software.amazon.lambda.powertools.idempotency

Annotation Type Idempotent

@Retention(value=RUNTIME)
 @Target(value=METHOD)
public @interface Idempotent

@Idempotent is used to signal that the annotated method is idempotent:
Calling this method one or multiple times with the same parameter will always return the same result.
This annotation can be placed on the RequestHandler.handleRequest(Object, Context) method of a Lambda function:

     @Idempotent
     public String handleRequest(String event, Context ctx) {
         // ...
         return something;
     }
 

It can also be placed on another method. In that case you may need to use the @IdempotencyKey