我正在尝试使用 feignclients 为多个 spring 控制器设置代理。
一个非常简单的架构解释是，我创建了 spring 微服务并使用 consul 进行服务发现和键值存储（主要用于注册同一服务的多个实例，稍后进行负载平衡）。
spring 服务有几个公共 api（例如，在我的例子中是 UserApi 和 UserAuthApi）：
public interface UserAuthApi {
@Deprecated
@GetMapping("/auth/login")
UserAuthDto getAuthUserByEmail(@RequestParam("email") String email);
...
在不同的服务中，我想使用这些 api 设置样板 Feignclients。我有一个正在为 UserAuthApi 运行和工作：
@FeignClient(name = "mcs-user", path = "/user")
public interface UserAuthApiProxy extends UserAuthApi {
}
然而，当我试图为其他 api 创建代理时，我无法使用这个原则：
@FeignClient(name = "mcs-user", path = "/user")
public interface UserApiProxy extends UserApi {
}
代替临时工。解决方法我可以删除“扩展 UserApi”并在我的代理中复制方法定义。我无法像我正在尝试的那样从一项服务中找到使用多个样板 API 的任何信息或示例。在研究显示的错误的解决方案时，我尝试设置“-parameters”，但它没有影响任何东西。
我还尝试为这些接口创建一个 @RequestMapping(...) 来区分它们的路径，并在 feignclient 接口中附加值，但根本没有改变。 除此之外，我的应用程序属性中也有“spring.main.allow-bean-definition-overriding=true”。
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService': Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userApi': Error creating bean with name 'sk.fmfi.listng.rest.proxy.user.UserApiProxy': FactoryBean threw exception on object creation
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:713) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:693) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:133) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:482) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1416) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:973) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[spring-context-6.0.7.jar:6.0.7]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584) ~[spring-context-6.0.7.jar:6.0.7]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.5.jar:3.0.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-3.0.5.jar:3.0.5]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-3.0.5.jar:3.0.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[spring-boot-3.0.5.jar:3.0.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[spring-boot-3.0.5.jar:3.0.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[spring-boot-3.0.5.jar:3.0.5]
at sk.fmfi.listng.rest.RestApplication.main(RestApplication.java:17) ~[classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userApi': Error creating bean with name 'sk.fmfi.listng.rest.proxy.user.UserApiProxy': FactoryBean threw exception on object creation
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:713) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:693) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:133) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:482) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1416) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1417) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1337) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:710) ~[spring-beans-6.0.7.jar:6.0.7]
... 20 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sk.fmfi.listng.rest.proxy.user.UserApiProxy': FactoryBean threw exception on object creation
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:154) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:90) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1823) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1273) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:259) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1640) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1597) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1337) ~[spring-beans-6.0.7.jar:6.0.7]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:710) ~[spring-beans-6.0.7.jar:6.0.7]
... 34 common frames omitted
Caused by: java.lang.IllegalStateException: RequestParam.value() was empty on parameter 1
at feign.Util.checkState(Util.java:136) ~[feign-core-12.1.jar:na]
at org.springframework.cloud.openfeign.annotation.RequestParamParameterProcessor.processArgument(RequestParamParameterProcessor.java:63) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at org.springframework.cloud.openfeign.support.SpringMvcContract.processAnnotationsOnParameter(SpringMvcContract.java:298) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:126) ~[feign-core-12.1.jar:na]
at org.springframework.cloud.openfeign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:197) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:65) ~[feign-core-12.1.jar:na]
at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:142) ~[feign-core-12.1.jar:na]
at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:58) ~[feign-core-12.1.jar:na]
at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:50) ~[feign-core-12.1.jar:na]
at feign.Feign$Builder.target(Feign.java:197) ~[feign-core-12.1.jar:na]
at org.springframework.cloud.openfeign.DefaultTargeter.target(DefaultTargeter.java:30) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:398) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:446) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:421) ~[spring-cloud-openfeign-core-4.0.2.jar:4.0.2]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:148) ~[spring-beans-6.0.7.jar:6.0.7]
... 45 common frames omitted
有没有一种方法可以从一个服务中实现这些样板 api 而不必将方法定义从目标 api 复制到我的 feignclient 接口（显然这意味着必须同时在两个地方维护代码的问题）？
提前感谢您的任何评论和帮助:)