Spring
공식 DOC
https://docs.spring.io/spring-cloud-openfeign/docs/current/reference/html/
Spring Cloud OpenFeign
Feign is a declarative web service client. It makes writing web service clients easier. To use Feign create an interface and annotate it. It has pluggable annotation support including Feign annotations and JAX-RS annotations. Feign also supports pluggable
docs.spring.io