Spring Boot 快速开发 Dubbo 服务

示例演示了如何使用 Dubbo Spring Boot Starter 方式快速开发 Dubbo 应用。

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Dubbo 还提供了包括XML、API 等多种启动与接入方式，更多开发方式和配置细节可参见配置手册。

下载示例代码

完整示例代码在 dubbo-samples 中

下载源码

git clone -b master https://github.com/apache/dubbo-samples.git

cd dubbo-samples/dubbo-samples-spring-boot
ls # 查看目录结构

快速运行示例

编译 Provider 在 dubbo-samples-spring-boot 目录，进入 dubbo-samples-spring-boot-provider 目录并执行 maven 命令

cd ./dubbo-samples-spring-boot-provider
mvn clean package

运行 Provider

java -jar ./target/dubbo-samples-spring-boot-provider-1.0-SNAPSHOT.jar

编译 Consumer 进入 dubbo-samples-spring-boot-consumer 目录并执行 maven 命令

cd ../dubbo-samples-spring-boot-consumer
mvn clean package

运行 consumer

java -jar ./target/dubbo-samples-spring-boot-consumer-1.0-SNAPSHOT.jar

详细解释

定义服务接口

dubbo-samples-spring-boot-interface/DemoService.java

package org.apache.dubbo.samples.basic.api;

public interface DemoService {
    String sayHello(String name);
}

提供方实现接口并暴露服务

dubbo-samples-spring-boot-provider/DemoServiceImpl.java

@DubboService
public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        System.out.println("Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress());
        return "Hello " + name;
    }
}

配置 application.yml 文件

dubbo-samples-spring-boot-provider/resources/application.yml

dubbo:
  application:
    name: dubbo-springboot-demo-provider
  protocol:
    name: dubbo
    port: -1
  registry:
    id: zk-registry
    address: zookeeper://127.0.0.1:2181
  config-center:
    address: zookeeper://127.0.0.1:2181
  metadata-report:
    address: zookeeper://127.0.0.1:2181

定义 Spring Boot 主函数

dubbo-samples-spring-boot-provider/ProviderApplication.java

@SpringBootApplication
@EnableDubbo
public class ProviderApplication {
    public static void main(String[] args) throws Exception {
        new EmbeddedZooKeeper(2181, false).start();

        SpringApplication.run(ProviderApplication.class, args);
        System.out.println("dubbo service started");
        new CountDownLatch(1).await();
    }
}

其中，@EnableDubbo 必须配置。

引用远程服务

dubbo-samples-spring-boot-consumer/ConsumerApplication.java

public class ConsumerApplication {
    @DubboReference
    private DemoService demoService;
}

定义 application.yml

dubbo-samples-spring-boot-consumer/application.yml

dubbo:
  application:
    name: dubbo-springboot-demo-consumer
  protocol:
    name: dubbo
    port: -1
  registry:
    id: zk-registry
    address: zookeeper://127.0.0.1:2181
  config-center:
    address: zookeeper://127.0.0.1:2181
  metadata-report:
    address: zookeeper://127.0.0.1:2181

加载 Spring 配置，并调用远程服务