[wildfly-dev] How to deal with resource refs when deploying JPA container managed entity managers (WFLY-2841)

[Jason Greene]

On Jan 31, 2014, at 8:33 AM, Martin Andersson <martin.andersson at purplescout.se> wrote:

> I agree. I don't think mapping a datasource in jboss-web.xml is such an exotic use case. I should just work.

It’s not, it’s actually implied by the standard, as you can define them in web.xml as well. It’s a lifecycle problem we need to solve. 

> Also, there is no hint anywere that there is a property you can set to make it work.
> 
> The proprietary jboss namespace is not an option since I want to be vendor neutral, but ear/java:app is definitely an option.

Another solution specific to EE7 is you can leave the jta-data-source undefined in persistence.xml which will use the platforms default data source. We allow you to point that anywhere. However, that limits you to one, so not really a complete solution.

A more complete solution is to use a common global name, and define an alias to your deployment in our naming subsystem like so:

<bindings>
   <lookup name="java:global/env/FooDS" lookup="java:jboss/datasources/ExampleDS"/>
</bindings>

--
Jason T. Greene
WildFly Lead / JBoss EAP Platform Architect
JBoss, a division of Red Hat