Chapter 3. Persistence pays off
This chapter covers
- The benefits of JDBC and JPA, and why they won’t work in an OSGi environment without help
- How enterprise OSGi and the Apache Aries extensions restore a lovely programming model
- How to read and write from a database in your sample application
- How to use transactions for cleanup when things go wrong
Just as it needs a frontend, every enterprise application needs a backend. For many business applications the heart of the backend is persistence—either read-only access to a directory service, or a full read–write relational data mine, or something in between. This chapter explains how to use persistence and transactions in an enterprise OSGi environment.
Let’s start with a reminder of the ...
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