users@glassfish.java.net

Re: one persistence unit for few EJB modules in one EAR

From: Sahoo <sahoo_at_Sun.COM>
Date: Mon, 19 Jan 2009 22:44:08 +0530

This packaging is explained at
http://weblogs.java.net/blog/ss141213/archive/2005/12/using_java_pers.html

Sahoo wrote:
> Put your entity.jar containing persistence.xml in ear/lib directory.
>
> Witold Szczerba wrote:
>> Hi there,
>> can you, please, tell me how should I package my EAR file with one,
>> two or more EJB modules in a way that every EJB module could share one
>> persistence unit? I was trying different things, so please spare me
>> describing what I tried and did not work. Right now all I can get is
>> to put persistence.xml file inside one of EJB module. But that module
>> is the only one where I can inject EntityManager.
>> As soon as I move persistence.xml from within EJB-JAR somewhere else,
>> I cannot deploy EAR, because session beans of that EJB-EAR cannot find
>> persistence unit anymore.
>>
>> This is what I get when deploying:
>>
>> Exception occured in J2EEC Phase
>> com.sun.enterprise.deployment.backend.IASDeploymentException: Could
>> not resolve a persistence unit corresponding to the
>> persistence-context-ref-name
>> [pl.ibpolsoft.netbroker.core.services.DummyEJBBean/em] in the scope of
>> the module called
>> [gfdeploy#/home/witoldsz/NetBeansProjects/netBroker/netBroker-ear/dist/gfdeploy/netBroker-ejb_jar].
>>
>> Please verify your application.
>>
>> The bottom line is I would like to be able to make my application
>> (EAR) of several EJB modules, so they would be able to communicate
>> using local interfaces and share one persistence unit. Can you tell me
>> how exactly should my EAR and EJBs look like?
>>
>> Thanks,
>> Witold Szczerba
>>
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>