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How to configured the PersistenceManager for Bean Managed Transactions?
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ebenzacar@...
I'm trying to integrate DN (JDO) into my JEE application via the JCA adapter, and configure the Persistence manager to understand BeanManagedTransactions. I am retrofitting this into existing code (formerly using Kodo), and am having difficulties getting the configuration correct.
In my `persistence.xml` file, I have defined my PU as follows: <persistence-unit name="pu">
<jta-data-source>java:jboss/datasources/POC_DN</jta-data-source>
<properties>
<property name="datanucleus.connection.resourceType" value="JTA"/>
<property name="datanucleus.transaction.type" value="JTA"/>
<property name="datanucleus.storeManagerType" value="rdbms"/>
<property name="datanucleus.schema.autoCreateAll" value="false"/>
<property name="datanucleus.ConnectionFactoryName" value="java:jboss/datasources/POC_DN"/>
<property name="datanucleus.connectionPoolingType" value="dbcp2-builtin"/>
<property name="javax.persistence.jta-data-source" value="java:jboss/datasources/POC_DN"/>
<property name="datanucleus.jtaLocator" value="jboss"/>
</properties>
</persistence-unit>
In my Bean code, I my bean is defined as a: @TransactionManagement(TransactionManagementType.BEAN) Finally, in my actual code, I am retrieving the persistence manager from the JNDI and getting the transaction from it (where jndiName is the name of my connection-definition defined in the container) PersistenceManagerFactory pmf = (PersistenceManagerFactory) context.lookup(jndiName);
pm = pmf.getPersistenceManager(); pm.currentTransaction.begin(); ... ... pm.currentTransaction.commit(); However, in doing so, I get error messages that I cannot begin a transaction that has already started. If I omit the begin(), then I get an error message that "IJ031019: You cannot commit during a managed transaction". In both circumstances, it is clear to me that the PM does not understand that I want to use BeanManagedTransactions. Is there a special configuration that I need to use? Is retrieving the PM from the JNDI explicitly like this causing my issues? How else can I access the Tx statically? Am I forced/required to retrieve the `java:jboss/UserTransaction` from the JNDI instead? Thanks for any insight/tips. Eric |
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ebenzacar@...
As a followup question, does the JCA adapter support anything other than XATransactions? Eric |
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https://www.datanucleus.org/products/accessplatform_5_2/jdo/persistence.html#jboss7 says that "DataNucleus JCA adapter supports both Local and XA transaction types".
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