10 Replies Latest reply on Mar 4, 2011 11:45 PM by jaikiran pai

    Bootstrap custom class during Jboss startup

    Anil Mathew Newbie

      Hi,

       

        We have a application running on Jboss 5.1 and I was wondering is there a way i can update the Jboss configuration to include a Java class so that it will get picked during the Jboss startup process (similar to bootstrap). Note that my Java class will be calling EJB methods as a part of process. Any thoughts?

       

      Thanks

      Anil Mathew

        • 1. Bootstrap custom class during Jboss startup
          Anders Welen Apprentice

          You could  implement it in a JBoss lifecycle MBean (use it's startup callbacks). Put in it's own jar file

          togheter with a dependecies towards the jars that contains the EJB it will call.

          • 2. Re: Bootstrap custom class during Jboss startup
            Anders Welen Apprentice

            Perhaps a simpler way is to use the @Singleton (or @Service in JBoss 5) and the standard callback annotations like @PostConstruct.

            • 3. Bootstrap custom class during Jboss startup
              Anil Mathew Newbie

              Thank you for sharing your thoughts. Yes, @Service along with @PostConstruct should work. But I really can't find the jar which has the @Service annotation. Like i said i am using Jboss 5.1. Does the jar comes with the Jboss 5.1?

               

              Thanks

              Anil Mathew

              • 4. Bootstrap custom class during Jboss startup
                jaikiran pai Master

                @org.jboss.ejb3.annotation.Service comes in jboss-ejb3-ext-api.jar which you can find in JBOSS_HOME/client folder. And by the way, be sure to use our latest EJB3 plugin http://www.jboss.org/ejb3/ejb3plugin.html against JBoss AS 5.1.0 since there have been some @Service related fixes after JBoss AS 5.1.0 was released.

                • 5. Bootstrap custom class during Jboss startup
                  Anil Mathew Newbie

                  Thank You Jaikiran.

                   

                  I was able to get the jboss-ejb3-ext-api.jar and also I created a class which has @Service and @PostConstruct. As you suggested i also ran the plugin (and I could see it ran correctly - which was really Awesome!). As expected the PostConstruct method is called during the Jboss startup (whowhoo..i was so excited).

                   

                     But when i updated my @PostConstruct method to call a EJB method to get records, it is failing with the below error:

                  17:46:27,511 ERROR [ServiceContainer] Encountered an error in start of PropertyRegistryServiceImpl

                  java.lang.RuntimeException: javax.ejb.EJBTransactionRequiredException: public java.util.Collection com.tixx.persistence.properties.manager.impl.ApplicationPropertyManagerImpl.findAllApplicationProperties()

                          at org.jboss.ejb3.interceptors.container.AbstractContainer.invokeCallback(AbstractContainer.java:262)

                          at org.jboss.ejb3.EJBContainer.invokeCallback(EJBContainer.java:1161)

                          at org.jboss.ejb3.EJBContainer.invokePostConstruct(EJBContainer.java:1170)

                          at org.jboss.ejb3.service.ServiceContainer.lockedStart(ServiceContainer.java:265)

                          at org.jboss.ejb3.EJBContainer.start(EJBContainer.java:905)

                          at org.jboss.ejb3.service.ServiceContainer.start(ServiceContainer.java:846)

                   

                  It seems like the transaction (EntityManager) is null. I am using EJB3 with Hibernate. Below is my code snippet:

                   

                  @Service
                  @Remote( { com.tickets.service.properties.PropertyRegistryServiceRemote.class })
                  @TransactionAttribute(TransactionAttributeType.REQUIRED)
                  public class PropertyRegistryServiceImpl implements PropertyRegistryServiceRemote{

                   

                      @EJB
                      EntityManager entityManager;

                    
                      @PostConstruct
                      public void applicationStartup() {
                       System.out.println("Jboss Properties Initializing!!!!!");
                       try{
                        Collection<ApplicationProperty> props = this.entityManager.findAllApplicationProperties(AppContextHolder.getUserContext());
                       }catch(Throwable e){
                        System.out.println("Jboss Properties Initializing ERROR: "+ e);
                       }
                      }
                  }

                   

                   

                  Any idea what am i missing here?

                  • 6. Bootstrap custom class during Jboss startup
                    Ales Justin Master
                        @EJB

                        EntityManager entityManager;

                    Shouldn't this be @PersistenceContext?

                    • 7. Bootstrap custom class during Jboss startup
                      Anil Mathew Newbie

                      Thanks Ales for the reply.

                       

                      I was stupid and it was a code mix up and entityManager was the issue and i got ALL working yesterday night!!!!

                       

                      A wrap up of what I did to make it work:

                       

                      • Created a class with @Service and @Remote annotation.
                      • The class has a method with @PostConstruct annotation and this method will call a EJB (via Hibernate) and get all my records (property name/values) from database.
                      • Make sure to have  jboss-ejb3-ext-api.jar and run the necessary plugin as mentioned by Jaikiran.

                       

                       

                       

                       

                      Thank You all. I AM IN LOVE WITH JBOSS 5.1

                       

                      Anil

                      • 9. Bootstrap custom class during Jboss startup
                        Anil Mathew Newbie

                        Thank you for the support. I do have a question in regards to the plugin which i ran for the Jboss 5.1.

                         

                        I was wondering what exactly does it do when i run the plugin? I mean are we adding new jar files to different directory under Jboss home? The reason i asked is i will have to do the same to my QA / Production environment. I am little hesistant to run this directory in production.

                         

                        Anil Mathew

                        • 10. Bootstrap custom class during Jboss startup
                          jaikiran pai Master

                          Anil Mathew wrote:

                           

                           

                           

                          I was wondering what exactly does it do when i run the plugin? I mean are we adding new jar files to different directory under Jboss home?

                          The plugin replaces some of the JBoss EJB3 implementation jars with new ones containing bug fixes.