注射假客户

Question

我有一个错误，当我注入feignClient接口在我的服务。这是我使用的Spring引导和Spring云版本：

组织。springframework。启动：spring启动程序父级：2.0.6。发布spring云版本：Finchley。SR2

但是当我在我的类服务中创建一个虚假客户端bean时，它就工作了。

创建客户外部客户端：

@Component("DepartmentClient")
@FeignClient(name = "DEPARTMENT-SERVICE", url = "http://test")
public interface DepartmentClient {

    @RequestMapping(value = "/department/{departmentId}", method = RequestMethod.GET)
    void findDepartmetById(@PathVariable("departmentId") int departmentId);

}

我把这个假冒的客户注入军队

@Service
public class AgentService {

    Logger logger = LoggerFactory.getLogger(AgentService.class);

    @Autowired
    private AgentRepository agentRepository;

    @Autowired
    private DepartmentClient departmentClient;
....
}

输出

Field departmentClient in ...AgentService required a bean of type '...DepartmentClient' that could not be found.
The injection point has the following annotations:
org.springframework.beans.factory.annotation.Autowired(required=true)
Action:

Consider defining a bean of type .... DepartmentClient' in your configuration.

Answer 1

在上面的答案中添加更多细节：

在@FeignClient注释中，字符串值（“上面的department”）是一个任意的客户端名称，用于创建功能区负载平衡器。还可以使用URL属性（绝对值或仅主机名）指定URL。应用程序上下文中bean的名称是接口的完全限定名。要指定自己的别名值，可以使用@FeignClient注释的限定符值。

要使外部客户正常工作，我们需要执行以下步骤：

1.外部客户端的更改：它应该是一个带有外部客户端注释的接口

@FeignClient(
  name = "DEPARTMENT-SERVICE",
  configuration = {DepartmentConfiguration.class},
  fallback = DepartmentFallback.class
)
@RequestMapping(
  value = {"${service.apipath.department}"},
  consumes = {"application/json"},
  produces = {"application/json"}
)
public interface DepartmentClient {

  @RequestMapping(value = "/department/{departmentId}", method = 
    RequestMethod.GET)
  void findDepartmetById(@PathVariable("departmentId") int departmentId);

}

2.主要类别的变化：

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

Answer 2

您是否尝试删除模拟界面的@Component？

否则看看您的spring应用程序组件扫描，如果您的接口不是扫描，那么bean将不会被创建

Answer 3

要让FaignClient工作，您必须将@EnableFaignClients添加到配置类或@SpringBootApplication类

@SpringBootApplication
@EnableFeignClients
public class FooMain {  // Your Main class
    public static void main(String[] args) {
        SpringApplication.run(FooMain.class, args);
    }
}