Comments on: New features of Hibernate 3.0

By: Robert Watkins

Robert Watkins — Tue, 12 Apr 2005 14:47:44 +0000

The feature I want to play with the most is the query stats; being able to identify the HSQL that’s causing long running queries will be a big step up from having to decrypt the generated SQL inside the database.

By: Michael

Michael — Tue, 12 Apr 2005 13:27:45 +0000

I have used Enhydra Octopus for DB -> XML and basic ETL before, so the hibernate advantage didn’t really jump out at me, but I am sure people will come up with interesting uses of it !

Overall, am very excited about Hibernate 3 ! (more so then I should be about an obscure library that I was trying to explain to my wife what it does).

By: Michael

Michael — Tue, 12 Apr 2005 13:25:49 +0000

Ah yeah the apache “internet://**/*.jar” build process they must use (I always use it as an example of kitchen sink jar-ing – its almost like they get away with breaking the rule but no one else does).

I trust that ANTLR is backwards compatible anyway… but it is effectively patching weblogic.

By: Robert Watkins

Robert Watkins — Tue, 12 Apr 2005 12:03:03 +0000

Michael,

The issue with WebLogic is that BEA include an old version of ANTLR inside the “kitchen-sink” weblogic.jar. You need to override it by placing the right ANTLR jar file on the classpath _before_ weblogic.jar

The XML support has some interesting use cases, primarily when you want the output in an XML form sooner or later anyway. Web services spring to mind, as do some other query or reporting scenarios (essentially those where you don’t have domain logic to worry about). It also provides a good mechanism for doing extract/transform/load type operations (such as populating your database with test data!)

Jeremy:

When you use the hand-written SQL, you can call stored procedures. One catch is that you need to make sure the parameters of the stored procedure match the order that Hibernate expects (i.e. the order they occur in the mapping file)

By: Jem Mawson

Jem Mawson — Tue, 12 Apr 2005 09:12:46 +0000

Nice one Robert. If only the Victorian chapter would be as active as QLD.

One of the limiting features of prior Hibernate releases was its lack of support for stored procedures. Do you know if this has been changed?

Jem

By: Michael

Michael — Tue, 12 Apr 2005 09:10:31 +0000

Thanks for the slides Robert, wish I could have been there (wife sick, and I didn’t think bringing along a loud 2 year old would have been good form).

The “filtering” feature is awesome. I can think of several cases where that would have been a god send in the past ! (it is one of those things you don’t know you need until you need it !).

Not sure about the XML support – is this deviating from the main mission of hibernate? (Gavin seems to have the resources now anyway).

What is the issue with ANTLR HSQL parsing and weblogic if I may ask?