I have a stateless session bean with a method that creates a query using the
entity manager. Since the method is read-only I don't want to force a new
transaction so I use the attribute type SUPPORTS. I can't get that to work. I
always get the following stack trace:
javax.persistence.TransactionRequiredException: EntityManager must be access
within a transaction
at
org.jboss.ejb3.entity.ManagedEntityManagerFactory.getSession(ManagedEntityManagerFactory.java:124)
at
org.jboss.ejb3.entity.InjectedEntityManager.getSession(InjectedEntityManager.java:154)
at
org.jboss.ejb3.entity.InjectedEntityManager.createQuery(InjectedEntityManager.java:67)
...
Why is that? Do I always have to have a transaction? Even if the operation is
just read-only?
TIA
Thomas Hallgren
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