advancedSpring Security
What is @HttpExchange in Spring Boot 3? How does it replace Feign?
@HttpExchange is Spring's own declarative HTTP client — define an interface with @GetExchange/@PostExchange annotations, register it via HttpServiceProxyFactory backed by WebClient or RestClient. Similar convenience to OpenFeign, but built into core Spring Framework with no extra dependency, and integrates natively with observability and virtual threads.
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