springcloud中使用dubbo開發rpc服務及調用

spring cloud中基於springboot開發的微服務，是基於http的rest接口，也可以開發基於dubbo的rpc接口。

一，創建goodsService模塊

　　1， 在創建的goodsService模塊中再創建goodsServiceApi和goodsServiceServer模塊

　　2，在oodsServiceApi模塊中定義接口 ，goodsServiceServer用於接口實現

　　3，goodsServiceServer模塊中pom文件引入相關依賴

<dependencies>
        <dependency>
            <groupId>net.biui</groupId>
            <artifactId>goods-service-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-dubbo</artifactId>
        </dependency>
    </dependencies>

　　4，goodsServiceServer中添加配置

spring:
  application:
    name: goods-service
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501

dubbo:
  registry:
    address: nacos://127.0.0.1:8848
  scan:
    base-packages: net.biui.impl
  protocol:
    port: 20881
    name: dubbo

　　5，goodsServiceServer編寫接口實現

@org.apache.dubbo.config.annotation.Service
public class GoodsImpl implements GoodsApi {
    public String getGoodsName() {
        return "商品一";
    }
}

　　6，goodsServiceServer編寫啟動類

@SpringBootApplication
@EnableDiscoveryClient
public class GoodsServiceServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(GoodsServiceServerApplication.class, args);
    }
}

啟動后，dubbo服務會自動注冊到nacos服務發現中心

二，創建調用dubbo服務的模塊

　　1，new -> module -> 填寫信息 -> finish

　　2，添加pom依賴

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>net.biui</groupId>
            <artifactId>goods-service-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

　　3，添加配置

spring:
  application:
    name: demo-dubbo
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        namespace: c22e5019-0bee-43b1-b80b-fc0b9d847501

　　4，編寫controller調用dubbo服務

@RestController
@RequestMapping("/demo")
public class demoController {

    @org.apache.dubbo.config.annotation.Reference
    GoodsApi goodsApi;

    @GetMapping("/test")
    public String test(){
        return "test " + goodsApi.getGoodsName();
    }
}

　　5，編寫啟動類

@SpringBootApplication
@EnableDiscoveryClient
public class demoDubboApplication {
    public static void main(String[] args) {
        SpringApplication.run(demoDubboApplication.class, args);
    }
}

啟動后，demo-dubbo服務也會自動注冊到nacos（因為nacos.register.enable默認為true，即代表自動注冊，可以只訂閱，不注冊），對應接口返回了dubbo服務返回的信息！