Chapter 9. Seam-managed persistence and transactions · Seam in Action_小百科

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Handling the persistence context properly

Bootstrapping Java persistence in Seam

Applying a multifaceted transaction strategy

Implementing an application transaction

Most web frameworks remain agnostic of persistence rather than recognize it as vital to the overall state of the application. Stateless architectures, especially, have depleted the persistence manager of its true value—to monitor a set of managed entities and transparently migrate changes made to them to the database. Seam seeks to restore Java persistence (i.e., ORM) to its full potential by recognizing it as a core part of the application. In addition to adeptly managing the persistence context, Seam ensures that a transaction is always active, commits the transaction when appropriate, and broadcasts transaction synchronization events to improve transparency of persistence operations. In the previous chapter, you learned the fundamentals of Java persistence and how persistence is used both inside and out of a Java EE container. In this chapter, you’ll discover how Seam’s involvement with transactions and persistence helps make these services truly manageable.

9.1. Getting persistence context management right

9.2. Enhancing the capabilities of the persistence manager

9.3. Setting up a persistence unit in Seam

9.4. Seam’s transaction support

9.5. Summary

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