[rules-users] Exception using persistence

[PAYET, Manuel]

It's probably that your transaction manager, for an odd reason, doesn't bind with the good name;
You can do the following workaround:

Final InitialContext initContext = new InitialContext();
initContext.bind("java:comp/UserTransaction",initContext.lookup("comp/UserTransaction"));

And voila, those two jndi name should point to the same object.

I stress the fact that what I've written hasn't been tested.

-----Message d'origine-----
De : rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] De la part de Robert
Envoyé : lundi 7 juin 2010 16:16
À : rules-users at lists.jboss.org; Mark Proctor
Objet : Re: [rules-users] Exception using persistence

Hi,

still struggling with this one (see below),

but I did a slide change in the test-code

     try {
       val env = new java.util.Hashtable[String, String]
       env.put(Context.INITIAL_CONTEXT_FACTORY,
"bitronix.tm.jndi.BitronixInitialContextFactory")
       val ctx = new InitialContext(env)
       val ut1 : UserTransaction = (ctx.lookup( "java:comp/UserTransaction")).asInstanceOf[UserTransaction]
     } catch {
       case ex: Exception => ex.printStackTrace()
     }

(Sorry, code is in Scala, but should not be a problem to read it).

Instead of "java:comp/UserTransaction" (as written in the docs) I wrote "comp/UserTransaction" and it works.

But since this is some test-code and I am able to do the look-up as I want ("comp/UserTransaction"), as soon as I use


JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env )


I have no influence anymore (its drools-code ;-) and it looks like its using internally "java:comp/UserTransaction".


Is there any way to change this (setting it) ?

Cheers, Rob



Am 01.06.2010, 23:54 Uhr, schrieb Robert <robert.weissmann at web.de>:

> Well, I tried this but it does not work.
>
> Checking additionally the BitronixInitialContextFactory API where it
> says:
>
> ---------------------------------------------
> "Implementation of InitialContextFactory that allows lookup of 
> transaction manager and registered resources.
>
> The easiest way to use this provider is to create a jndi.properties 
> file in your classpath with this content:
> java.naming.factory.initial=bitronix.tm.jndi.BitronixInitialContextFac
> tory Alternatively, you can create a InitialContext object with an 
> environment pointing to this class:
>   Hashtable env = new Hashtable();
>   env.put(Context.INITIAL_CONTEXT_FACTORY,
> "bitronix.tm.jndi.BitronixInitialContextFactory");
>   Context ctx = new InitialContext(env);
>
> The transaction manager can be looked up at the standard URL 
> java:comp/UserTransaction while resources can be looked up using their 
> unique name as set in ResourceBean.getUniqueName(). "
> ---------------------------------------------
>
>
> So, I tried the following ( Its in Scala, but shouldn't be a problem 
> to
> read):
>
>    try {
>      val env = new java.util.Hashtable[String, String]
>      env.put(Context.INITIAL_CONTEXT_FACTORY,
> "bitronix.tm.jndi.BitronixInitialContextFactory");
>      val ctx = new InitialContext(env);
>      val ut1 : UserTransaction = (ctx.lookup( "java:comp/UserTransaction"
> )).asInstanceOf[UserTransaction]
>    } catch {
>      case ex: Exception => ex.printStackTrace()
>    }
>
>
> But still getting the same problem as before at line   "val ut1 : ...".
>
> What I do not get is that the Bitronix API says that the standard URL 
> is "java:comp/UserTransaction", but its somehow not found !?!?!?
>
> Any ideas ?
>
> Cheers, Rob.
>
>
>
> Am 31.05.2010, 02:54 Uhr, schrieb Mark Proctor <mproctor at codehaus.org>:
>
>> On 30/05/2010 20:28, Robert wrote:
>>> Hi, I followed the instructions on setting up the persistence in the 
>>> drools flow doc, but I get the following exception:
>>>
>>>
>>> Exception in thread "main" java.lang.RuntimeException: Could not 
>>> commit session
>>> 	at
>>> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:133)
>>> 	at
>>> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.newStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:44)
>>> 	at
>>> org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:93)
>>> 	at
>>> com.rob.server.core.process.drools.tasks.DroolsProcessHandler.<init>(DroolsProcessHandler.scala:130)
>>> 	at
>>> com.rob.server.core.process.drools.tasks.StartDroolsProcessHandler$.main(DroolsProcessHandler.scala:33)
>>> 	at
>>> com.rob.server.core.process.drools.tasks.StartDroolsProcessHandler.m
>>> ain(DroolsProcessHandler.scala) Caused by: 
>>> javax.naming.NameNotFoundException; remaining name 'UserTransaction'
>>> 	at org.eclipse.jetty.jndi.NamingContext.lookup(NamingContext.java:576)
>>> 	at org.eclipse.jetty.jndi.NamingContext.lookup(NamingContext.java:663)
>>> 	at org.eclipse.jetty.jndi.NamingContext.lookup(NamingContext.java:678)
>>> 	at
>>> org.eclipse.jetty.jndi.java.javaRootURLContext.lookup(javaRootURLContext.java:110)
>>> 	at javax.naming.InitialContext.lookup(InitialContext.java:392)
>>> 	at
>>> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:109)
>>> 	... 5 more
>>>
>>>
>>> I have no idea what this means. I guess SingleSessionCommandService 
>>> is looking up for "UserTransaction", but whats the "UserTransaction" ?
>>>
>> You need to configure JTA and JNDI, it uses the standard JNDI lookup 
>> mechanism to find the UserTransaction it's to be associated with. See 
>> javadocs example here:
>> http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifac
>> t/trunk/target/javadocs/stable/drools-api/org/drools/persistence/jpa/
>> JPAKnowledgeService.html
>>
>> Each transaction framework has a different way to be configured, some 
>> are simpler than others.
>>
>> Mark
>>> Cheers, Rob.
>>>
>>>
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>
>


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