Annotation Interface Idempotent

@Target({METHOD,TYPE})
@Retention(RUNTIME)
@Documented
public @interface Idempotent

Annotation for selective idempotency protection on Spring MVC controllers or handler methods.

Only controller classes or methods annotated with @Idempotent will be processed by the AvoOnce idempotency filter. Unannotated endpoints bypass idempotency checks and response caching entirely.