Comments on: Persistence Made Easy with Groovy and JPA

By: Roger Lovelock

Roger Lovelock — Sat, 15 Aug 2009 07:54:05 +0000

Currently a newbie with Groovy, but trying to implement JPA in a test app with Netbeans. I have downloaded the source etc and can run it fine from the command line – but I want to set it up as a Netbeans Project so that I can work in an IDE to make mods etc etc. Have tried all sorts of ways without success – but my impression was that the whole thing started off as a Netbeans Project.
Sort of problem I have is Netbeans looking for a class to run when I try ‘run file’ on the populate script. Any help appreciated!

By: OCTO talks ! » Guicy : un cocktail de Groovy et de Google Guice

OCTO talks ! » Guicy : un cocktail de Groovy et de Google Guice — Fri, 20 Feb 2009 15:42:03 +0000

[...] dans Groovy fonctionne plutôt bien, comme démontré récemment par Romain Guy lorsqu’il integre Groovy et JPA. Je suis sûr qu’avec le support des annotations (un cas unique dans les langages dynamiques [...]

By: Fred Janon

Fred Janon — Wed, 20 Feb 2008 05:49:35 +0000

Thanks for the good work. For the Windows users, the -cp option needs “;” as a separator, not “:” as for Linux. It would be nice if you could include the batch files for Windoz:

populate.bat:
groovy -cp ../lib/derby.jar;../lib/toplink-essentials.jar;. PopulateAddressBook.groovy

query.bat

groovy -cp ../lib/derby.jar;../lib/toplink-essentials.jar;. QueryAddressBook.groovy

Just tried it with Groovy Version: 1.5.4 JVM: 1.6.0_02-b06, the example works great.

By: Rudolf Pfahler

Rudolf Pfahler — Thu, 08 Nov 2007 09:07:29 +0000

Romain gz, good woork. Thats what ive been looking for. It works fine, but if i try it with java-embedded-groovy the class Person cannot be found. Have you any idea?

By: Groovy và database persistence « Khi công việc yêu cầu phải học Java :-)

Groovy và database persistence « Khi công việc yêu cầu phải học Java :-) — Fri, 03 Aug 2007 06:58:51 +0000

[...] Groovy kết hợp với JPA: http://www.curious-creature.org/2007/03/25/persistence-made-easy-with-groovy-and-jpa/ [...]

By: Vadim Voituk

Vadim Voituk — Mon, 07 May 2007 16:33:16 +0000

Thanks for good post.
I’ll recomend it as good intro into power of Groovy for newbies

By: Romain Guy

Romain Guy — Sat, 21 Apr 2007 06:27:34 +0000

IDEs like IntelliJ IDEA will take care of that when you do a refactoring.

By: olak

olak — Fri, 20 Apr 2007 09:55:46 +0000

Hi, nice I agree. I’m working with Hibernate and JPA is nice. But what annoys me a bit is that you have to put in the name of the fields as strings, like you did in your query:

query = “SELECT p FROM Person p WHERE p.firstName = :firstName”)

if you change the name of the property, you have to be certain to change it in these strings as well, would be nice if it was possible to specify the fields directly!

By: Ivan Dolvich

Ivan Dolvich — Wed, 18 Apr 2007 21:18:59 +0000

It’s a very nice example. I’m playing with it now, but I couldn’t make a @OneToMany relationship work. I think I need something like “Set persons” here. Is this possible with Groovy 1.1, since it doesn’t support Generics yet? Greetings, Ivan

By: Romain Guy

Romain Guy — Wed, 11 Apr 2007 04:24:22 +0000

I actually don’t mind that much. Now, I never had to deploy applications at a large scale where size did matter. But when I see the size of most of the apps I download and install, I don’t really care about 1 MB. Especially when I deem it useful to me, and therefore to the user. I am more concerned about libraries that come with hundreds of dependencies (for instance, any Jakarta library :-) like log4j, common-login or even junit.