Re: GuiceFilter PersistFilter in web application

[Moandji Ezana]

Are you also using @Transactional? That can cause a UnitOfWork to begin twice.

Mwanji

On May 31, 2013 6:04 PM, "Hui Ouyang" <houy...@gmail.com> wrote:

Hi,
I am using Guice + JPA+ Hibernate for web application running within Jboss.
1. per http://google-guice.googlecode.com/git/javadoc/com/google/inject/persist/PersistFilter.html

I did the following to register PersistFilter in my service module, which extends from ServletModule 

    	         install(new JpaPersistModule(PERSITENCE_UNIT_NAME)); 
		filter("/*").through(PersistFilter.class);
2. per http://google-guice.googlecode.com/git/javadoc/com/google/inject/servlet/GuiceFilter.html, I added the guiceFilter to my web.xml


 Buy I got the following error when starting Jboss
[[/]] Exception starting filter guiceFilter: java.lang.IllegalStateException: Persistence service was already initialized.]
If I remove "filter("/*").through(PersistFilter.class);" then it works fine. The reason I added this is to make sure it is work per request.


What is the right way to achieve the goal for work per request? I notice that there is one JpaPersistModule but do not use it. Should it be used together with PersistFilter?


Thx.

Hui

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[Stephan Classen]

You are calling PersistService.start() somewhere in your code.
If you are using the PersistFilter you must not call PersistService.start() yourselves because it is called by the PersistFilter.