Getting something to run at Startup...

[tony.herstell1]

Finally back to doing some SEAM after a LONG LONG break!

I want to run a Bean at startup... I simply want to pre-load some stuff in the database if it's not there already (another way would be to use import.sql but I don't want to guess all the Enum's)... I strongly use Enums (to cater for lack of Ada like Types. Anyhow...

I try this (below) but I don't know what the incantation is to get the method to actually run (you can see me trying the constructor.

This HAS to run before another bean... as he other bean expects the stuff to be in the database.

@SuppressWarnings("serial")
@Stateless
@Scope(value=ScopeType.APPLICATION)
@Startup
@Name("initialisationController")
public class InitialisationControllerImpl implements InitialisationController, Serializable {

        /**
         * Inject and leverage the Seam Logger.
         */
        @Logger
        private Log log;
        
        /**
         * Inject the EJB3 Persistence context in EXTENDED mode so will remain
         * "current" over multiple client/server round trips.
         */
        @PersistenceContext
        private EntityManager em;
        
        public InitialisationControllerImpl() {
                log.info("Initialising Resource Kinds if required.");
                for (ResourceKind eachResourceKind : ResourceKind.values()) {
                        Query theQuery = em.createQuery("from Resource r where r.kind = :kind").setParameter("kind", eachResourceKind);
                        if (theQuery.getResultList().isEmpty()) {
                                Resource resource = new Resource();
                                resource.setKind(eachResourceKind);
                                resource.setOpen(true);
                                log.info("adding " + eachResourceKind);
                                em.persist(resource);
                        }
                }
        }
}

If a bean outjects an object I can get it to work ok; but the above code doesnt outject anything; so I cant hang a factory off a method.

     @Out(scope=ScopeType.SESSION)
     Resource indoorArenaOpenStatus;

     @Factory (value="indoorArenaOpenStatus")
     public void initIndoorArenaStatus() {
          log.info (">initIndoorArenaStatus");
          indoorArenaOpenStatus = getResource(ResourceKind.INDOOR_ARENA);
     }

[taccart.thierry.accart.name]

Hi Tony

maybe could you use Seam Observer annotation  with org.jboss.seam.postInitialization ?

Pete wrote an entry in his blog in.relation.to : see
http://in.relation.to/Bloggers/DoingSomethingAtStartupWithSeam

Rgds

[tony.herstell1]

Thanks Thierry, I will lok at this tonight when I get back from work.
It would seem a common thing to do; i.e. Do something at startup (grab resources etc.) I assumed it would be trivial! It's probably just me not RTFM properly.

[admin.admin.email.tld]

Pete's recommendation is one way:

@Name("observeInitialization")
public class ObserveInitialization {

   @In EntityManager entityManager;

   @Observer("org.jboss.seam.postInitialization")
   public void observe() {
      // Do your initialization here
   }
}

Here's another I've used:

in components.xml:

   <event type="org.jboss.seam.postInitialization">  
        <action execute="#{controller.scheduleTimer}"/>
   </event>

[tony.herstell1]

Yes this worked perfectly.

Thanks all of you.

I must admit I read the manual a lot when stuck; but always forget about the FAQ's and it was in there too...