SpringCloud整合Dubbo入门demo

有的开发团队使用dubbo原因是因为dubbo性能比feign高

代码地址

出自图灵学院 我做完作业 自己整理了一下

https://gitee.com/zjj19941/ZJJ_Dubbo/tree/master/spring-cloud-alibaba-dubbo

使用说明

1.执行sql脚本
2.自己准备nacos服务
3.先启动 user.SpringCloudDubboProviderUserApplication
4.再启动 user.SpringCloudDubboConsumerUserApplication
5.发起get请求:localhost:8080/user/info/1 就能查看效果

开始配置

1. provider端配置

引入依赖

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

application.yml

dubbo:
  scan:
    # 指定 Dubbo 服务实现类的扫描基准包
    base-packages: com.tuling.mall.user.service
#  application:
#    name: ${spring.application.name}
  protocol:
    # dubbo 协议
    name: dubbo
    # dubbo 协议端口（ -1 表示自增端口，从 20880 开始）
    port: -1
#  registry:
#    #挂载到 Spring Cloud 注册中心  高版本可选
#    address: spring-cloud://127.0.0.1:8848
spring:
  application:
    name: spring-cloud-dubbo-provider-user
  main:
    # Spring Boot2.1及更高的版本需要设定
    allow-bean-definition-overriding: true
  cloud:
    nacos:
      # Nacos 服务发现与注册配置
      discovery:
        server-addr: 127.0.0.1:8848

服务实现类上配置@DubboService暴露服务

@DubboService
public class UserServiceImpl implements UserService {

   @Autowired
   private UserMapper userMapper;

   @Override
   public List<User> list() {
      return userMapper.list();
   }

   @Override
   public User getById(Integer id) {
      return userMapper.getById(id);
   }
}

2. consumer端配置

引入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

application.yml

dubbo:
  cloud:
    # 指定需要订阅的服务提供方，默认值*，会订阅所有服务，不建议使用
    subscribed-services: spring-cloud-dubbo-provider-user
#  application:
#    name: ${spring.application.name}
  protocol:
    # dubbo 协议
    name: dubbo
    # dubbo 协议端口（ -1 表示自增端口，从 20880 开始）
    port: -1
#  registry:
#    #挂载到 Spring Cloud 注册中心  高版本可选
#    address: spring-cloud://127.0.0.1:8848

spring:
  application:
    name: spring-cloud-dubbo-consumer-user
  main:
    # Spring Boot2.1及更高的版本需要设定
    allow-bean-definition-overriding: true
  cloud:
    nacos:
      # Nacos 服务发现与注册配置
      discovery:
        server-addr: 127.0.0.1:8848

当应用使用属性dubbo.cloud.subscribed-services为默认值时，日志中将会输出警告：

服务消费方通过@DubboReference引入服务

@RestController
@RequestMapping("/user")
public class UserConstroller {

    @DubboReference
    private UserService userService;

    @RequestMapping("/info/{id}")
    public User info(@PathVariable("id") Integer id){

        return userService.getById(id);
    }

    @RequestMapping("/list")
    public List<User> list(){

        return userService.list();
    }
}