Entries from December 2007

Contextual injection of core domain concepts with Seam

Date December 20, 2007

Update: Pete Muir recently posted an alternative to the example described here for the UserProfile object. It avoids potential LazyInitializationException if you access a property which was not initialized inside the loading conversation since the UserProfile is SESSION scoped. I prefer Pete’s approach to the implementation but the concept is the […]

Posted in JBoss Seam, JSF Comments 2 Comments »

Setting the conversation-timeout in Seam, why it really does work

Date December 13, 2007

Conversation timeout seems to be a commonly misunderstood Seam concept. I often see postings on the Seam forums claiming that the conversation-timeout doesn’t work! Well, actually it does, you simply have to understand the semantics.
Configuring the conversation-timeout period can be accomplished through the following in your components.xml:
<core:manager conversation-timeout=”900000″ />
At first glance most developers relate […]

Posted in JBoss Seam Comments 25 Comments »

Extending query by example through annotation

Date December 4, 2007

Query by example (QBE) is a great feature for easily executing Criteria using Hibernate. By simply filling in an object and submitting it, Hibernate automatically generates the query based on the values set in the object. While this is an attractive option, in my experience it usefulness quickly becomes limited. In many cases, specifying Restrictions […]

Posted in Hibernate, JPA Comments 6 Comments »