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

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 -------------------------------------------------------------- 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)  -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/626293#626293] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]