几个假客户端在一个 Spring 应用程序中具有不同的错误解码器

Question

我正在尝试为两个不同的Feign客户端实现两个不同的errorDecoder。 我的应用程序无法启动异常

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.client.ClientFirst': FactoryBean threw exception on object creation; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'feign.codec.ErrorDecoder' available: expected single matching bean but found 2: errorDecoder,ClientFirstErrorDecoder

// First configuration
@RequiredArgsConstructor
@Service
@Slf4j
public class ClientFirstConfiguration {
@Bean(name = "ClientFirstErrorDecoder")
public ErrorDecoder errorDecoder() {
// omitted for brevity
};
}
}
// Second configuration
@RequiredArgsConstructor
@Service
@Slf4j
public class ClientSecondConfiguration {
public ErrorDecoder errorDecoder() {
// omitted for brevity
};
}
}
// First client
@FeignClient(
name = "feign.client.config.first",
url = "${first.url}",
configuration = {
FeignDefaultConfiguration.class,
ClientFirstConfiguration.class
}
)
@Headers({"Content-Type: application/json"})
public interface ClientFirst {
// omitted for brevity
}
// Second client
@FeignClient(
name = "feign.client.config.second",
url = "${second.url}",
configuration = {
FeignDefaultConfiguration.class,
ClientSecondConfiguration.class
}
)
@Headers({"Content-Type: application/json"})
public interface ClientSecond {
// omitted for brevity
}

Answer 1

您正在对配置类使用@Service注释。您不需要这样做。根据文档"FooConfiguration不需要用@Configuration注释。但是，如果是，请注意将其从包含此配置的任何@ComponentScan中排除，因为它将成为假装的默认来源。解码器，假装。编码器，假装。合同等，如指定。