Grokking Spring Boot
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Aspects and Pointcuts

@Before("bookingCalls() && args(email, request)")
public void before(String email, Object request) {
    log.info("before: {} asks for {}", email, request);
}

When a test called BookingService.book for Ana, the log showed this line before the method body ran.

before: ana@example.com asks for BookingRequest[eventId=7, seatLabel=A12]

BookingService contains no logging call, and nothing in BookingService refers to the method above. The line appeared because Spring placed a proxy in front of BookingService and ran this method on the way in

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