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Spring Cloud Alibaba Dubbo Spring Cloud Alibaba和Dubbo融合实现

西街青年 人气:0

服务提供者

创建一个名为 hello-dubbo-nacos-provider 的服务提供者项目

POM

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.6.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <groupId>com.antoniopeng</groupId>
  <artifactId>hello-dubbo-nacos-provider</artifactId>
  <packaging>pom</packaging>
  
  <modules>
    <module>hello-dubbo-nacos-provider-api</module>
    <module>hello-dubbo-nacos-provider-service</module>
  </modules>
</project>

该项目下有两个子模块,分别是 hello-dubbo-nacos-provider-api 和 hello-dubbo-nacos-provider-service,前者用于定义接口,后者用于实现接口。

服务提供者接口模块

在服务提供者项目下创建一个名为 hello-dubbo-nacos-provider-api 的模块, 该项目模块只负责 定义接口

POM

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.antoniopeng</groupId>
    <artifactId>hello-dubbo-nacos-provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>

  <artifactId>hello-dubbo-nacos-provider-api</artifactId>
  <packaging>jar</packaging>
</project>

定义一个接口

public interface EchoService {
  String echo(String string);
}

服务提供者接口实现模块

创建名为 hello-dubbo-nacos-provider-service 服务提供者接口的实现模块,用于实现在接口模块中定义的接口。

引入依赖

在 pom.xml 中主要添加以下依赖

<!-- Nacos And Dubbo-->
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-serialization-kryo</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>dubbo-registry-nacos</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba.nacos</groupId>
	<artifactId>nacos-client</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba.spring</groupId>
	<artifactId>spring-context-support</artifactId>
</dependency>

<!-- 依赖接口模块,用于实现接口 -->
<dependency>
	<groupId>com.antoniopeng</groupId>
	<artifactId>hello-dubbo-nacos-provider-api</artifactId>
	<version>${project.parent.version}</version>
</dependency>

相关配置

在 application.yml 中加入相关配置

spring:
 application:
  name: dubbo-nacos-provider
 main:
  allow-bean-definition-overriding: true
dubbo:
 scan:
  # 接口扫描路径
  base-packages: com.antoniopeng.hello.dubbo.nacos.provider.service
 protocol:
  name: dubbo
  # -1 代表自动分配端口
  port: -1
  # 配置高速序列化规则
  serialization: kryo
 registry:
  # 服务注册地址,也就是 Nacos 的服务器地址
  address: nacos://192.168.127.132:8848
 provider:
  # 配置负载均衡策略(轮询)
  loadbalance: roundrobin

附:Duubo 负载均衡策略

实现接口

通过 org.apache.dubbo.config.annotation 包下的 @Service 注解将接口暴露出去

import com.antoniopeng.hello.dubbo.nacos.provider.api.EchoService;
import org.apache.dubbo.config.annotation.Service;

@Service(version = "1.0.0")
public class EchoServiceImpl implements EchoService {

  @Override
  public String echo(String string) {
    return "Echo Hello Dubbo " + string;
  }
}

注意:@Service 注解要注明 version 属性

验证是否成功

启动项目,通过浏览器访问Nacos Server 网址 http://192.168.127.132:8848/nacos ,会发现有一个服务已经注册在服务列表中。

服务消费者

创建一个名为 hello-dubbo-nacos-consumer 的服务消费者项目

引入依赖

同样在 pom.xml中添加以下主要依赖

<!-- Nacos And Dubbo -->
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-serialization-kryo</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-spring-boot-actuator</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>dubbo-registry-nacos</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba.nacos</groupId>
	<artifactId>nacos-client</artifactId>
</dependency>
<dependency>
	<groupId>com.alibaba.spring</groupId>
	<artifactId>spring-context-support</artifactId>
</dependency>

<!-- 依赖服务提供者接口模块,用于调用接口 -->
<dependency>
	<groupId>com.antoniopeng</groupId>
	<artifactId>hello-dubbo-nacos-provider-api</artifactId>
	<version>${project.parent.version}</version>
</dependency>

相关配置

在 application.yml 中添加以下配置

spring:
 application:
  name: dubbo-nacos-consumer
 main:
  allow-bean-definition-overriding: true

dubbo:
 scan:
  # 配置 Controller 扫描路径
  base-packages: com.antoniopeng.dubbo.nacos.consumer.controller
 protocol:
  name: dubbo
  port: -1
 registry:
  address: nacos://192.168.127.132:8848

server:
 port: 8080

# 服务监控检查
endpoints:
 dubbo:
  enabled: true
management:
 health:
  dubbo:
   status:
    defaults: memory
    extras: threadpool
 endpoints:
  web:
   exposure:
    include: "*"

Controller

通过 org.apache.dubbo.config.annotation 包下的 @Reference 注解以 RPC 通信的方式调用服务,而对外提供以 HTTP 通信的方式的 Restful API

import com.antoniopeng.dubbo.nacos.provider.api.EchoService;
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;

@RestController
public class EchoController {

  @Reference(version = "1.0.0")
  private EchoService echoService;

  @GetMapping(value = "/echo/{string}")
  public String echo(@PathVariable String string) {
    return echoService.echo(string);
  }
}

验证是否成功

通过浏览器访问 Nacos Server 网址 http:192.168.127.132:8848/nacos ,会发现又多了一个服务在服务列表中。

然后再访问服务消费者对外提供的 RESTful API http://localhost:8080/echo/hi,浏览器会响应以下内容:

Echo Hello Dubbo hi

到此,实现了 Nacos 与 Dubbo 的融合。

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