After some debugging I found the cause of the problem my self. In
components.xml you need to configure managed-persistence-context and also in
persistence.xml you need to set jboss.entity.manager.factory.jndi.name
property for your database.
I try to learn seam from the hotel booking
Reference Manual wrote : The Seam Application Framework only works with
Seam-managed persistence contexts. By default, the components will look for a
persistence context named entityManager.
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That sentence make sense now after all the trouble I have been through.
However, for a beginner, that sentence alone probably will not have much help
initially. It would be more helpful if it states that you have to this and that
or refer to the corresponding sections. Otherwise its become
I updated the SeamProblemsFAQ to cover this in more depth - a more suitable
place I think.
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Show your components.xml
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You've got an NPE in you own code. Fix it. At least show the code that gives
the NPE!
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Here is the code
| public class FooHome extends EntityHomeFoo {
| @In EntityManage em
| @Transactional
| public String persist() {
| getEntityManager().joinTransaction();
| getEntityManager().persist( getInstance() );
| getEntityManager().flush();
|
