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Java Persistence with Hibernate
book

Java Persistence with Hibernate

by Gavin King, Christian Bauer
October 2006
Intermediate to advanced content levelIntermediate to advanced
880 pages
22h 11m
English
Manning Publications
Content preview from Java Persistence with Hibernate

16.3. Introducing the Command pattern

The patterns and strategies introduced in the previous sections are perfect if you have to write a small to medium sized web application with Hibernate and Java Persistence. The OSIV pattern works in any two-tiered architecture, where the presentation, business, and persistence layers are colocated on the same virtual machine.

However, as soon as you introduce a third tier and move the presentation layer to a separate virtual machine, the current persistence context can't be held open anymore until the view has been rendered. This is typically the case in three-tiered EJB application, or in an architecture with a rich client in a separate process.

If the presentation layer runs in a different process, you ...

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