts() {
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return productList;
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}
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}
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```
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## 五、服务消费者（dubbo-ano-consumer）
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/dubbo-ano-consumer.png"/> </div>
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#### 1.消费方的配置
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```java
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@Configuration
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public class DubboConfiguration {
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/**
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* 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
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*/
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@Bean
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public ApplicationConfig applicationConfig() {
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ApplicationConfig applicationConfig = new ApplicationConfig();
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applicationConfig.setName("dubbo-ano-consumer");
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return applicationConfig;
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}
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/**
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* 设置调用服务超时时间
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* 关闭所有服务的启动时检查
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*/
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@Bean
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public ConsumerConfig consumerConfig() {
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ConsumerConfig consumerConfig = new ConsumerConfig();
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consumerConfig.setTimeout(3000);
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consumerConfig.setCheck(false);
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return consumerConfig;
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}
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/**
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* 使用 zookeeper 注册中心暴露发现服务地址
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*/
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@Bean
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public RegistryConfig registryConfig() {
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RegistryConfig registryConfig = new RegistryConfig();
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registryConfig.setAddress("zookeeper://127.0.0.1:2181");
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registryConfig.setClient("curator");
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return registryConfig;
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}
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}
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```
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#### 2.使用注解@Reference引用远程服务
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```java
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package com.heibaiying.controller;
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import com.alibaba.dubbo.config.annotation.Reference;
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import com.heibaiying.api.IProductService;
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import com.heibaiying.bean.Product;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.Model;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.RequestMapping;
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import java.util.List;
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@Controller
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@RequestMapping("sell")
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public class SellController {
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// dubbo 远程引用注解
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@Reference
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private IProductService productService;
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@RequestMapping
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public String productList(Model model) {
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List<Product> products = productService.queryAllProducts();
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model.addAttribute("products", products);
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return "products";
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}
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@RequestMapping("product/{id}")
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public String productDetail(@PathVariable int id, Model model) {
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Product product = productService.queryProductById(id);
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model.addAttribute("product", product);
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return "product";
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}
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}
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```
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## 六、项目构建的说明
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因为在项目中，consumer 和 provider 模块均依赖公共模块,所以在构建 consumer 和 provider 项目前需要将 common 模块安装到本地仓库，**依次**对**父工程**和**common 模块**执行：
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```shell
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mvn install -Dmaven.test.skip = true
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```
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consumer 中 pom.xml 如下
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>spring-dubbo-annotation</artifactId>
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<groupId>com.heibaiying</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>dubbo-ano-consumer</artifactId>
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<dependencies>
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<dependency>
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<groupId>com.heibaiying</groupId>
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<artifactId>dubbo-ano-common</artifactId>
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<version>1.0-SNAPSHOT</version>
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<scope>compile</scope>
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</dependency>
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</dependencies>
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</project>
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```
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provider 中 pom.xml 如下
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>spring-dubbo-annotation</artifactId>
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<groupId>com.heibaiying</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>dubbo-ano-provider</artifactId>
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<dependencies>
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<dependency>
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<groupId>com.heibaiying</groupId>
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<artifactId>dubbo-ano-common</artifactId>
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<version>1.0-SNAPSHOT</version>
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<scope>compile</scope>
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</dependency>
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</dependencies>
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</project>
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```
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## 七、关于dubbo新版本管理控制台的安装说明
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安装:
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```sh
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git clone https://github.com/apache/incubator-dubbo-ops.git /var/tmp/dubbo-ops
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cd /var/tmp/dubbo-ops
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mvn clean package
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```
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配置：
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```sh
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配置文件为：
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dubbo-admin-backend/src/main/resources/application.properties
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主要的配置有 默认的配置就是 127.0.0.1:2181：
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dubbo.registry.address=zookeeper://127.0.0.1:2181
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```
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启动:
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```sh
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mvn --projects dubbo-admin-backend spring-boot:run
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```
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访问:
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```
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http://127.0.0.1:8080
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```
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