Chapter 7. Data Storage and Retrieval
In the previous two chapters, we built a small and somewhat useful application for storing notes, and then made it work on mobile devices. While the application works reasonably well, it doesn't store those notes anywhere for long-term storage, which means the notes are lost when you stop the server. Further, if you run multiple instances of Notes, each instance has its own set of notes; this makes it difficult to scale the application to serve lots of users.
The typical next step in such an application is to introduce a database tier. Databases provide long-term reliable storage, while enabling easy sharing of data between multiple application instances.
In this chapter, we will look at database support in ...
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