[rules-users] Exception using persistence

[Robert]

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.BitronixInitialContextFactory
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.main(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/artifact/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


-- 
Erstellt mit Operas revolutionärem E-Mail-Modul: http://www.opera.com/mail/