EntityManager in AbstractResource throws not mapped exception

[kmranganathan]

Hi,
I have developed a simple and complete seam application. Now, I am attempting to integrate the JasperReports reports into the application. I have developed the reports with EJBQL.
Now, when integrating them, I use an AbstractResource. In the abstract resource:

1) Get the EntityManager by

EntityManager entityManager = (EntityManager)(Component.getInstance("entityManager"));

2) Use the EntityManager to execute a query like "Select exam from EXAM exam"

When I run this, I get QuerySyntaxException saying "EXAM is not mapped".

This Exam component is working fine in the normal part of the Seam application (i.e seam-generated part).

Ranga.

[kmranganathan]

Hi,
Is no one facing this issue?

Ranga.

[kmranganathan]

I need some help on this issue, pleae.

Ranga.

[perez83]

use

managed-persistence-context
@PersistenceContext
Entitymanager entitymanager;

in compenents.xml
you must add

<persistence:managed-persistence-context auto-create="true"
name="entityManager"
persistence-unit-jndi-name="java:/NameEntityManagerFactory" />


or

Seam-managed persistence context

@In (create=true)  EntityManager entityManager;

in compenents.xml
you must add

<component name="em"
          class="org.jboss.seam.persistence.ManagedPersistenceContext">
    <property name="persistenceUnitJndiName">java:/NameEntityManagerFactory</property>
</component> 

and in persistance.xml you must add

<property name="jboss.entity.manager.factory.jndi.name" value="java:/NameEntityManagerFactory"/>

[kmranganathan]

Hi,
I resolved the issue. It was a silly error of having everything in upper case. Thanks for your replies.

However, now I am facing another issue. I am trying to access a file from the AbstractResource (actually a compiled report). JBoss throws access denied error. the exception trace shows a NP exception.
How do I access an abstract resource...I tried accessing through getServletContext().getResourcePath()...

Thanks,
Ranga