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Spring Cloud与Dubbo整合配置指南

1. Spring Cloud整合Dubbo

1.1 provider端配置

为了实现Spring Cloud与Dubbo的无缝集成，我们需要先在提供方进行相应的配置。以下是具体的实现步骤：

引入依赖

在项目根目录的pom.xml中添加以下依赖：

       
    
     com.alibaba.cloud
        
    
     spring-cloud-starter-dubbo
    
   
       
    
     com.alibaba.cloud
        
    
     spring-cloud-starter-alibaba-nacos-discovery
    
   

application.yml配置

在application.yml中添加以下配置：

dubbo:  scan:    base-packages: com.tuling.mall.user.service  protocol:    name: dubbo    port: -1  registry:    address: spring-cloud://127.0.0.1:8848spring:  application:    name: spring-cloud-dubbo-provider-user  main:    allow-bean-definition-overriding: true  cloud:    nacos:      discovery:        server-addr: 127.0.0.1:8848

服务实现类配置

在服务实现类上使用@DubboService注解，确保服务能够被正确暴露：

import org.springframework.stereotype.Component;import com.alibaba.dubbo.service.DubboService;@Component@DubboServicepublic class UserServiceImpl implements UserService {    @Autowired    private UserMapper userMapper;    @Override    public List
   
     list() {        return userMapper.list();    }    @Override    public User getById(Integer id) {        return userMapper.getById(id);    }}
   

1.2 consumer端配置

引入依赖

在消费方项目中添加以下依赖：

       
    
     org.springframework.boot
        
    
     spring-boot-starter-web
    
   
       
    
     com.alibaba.cloud
        
    
     spring-cloud-starter-dubbo
    
   
       
    
     com.alibaba.cloud
        
    
     spring-cloud-starter-alibaba-nacos-discovery
    
   
       
    
     org.springframework.cloud
        
    
     spring-cloud-starter-openfeign
    
   

application.yml配置

在application.yml中添加以下配置：

dubbo:  cloud:    subscribed-services: spring-cloud-dubbo-provider-user  protocol:    name: dubbo    port: -1  registry:    address: spring-cloud://127.0.0.1:8848spring:  application:    name: spring-cloud-dubbo-consumer-user  main:    allow-bean-definition-overriding: true  cloud:    nacos:      discovery:        server-addr: 127.0.0.1:8848

服务消费方引入依赖

在消费方中使用@DubboReference注解引入服务：

@RestController@RequestMapping("/user")public class UserController {    @DubboReference    private UserService userService;    @Autowired    private RestTemplate restTemplate;    @Bean    @LoadBalanced    @DubboTransported    public RestTemplate restTemplate() {        return new RestTemplate();    }    @RequestMapping("/list")    public List
   
     list() {        return userService.list();    }}
   

1.3 Open Feign迁移到Dubbo

服务提供方配置

在服务提供方添加以下注解：

@RestController@RequestMapping("/user")public class UserServiceImpl implements UserService {    @Autowired    private UserMapper userMapper;    @Override    @RequestMapping("/list")    public List
   
     list() {        return userMapper.list();    }    @Override    @RequestMapping("/getById/{id}")    public User getById(@PathVariable("id") Integer id) {        return userMapper.getById(id);    }}
   

服务消费方配置

在消费方中使用@DubboTransported注解：

@FeignClient(value = "spring-cloud-dubbo-provider-user-feign", path = "/user")@DubboTransported(protocol = "dubbo")public interface UserDubboFeignService {    @RequestMapping("/list")    public List
   
     list();    @RequestMapping("/getById/{id}")    public User getById(@PathVariable("id") Integer id);}@FeignClient(value = "spring-cloud-dubbo-provider-user-feign", path = "/user")public interface UserFeignService {    @RequestMapping("/list")    public List
    
      list();    @RequestMapping("/getById/{id}")    public User getById(@PathVariable("id") Integer id);}
    
   

调用对象配置

在控制器中使用@DubboReference注解：

@RestController@RequestMapping("/user")public class UserController {    @DubboReference    private UserService userService;    @Autowired    @DubboTransported    private UserFeignService userFeignService;    @Autowired    private UserDubboFeignService userDubboFeignService;    @Autowired    private RestTemplate restTemplate;    @Bean    @LoadBalanced    @DubboTransported    public RestTemplate restTemplate() {        return new RestTemplate();    }    @RequestMapping("/list")    public List
   
     list() {        return userFeignService.list();    }    @RequestMapping("/list2")    public List
    
      list2() {        return userDubboFeignService.list();    }    @RequestMapping("/list3")    public List
     
       list3() {        return restTemplate.getForObject("http://spring-cloud-dubbo-provider-user-feign/user/list", List.class);    }}
     
    
   

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