Do you find yourself repeating the same code fragments in your application layer over and over again? Get request, authorize user, validate request , maybe push to audit log, perform some operations, catch exceptions, log them, then commit/rollback transaction – all of these repeated in 90% of your application layer methods? Anyway, it is a case for me. Repeating such things is basically waste of time, money, energy and it is error/mistake prone, especially if performed by many developer...