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Posted to users@tomcat.apache.org by ericp56 <er...@twcable.com> on 2008/07/08 16:58:39 UTC

Configuring OpenJPA, need help

Hello,

I have OpenJPA working on Tomcat 6 using
Persistence.createEntityManagerFactory, which is unmanaged.

Now I'd like to use the managed environment, but I am having a problem with
the JNDI resource.

I am not deploying a WAR, but individual files, so I can't use
META-INF/context.xml (I'm led to believe).

I have placed the resource in CATALINA's context.xml:
	<Resource name="bean/OpenJPAEMF" auth="Container" 
type="org.apache.openjpa.persistence.OpenJPAEntityManagerFactory" 
factory="org.apache.naming.factory.BeanFactory"/>

In my code, I have:
	Context initCtx = new InitialContext();
	emf = (OpenJPAEntityManagerFactory)
initCtx.lookup("java:comp/env/bean/OpenJPAEMF");
which raises:
	java.lang.InstantiationException:
org.apache.openjpa.persistence.OpenJPAEntityManagerFactory
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at
org.apache.naming.factory.BeanFactory.getObjectInstance(BeanFactory.java:143)

I am relatively "green" at this.  Can someone point me in the right
direction?

If that direction is through a 300 page manual, can you provide an example
instead?:blush:

Thanks,

Eric
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RE: Configuring OpenJPA, need help

Posted by ericp56 <er...@twcable.com>.
It looks like java:comp/env/OpenJPAEMF should have worked, although the extra
slash didn't work either.


>From reading some articles, it looks like the following should work:

I'm no longer using the initial context, or web.xml.

context.xml:
	<Resource name="bean/OpenJPAEMF" auth="Container"
	factory="org.apache.openjpa.persistence.OpenJPAEntityManagerFactory"
	type="org.apache.openjpa.persistence.OpenJPAEntityManagerFactory.class" />
my class using JPA:
	@PersistenceUnit(unitName = "CallScheduler")
	private @Resource(name="bean/OpenJPAEMF")OpenJPAEntityManagerFactory emf;
	
	private OpenJPAEntityManager em;

In my functions, emf is still null.
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RE: Configuring OpenJPA, need help

Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: ericp56 [mailto:eric.phetteplace@twcable.com]
> Subject: RE: Configuring OpenJPA, need help
>
> initCtx.lookup("java:comp/env/OpenJPAEMF");

Try "java:/comp/env/OpenJPAEMF".  Note the additional slash.

 - Chuck


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RE: Configuring OpenJPA, need help

Posted by ericp56 <er...@twcable.com>.
How true,

I was creating a JDBC JNDI for an example, and didn't have it configured
properly.  That misled me.

Thanks!

I now have in my META-INF/context.xml file:

<Resource 
	name="OpenJPAEMF" 
	auth="Container" 
	factory="org.apache.openjpa.persistence.OpenJPAEntityManagerFactory"
	type="org.apache.openjpa.persistence.OpenJPAEntityManager"
/>

Now, this code:
	Context initCtx = new InitialContext();
	emf = (OpenJPAEntityManagerFactory)
initCtx.lookup("java:comp/env/OpenJPAEMF");
Causes:
	javax.naming.NameNotFoundException: Name OpenJPAEMF is not bound in this
Context

What am I doing wrong now?  


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RE: Configuring OpenJPA, need help

Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: ericp56 [mailto:eric.phetteplace@twcable.com]
> Subject: Configuring OpenJPA, need help
>
> I am not deploying a WAR, but individual files, so I can't use
> META-INF/context.xml (I'm led to believe).

Not true.  Simply create the META-INF directory under your webapp deployment directory and place the <Context> element in context.xml.  Exactly the same structure as an expanded .war file.

 - Chuck


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