Why entitymanager is null???

[kdcosta.mail.dcosta.gmail.com]

hi

I am entirely new to seam framework.

I have imported a seam project into my workspace created in another machine.and also the database is in that system only.so the connection string ,system name is given rather than localhost.

when in my class in used @PresistanceContext to get the entity manager.
But what ever the query be i am getting a null pointer exception.
So i tried to print what the entitiy manager is.So its getting printed as null.
Why is it so???

Below are the code

@Scope(ScopeType.SESSION)
@Stateless   
public class CompanyManager implements IFCompanyManager {

     public Company m_Company;
     public UserManager m_UserManager;

     @PersistenceContext
     EntityManager em;
     
     
     public CompanyManager(){

     }

     @In
     Company company;
     

     /**
      * 
      * @param CompanyDetails
      * @param SuperUserName
      * @param SuperUserEmail
      * @param Login
      */
     public Status RegisterCompany(IFCompany CompanyDetails, String SuperUserName, String SuperUserEmail, String Login){
          try {
               System.out.println("inside reg button in manager");
               
                              
          
               List existing = em.createQuery("select u.companyId from Company u").getResultList();
          
          } catch (Exception e) {
               System.out.println("inside catch");
               e.printStackTrace();
          }
          
          return Status.SUCCESS;
     }

Components.xml

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
            xmlns:core="http://jboss.com/products/seam/core"
            xmlns:drools="http://jboss.com/products/seam/drools"
            xmlns:security="http://jboss.com/products/seam/security"
            xmlns:mail="http://jboss.com/products/seam/mail"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation=
                "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-1.2.xsd 
                 http://jboss.com/products/seam/drools http://jboss.com/products/seam/drools-1.2.xsd
                 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-1.2.xsd
                 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-1.2.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-1.2.xsd">

   <core:init debug="true" jndi-pattern="@jndiPattern@"/>
     
   <core:manager concurrent-request-timeout="500" 
                 conversation-timeout="120000" 
                 conversation-id-parameter="cid" 
                 conversation-is-long-running-parameter="clr"/>
    
   <core:managed-persistence-context name="entityManager"
                              auto-create="true"
               persistence-unit-jndi-name="java:/AWBEntityManagerFactory"/>
               
   <core:ejb installed="@embeddedEjb@"/>
   
   <drools:rule-base name="securityRules">
       <drools:rule-files>
           <value>/security.drl</value>
       </drools:rule-files>
   </drools:rule-base>

   <security:identity authenticate-method="#{authenticator.authenticate}"
                           security-rules="#{securityRules}"/>
   
   <event type="org.jboss.seam.notLoggedIn">
       <action expression="#{redirect.captureCurrentView}"/>
   </event>
   <event type="org.jboss.seam.postAuthenticate">
       <action expression="#{redirect.returnToCapturedView}"/>
   </event>
   
   <mail:mail-session host="localhost" port="2525" username="test" password="test" />
        
   <!-- For use with jBPM pageflow or process management -->
   <!--  
   <core:jbpm>
      <core:process-definitions></core:process-definitions>
      <core:pageflow-definitions></core:pageflow-definitions>
   </core:jbpm>
   -->
      
</components>

peristance.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for tests -->
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" 
             version="1.0">
             
   <persistence-unit name="AWB">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/AWBTestDatasource</jta-data-source>
      <properties>
         <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/AWBEntityManagerFactory"/>
      </properties>
   </persistence-unit>
    
</persistence>

ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar xmlns="http://java.sun.com/xml/ns/javaee" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd"
         version="3.0">
         
   <interceptors>
      <interceptor>
         <interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
      </interceptor>
   </interceptors>
   
   <assembly-descriptor>
      <interceptor-binding>
         <ejb-name>*</ejb-name>
         <interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
      </interceptor-binding>
   </assembly-descriptor>
   
</ejb-jar>

And the ds.xml file is in the server deploy folder also.

Plz help me
it would be a great help.

[nickarls]

Is the peristance.xml a typo in the post?

[kdcosta.mail.dcosta.gmail.com]

Sorry, i didnt get your question

[nickarls]

there are two typos in peristance.xml, it should be
persistence.xml

Fight!

[kdcosta.mail.dcosta.gmail.com]

Yes..
sorry i went worng

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for dev profile -->
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" 
             version="1.0">
             
   <persistence-unit name="AWB">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/AWBDatasource</jta-data-source>
      <properties>
         <property name="hibernate.hbm2ddl.auto" value="update"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/AWBEntityManagerFactory"/>
      </properties>
   </persistence-unit>
    
</persistence>

Now any idea??

[nickarls]

EAR or WAR deployment? Seam-gen or hand-rolled? Where have you placed the persistence.xml? Post your startup log.

[nickarls]

You might also want to try

@In
private EntityManager entityManager;

since you seem to have SMPC set up (although if PersistenceContext doesn't work, you'll likely hit troubles, too)

[kdcosta.mail.dcosta.gmail.com]

Thnkx a loy for the tip.

I have few doubts.

I have a page for which i have created a action controller class.
All the action methods are written in this class.
And when a button is clicked, it will enter the action method form where i am calling another class for example a ScreenManager.java.
And i wanted to do all the database operations in this manager class.

And in this manager class only im using the @PersistanceContext
and using the enitymanager.
And here the entitymanager is null.

But when i tried using the enitymanager when used directly in the action controller class it is not null.

So is there any way to connect these two manager class and action controller class.????
Is it a correct way to flow in seam framework????

rgds