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JBOSS AS7 7.1.1 - Entity not persisted and createNamedQuery fire exception

.xsd"> <persistence-unit name="guest-pu" transaction-type="JTA">      <description>ObjectDB Persistence Unit</description>       ... ;   </properties> </persistence-unit> </persistence>  

javax.persistence.Embedded

javax.persistence ... ) Specifies a persistent field or property ... must be annotated as persistence">

javax.persistence.TransactionRequiredException

javax.persistence ... /PersistenceException" title="Exception in javax.persistence">javax.persistence.PersistenceException javax.persistence.TransactionRequiredException

javax.persistence.spi.PersistenceProviderResolver

javax.persistence.spi ... class="description"> Determine the list of persistence providers available in the runtime ... javax.persistence.spi">PersistenceProvider

persist(entity)

.persistence">javax.persistence.EntityManagervoid persist(  Object entity) Make an instance managed and persistent ... .persistence">EntityExistsException - if the entity already exists

javax.persistence.EmbeddedId

javax.persistence ... ) Applied to a persistent field or ... ="Annotation in javax.persistence">Embeddable . There must be only one

javax.persistence.ElementCollection

javax.persistence ... /FetchType" title="Enum in javax.persistence">FetchType persistence.ElementCollection">fetch

javax.persistence.MapKeyEnumerated

javax.persistence ... ="Annotation in javax.persistence">ElementCollection persistence">OneToMany

javax.persistence.Temporal

javax.persistence ... for persistent fields or properties of type java.util.Date and java.util ... " title="Annotation in javax.persistence">Basic annotation, the

javax.persistence.MapKey

javax.persistence ... of type java.util.Map when the map key is itself the primary key or a persistent field or property of the entity that is the value of the map. If a persistent field or