How to pass PersistenceUnit name at run time

[yogesharora]

HI All,
I want to enject entitymanager based on persistence unit name passed at runtime. Can any body tell how to do it.
For Ex:
@PersistenceUnit(name="xyz")
EntityManager em;

I want name to be populated at run time. (In above scenario it is hardcoded "xyz").

[alrubinger]

Annotation metadata must be available to the compiler, so it is impossible to inject this way if you depend upon a runtime value.

If you're not using bleeding-edge builds (ie. trunk), you may instead look up the EMF or EM in JNDI if you opt to bind them there:

http://docs.jboss.org/ejb3/app-server/tutorial/jndibinding/jndi.html

S,
ALR

[mnrz]

"ALRubinger" wrote:
Annotation metadata must be available to the compiler, so it is impossible to inject this way if you depend upon a runtime value.

If you're not using bleeding-edge builds (ie. trunk), you may instead look up the EMF or EM in JNDI if you opt to bind them there:

http://docs.jboss.org/ejb3/app-server/tutorial/jndibinding/jndi.html

S,
ALR

Hi
this solution works in JBoss only, is there any other way so the application becomes portable across the App servers.

would you have a look at my topic?
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=144560&start=0&postdays=postDays&postorder=postOrder&highlight=highlight

thanks

[alrubinger]

Replied at http://www.jboss.com/index.html?module=bb&op=viewtopic&t=144560.

We'll continue discussion there.

S,
ALR