Spring / Spring7 basics Interview questions
What is the purpose of HTTP Interface clients in Spring?
HTTP Interface clients let you declare a remote service as a plain Java interface annotated with @HttpExchange (and its @GetExchange, @PostExchange shortcuts), and Spring generates a working proxy implementation at runtime - no boilerplate client code to write by hand.
@HttpExchange("/accounts") public interface AccountClient { @GetExchange("/{id}") Account getAccount(@PathVariable int id); }
Behind the scenes, the generated proxy delegates to an underlying RestClient or WebClient, so it inherits whatever interceptors, error handling, and API-versioning configuration that client has. This declarative style mirrors how @FeignClient works in Spring Cloud, but it's built directly into core Spring, with no extra dependency required.
How is an HTTP Interface client declared?
What does the generated HTTP Interface proxy delegate to under the hood?
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