A Grails 1.0.4 Gotcha

{ Dan Stieglitz // Groovy/Grails // December 29, 2008 }

Experiencing lots of unexplained, frustrating LazyInitializationExceptions in your Grails application lately? It could be due to a gotcha I was wrestling with that’s present even through Grails 1.0.4. Fixing it will likely take some time as it will require some rethinking and probably some refactoring of the core Grails framework but there is a workaround, once you figure out you’ve run into this gotcha.

The symptom is that you get a LazyInitializationException when you don’t expect one (well, you never really expect them) but even if you’re an experienced Hibernate developer this might throw you for a loop. The problem is that the Grails OSIV filter will have closed the Hibernate “currentSession” by the time the SiteMesh template is processed, so ANY calls to GORM dynamic methods will through this exception if you’re accessing lazy-initialized fields from your domain objects.

The solution is to remove all Hibernate calls, including those in tag libraries, from your SiteMesh templates. Or, if you must have the aforementioned calls, you can modify your tag libraries (since I know everyone is using tag libraries instead of just mashing code into your GSPs within <% %> brackets, right?) in a manner similar to this:

    def isReseller = { attrs, body ->


        if (authenticateService.userDomain()) {


        def u = Person.createCriteria();


        def user = u.get {


             eq("id",authenticateService.userDomain().id)


             fetchMode(’primaryAccount’,FM.EAGER)


             fetchMode(’primaryAccount.type’,FM.EAGER)


             }


         }


    }

The above code assumes you’re using the Spring Security plugin (aka ACEGI) and want to check for a specific account type for the logged-in user when rendering your SiteMesh layout. It will eagerly fetch the primaryAccount and primaryAccount.type objects (they are 1-to-1 references in this example) when retrieving the account, so no session is required once the call is finished.

Hopefully I saved you some hours here… you can see the JIRA entry for this at http://jira.codehaus.org/browse/GRAILS-2764.

Happy holidays to all, and here’s to a prosperous 2009. If you’ve been hit hard by the financial crisis, I hope that it doesn’t last long. Once again we are reminded that “what goes up must come down,” and also that greed and stupidity are a bad combination… especially for financiers and their financial-industry colleagues.

68 comments

Another solution:
http://www.jtict.com/blog/grails-existing-hibernate-dao/

Posted by J on 12/30 at 03:03 PM

hey its a well written post and being a professional i really like this actually i was searching this kind of 642-061 exam information and now found it here on this nice site you have done a nice work and i also checked the link its very useful.. these days i am busy in my professional 642-066 exam classes and will come after that for more discussion..

Posted by on 09/28 at 05:12 AM

The problem is that the Grails OSIV filter will have closed the Hibernate “currentSession” by the time the SiteMesh template is processed, so ANY calls to GORM dynamic methods will through this exception if you’re accessing lazy-initialized fields from your domain objects.

Posted by www.poker-virtuel.fr/ on 11/25 at 05:26 AM

ere ekad xxx video mkpcpb natural penis enlargement pill usyjxd black porn arhjizju male penis enhancement zgahsrcfs babes joitibctp

Posted by xxx videos on 05/27 at 03:18 PM

nice post like this this subject is very nice chose by writer thanks to give info and thanks to site admin and writer

Posted by penis enlargement on 06/23 at 06:45 AM

It is great that people can receive the home loans and it opens completely new possibilities.

Posted by WADETwila on 10/02 at 12:20 AM

That is well known that the supreme essay editing service can furnish people with good term paper. Furthermore, smart people will be able to save time.

Posted by VillarrealOlive on 10/06 at 11:17 PM

Some teachers like to examine the writing skills, thus, we must select dissertation service to buy dissertation meaning. In this way you affirm the writing technique. And also you could take thesis.

Posted by Helena23Jackson on 10/08 at 06:47 AM

Thank you a lot, because you give facts about this good post . Buy essay or essay for sale if want get know much more!

Posted by TARAOchoa24 on 10/08 at 04:31 PM

Buying your papers usually utilize plagiarism check. It will protect your reputation!

