springboot快速集成dubbo

野性酷女 2022-02-25 00:02 224阅读 0赞

当springboot和dubbo走到了一起，那么如何让它两更快更容易的集成在一起呢？[dubbo-spring-boot-starter][]帮助我们做到了这点，它实现了dubbo在springboot项目中自动配置（@EnableAutoConfiguration）。

## dubbo-spring-boot-starter模块 ##

dubbo-spring-boot-starter主要由以下部分内容组成：

*  dubbo-spring-boot-parent 模块主要管理 Dubbo Spring Boot 工程的 Maven 依赖；
 *  dubbo-spring-boot-autoconfigure 模块提供 Spring Boot’s @EnableAutoConfiguration 的实现 - DubboAutoConfiguration， 它简化了 Dubbo 核心组件的装配；
 *  dubbo-spring-boot-actuator 提供 Production-Ready 特性：健康检查、控制断点、外部化配置等；

## dubbo-starter方式集成dubbo案例 ##

现在通过一个案例来看springboot使用dubbo-spring-boot-starter来集成dubbo是多么简单的事儿。

> 这里通过dubbo直连的方式，不引入注册中心。

首先在项目POM文件中中引入如下信息（制定dubbo的版本号以及dubbo的依赖管理）：

<properties>
            <dubbo.version>2.7.0</dubbo.version>
        </properties>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>${spring-boot.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
                <dependency>
                    <groupId>org.apache.dubbo</groupId>
                    <artifactId>dubbo-dependencies-bom</artifactId>
                    <version>${dubbo.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
    
                <dependency>
                    <groupId>org.apache.dubbo</groupId>
                    <artifactId>dubbo</artifactId>
                    <version>${dubbo.version}</version>
                    <exclusions>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>javax.servlet</groupId>
                            <artifactId>servlet-api</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>log4j</groupId>
                            <artifactId>log4j</artifactId>
                        </exclusion>
                    </exclusions>
                </dependency>
            </dependencies>
        </dependencyManagement>

然后定义一个公共的server-api：

public interface HelloService { 
    
        String hello(String name);
    }

### springboot-dubbo-provider ###

在服务提供者中引入如下依赖：

<dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>

在application.yml文件中设置dubbo的简单配置：

spring:
      application:
        name: springboot-dubbo-provider
    
    dubbo:
    # application:
    # name: #defualt is ${spring.application.name}
      protocol:
        name: dubbo
        port: 28080
      registry:
        address: N/A
      scan:
        base-packages: com.lazycece.sbac.dubbo.provider.service
      provider:
        group: demo

HelloSerice服务提供信息如下：

package com.lazycece.sbac.dubbo.provider.service;
    
    import com.lazycece.sbac.dubbo.api.HelloService;
    import org.apache.dubbo.config.annotation.Service;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Component;
    
    /** * @author lazycece * @date 2019/03/30 */
    @Component
    @Service(version = "1.0.0", timeout = 3000)
    public class HelloServiceImpl implements HelloService { 
    
        @Value("${dubbo.application.name}")
        private String serviceName;
    
        @Override
        public String hello(String name) { 
            return String.format("Hello, %s ! the service is %s", name, serviceName);
        }
    }

### springboot-dubbo-consumer ###

在服务消费者中引入如下依赖：

在application.yml文件中设置dubbo的简单配置：

spring:
      application:
        name: springboot-dubbo-consumer
    dubbo:
      consumer:
        group: demo

HelloSerice服务消费案例代码如下：

package com.lazycece.sbac.dubbo.consumer.controller;
    
    import com.lazycece.sbac.dubbo.api.HelloService;
    import org.apache.dubbo.config.annotation.Reference;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * @author lazycece * @date 2019/03/30 */
    @RestController
    public class HelloController { 
    
        @Reference(version = "1.0.0", url = "dubbo://127.0.0.1:28080")
        private HelloService helloService;
    
        @GetMapping("/hello/{name}")
        public String hello(@PathVariable String name) { 
            return helloService.hello(name);
        }
    }

### 结果验证 ###

在浏览器访问如下地址：[http://localhost:8080/hello/lazycece][http_localhost_8080_hello_lazycece]

输出信息为： Hello, lazycece ! the service is springboot-dubbo-provider

## 案例代码 ##

案例代码地址：[https://github.com/lazycece/springboot-actual-combat/tree/master/springboot-ac-dubbo][https_github.com_lazycece_springboot-actual-combat_tree_master_springboot-ac-dubbo]

[dubbo-spring-boot-starter]: https://github.com/apache/incubator-dubbo-spring-boot-project
[http_localhost_8080_hello_lazycece]: http://localhost:8080/hello/lazycece
[https_github.com_lazycece_springboot-actual-combat_tree_master_springboot-ac-dubbo]: https://github.com/lazycece/springboot-actual-combat/tree/master/springboot-ac-dubbo