jpa named query not found - jpa

Question

I am migrating an ejb 2 application to ejb 3.1. Both technologies will have to coexist for a while. One of my entity beans looks like this:
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
#Entity
#Table(name = "migracao_jsf")
#NamedQueries({
#NamedQuery(name = "migracao_query", query = "select p from MigracaoJsf p")
})
public class MigracaoJsf implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Column(name = "name")
#Id
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
On the deployment logs in jboss 6.1 I can see that the entity was deployed.
[AnnotationBinder] Binding entity from annotated class: myclass.MigracaoJsf
But I can't find the log for the query parsing. And when I try to call it I get a query not found exception. Why is the entity deployed correctly and the query not parsed?
Thanks
Kelly

Answer 1

You should be able to call the query using the following code:
EntityManager em;
// em is created sonehow
TypedQuery<MigracaoJsf> q = em.createNamedQuery("migracao_query", MigracaoJsf.class);
Also it is common practice to prefix the named queries with the class name since query names must be unique. Thus a query to get an entity by its name should be named Entity.GetByName.