Java 9 Programming By Example

Storing state on the server

The application state should usually not be saved on the client. There may be some special case in addition to the one where you write educational code and want to demonstrate how to do it. Generally, the state of the application related to the actual use is stored in the session object or on some database. This is especially important when the application requests the user to enter a lot of data and does not want the user to lose the work if there is some hiccup in the client computer.

You spend a lot of time selecting the appropriate items in an online shop, choosing the appropriate items that work together, creating a configuration of your new model airplane, and all of a sudden, there is a blackout in your ...