nacos+Dubbo整合快速入门

最新推荐文章于 2025-02-26 11:25:04 发布

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最新推荐文章于 2025-02-26 11:25:04 发布

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分类专栏：微服务文章标签： dubbo 微服务

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本文详细介绍了如何在SpringBoot项目中使用Nacos作为注册中心，配置Dubbo服务接口，以及消费者如何调用服务并遇到的问题及解决方案。

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官网：Nacos Spring Boot 快速开始

下载下载链接
启动：进入bin目录，startup.cmd -m standalone
引入依赖

    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo</artifactId>
        <version>3.0.9</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba.nacos</groupId>
      <artifactId>nacos-client</artifactId>
      <version>2.1.0</version>
    </dependency>

4.配置application.yml

dubbo:
  application:
    name: dubbo-springboot-demo-provider
  protocol:
    name: dubbo
    port: -1
  registry:
    id: nacos-registry
    address: nacos://localhost:8848

5. 提供者：provider包下创建service服务

public interface DemoService {

    String sayHello(String name);

    String sayHello2(String name);

    default CompletableFuture<String> sayHelloAsync(String name) {
        return CompletableFuture.completedFuture(sayHello(name));
    }

}

@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;
    }

    @Override
    public String sayHello2(String name) {
        return "mumu";
    }


}

6.消费者：创建service，需要用到demoservice

package org.mumu.project.provider;

import java.util.concurrent.CompletableFuture;

public interface DemoService {

    String sayHello(String name);

    String sayHello2(String name);

    default CompletableFuture<String> sayHelloAsync(String name) {
        return CompletableFuture.completedFuture(sayHello(name));
    }

}

7.消费者方调用远程服务

@SpringBootApplication(exclude = {
        DataSourceAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class,
        HibernateJpaAutoConfiguration.class})
@EnableDubbo
public class ApiGatewayApplication {

    @DubboReference
    private DemoService demoService;
    
    public static void main(String[] args) {

        ConfigurableApplicationContext context = SpringApplication.run(ApiGatewayApplication.class, args);
        ApiGatewayApplication application = context.getBean(ApiGatewayApplication.class);
        String result = application.doSayHello("world");
        String result2 = application.doSayHello2("world");
        System.out.println("result: " + result);
        System.out.println("result: " + result2);
    }

    public String doSayHello(String name) {
        return demoService.sayHello(name);
    }

    public String doSayHello2(String name) {
        return demoService.sayHello2(name);
    }
}

报错：Failed to check the status of the service org.mumu.apigateway.project.provider.DemoService. No provider available for the service org.mumu.apigateway.project.provider.DemoService from the url

需要注意的是：服务提供方和调用方需要包名一致

http://localhost:8848/nacos/index.html nacos中心