[jboss-user] [jBPM] - Re: Basic API Question

[Diogo Saad]

Diogo Saad [http://community.jboss.org/people/diogosaad] created the discussion

"Re: Basic API Question"

To view the discussion, visit: http://community.jboss.org/message/626293#626293

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I'm trying to follow the path indicated by Demian (save and retrieve information from BAM tables) but I simply can not make persistence work.
I get this exception where I try to excute the following junit test :


                    SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();

  // Construct DataSource
                    JdbcDataSource ds = new org.h2.jdbcx.JdbcDataSource();
                    ds.setURL("jdbc:h2:jdbc/DataSource");
                    ds.setUser("sa");
                    ds.setPassword("sa");
                     builder.bind("jdbc/DataSource", ds);


Environment env = KnowledgeBaseFactory.newEnvironment();
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, Persistence.createEntityManagerFactory("org.jbpm.persistence.jpa"));
env.set( EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager() );
session = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env);


:
+Caused by: java.lang.reflect.InvocationTargetException+
+          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)+
+          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)+
+          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)+
+          at java.lang.reflect.Constructor.newInstance(Constructor.java:513)+
+          at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:116)+
+          ... 33 more+
+Caused by: java.lang.RuntimeException: Could not commit session or rollback+
+          at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:317)+
+          at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:130)+
+          ... 38 more+
+Caused by: java.lang.RuntimeException: Unable to rollback transaction+
+          at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:189)+
+          at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:314)+
+          ... 39 more+
+Caused by: java.lang.NullPointerException+
+          at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:185)+


I have:
1) Created a persistence.xml file under META-INF (attached)
2) 
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