Posted by RothASHLEY29 on 10/13 at 02:43 AM

Any path you decide upon, there is every time someone to tell you that you are amiss. There are always difficulties come up which entice you to believe that your critics are correct. But our service will assist you at anytime to write your essay. I notify youthesis writing service that will help you in your university life. We will assist you to arise and become a useful student!

Posted by LEANNE24Lara on 10/15 at 11:27 AM

The experienced thesis service should trade their dissertation references just about this topic, therefore, some people determine the professional dissertation writing service and buy a dissertation right there.

Posted by Francine32Gentry on 10/15 at 11:28 AM

Thank you, it’s very amazing description it might be very obliging for students. For example last year when I had a difficult of time at the end of semester with a constant flow of academic assignments and drill, I had a brilliant idea to buy it somewhere and than use plagiarism checker. I was so exhausted that I did not care for what can appear when my academic work was written by different person. To my greatest surprise, research paper was estimable the price I paid for it. I was so charmed with the quality and now everytime i use this service.

Posted by CelesteSoto20 on 10/22 at 03:03 PM

A well-written article! Very prime to be honest! I received my essay papers was really impressed with essay writing service! I read it and could not have done a better custom term paper. I have received my grade on it, and naturally it was truly well educated.

Posted by Lois20Ayala on 11/03 at 09:26 AM

I’ve received my custom essay from the uk essays online service. Moreover, these writers amazed me, because the quality of my paper was solid.

Posted by Jennings24Tania on 11/04 at 11:03 AM

Super post there! Comprehensive and well collated material. Thanks for sharing.
<a href="http://www.adagiointeriors.com/">Canvas Prints</a

Posted by on 11/24 at 11:00 AM

I can’t believe how much of this I just wasn’t aware of. Thank you for bringing moreinformation to this topic for me. I’m truly grateful and really impressed.
celebrity lace wigs

Posted by dress on 11/30 at 01:47 AM

Tiffany & Co. Necklaces, Pendants, Bracelets, Earrings, Rings and Accessories，being lot of women favorite goods.
Wearing tiffany
tiffany tiffanydfged

Posted by on 12/02 at 06:58 AM

your post is good. . let me tell u one thing that Blogs have become latest and important source of quality free information on net people enjoying for hours together. . .nice job keep sharing
UK Dissertation Help
UK Coursework Help

Posted by Dissertations Writing Services on 12/08 at 11:38 AM

I can’t believe how much of this I just wasn’t aware of. Thank you for bringing moreinformation to this topic for me. I’m truly grateful and really impressedcosplayfu

Posted by cosplay on 12/16 at 08:51 PM

To opt for the professional purchase essay service would be a great way out for university students, who’re embarrassed because of the research papers completing.

Posted by Justine25Huffman on 12/17 at 03:33 AM

You have a great and informative article here. It was well written and I love the way how you simplify things regarding how to fix problems in the Grails application. Hope this helps a lot of people.

Posted by Jordan on 01/19 at 04:24 AM

For the XP/Server 2003 era, even the requirements of premier certifications like M.C.S.E., M.C.D.B.A., M.C.S.D., etc. were removed. C.E.C.’s and training requirements were removed in toto. Only an annual fee was required to be paid to maintain M.C.T. M.C.D.S.T.’s could also be certified as a trainer. Today an M.C.T. can be certified in only office applications and hold the trainer certification title.
====================================================
642-974 dumps | 640-863 dumps | 642-436 dumps | 70-646 dumps | 70-432 dumps

Posted by on 02/11 at 01:49 AM

I was searching for crucial information on this subject. The details was important as I’m about to launch my very own portal. Many thanks for providing a missing link in my business.
curt
nike potter

Posted by on 02/11 at 09:15 AM

Thanks for taking the time to discuss this, I feel strongly about it and love learning more on this topic. If possible, as you gain expertise, would you mind updating your blog with more information? It is extremely helpful for me..

Posted by esay writers on 03/13 at 08:23 AM

Add your own comment below.