jpa - How to start Transaction in JTA EntityManager -


i have jpa mapping hsqldb , persistence.xml reads below : 

<persistence-unit name="hmc">     <jta-data-source>java:hmc</jta-data-source>     <class>org.hmc.jpa.models.bloodgroup</class>     <class>org.hmc.jpa.models.contactinfo</class>     <properties>         <property name=hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.jbosstransactionmanagerlookup"/>         <property name="hibernate.dialect" value="org.hibernate.dialect.hsqldialect" />     </properties> </persistence-unit>

and entitymanager : entmanagerfactory = persistence.createentitymanagerfactory("hmc");

i have datasource defined in jboss5.1 hsqldb. if begin transaction, throws illegalstateexception : jta entitymanager cannot use gettransaction()

can let me know how start , commit transactions under these circumstances.

regards,

satya

this javadocs gettransaction says...

entitytransaction gettransaction()

return resource-level entitytransaction object. entitytransaction instance may used serially begin , commit multiple transactions.  returns:     entitytransaction instance  throws:     illegalstateexception - if invoked on jta entity manager

so means if transaction-type attribute jta jdbc xa datasource, you'd illegalstateexception.

suggested fix: try set transaction-type resource-local localtx jdbc datasource or else lead illegalstateexception.


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