1. A method for backing up data computed using an application in a cloud computing environment, said method comprising: modifying the application to register a servlet; publishing the application that was modified to the cloud computing environment; during execution of the application, using the servlet for: detecting annotated entities created in code of the application by parsing user codes; finding out properties and property types of the annotated entities; generating a plurality of structured query language (SQL) statements to query out data to be backed up in accordance with the annotated entities; and publishing the backed up data, wherein at least one of modifying the application, publishing the application, and using the servlet is to be performed using at least one computer.