Good to hear ;) On Fri, May 20, 2011 at 8:43 AM, andre.doelger <[email protected]>wrote:
> Great! Now everything works. > > On May 17, 4:18 pm, Bálint Kriván <[email protected]> wrote: > > Please have a look at the following piece of codes: > > > > The ServiceLocator implementation: > https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch... > > > > <https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch.. > .> > > EntityLocator: > https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch... > > <https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch.. > .>It's > > used for single entities. > > > > An example RequestContext: > https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch... > > <https://github.com/messo/KFC/blob/master/kfc-war/src/main/java/hu/sch.. > .>Note > > the locator = BeanLocator stuff > > > > And the implementation which is an EJB: > https://github.com/messo/KFC/blob/master/kfc-ejb/src/main/java/hu/sch... > > > > <https://github.com/messo/KFC/blob/master/kfc-ejb/src/main/java/hu/sch.. > .>It > > was working a several weeks ago with 2.2, I didn't checked with 2.3. > > > > 2011/5/17 andre.doelger <[email protected]> > > > > > > > > > > > > > > > > > > > > > Hi, > > > > > the example implementation is not really working. I've tried a > > > RequestFactory/EJB integration like this with GWT 2.3. > > > When findGroups() is called from a GWT client the EJB look-up via > > > BeanLocator is okay. But before GWT returns the objects to the client > > > it directly creates a instance of GroupManager and calls find() for > > > each returned object. The dependcy injection did not take place and > > > the EntityManager is null -> NullPointerexception. > > > > > What I do not understand: > > > > > 1. Why does the RequestFactory directly creates an instance of the > > > Locator and do not use the ServiceLocator? > > > 2. Why call find() for each entity that is returned in the List -> > > > Creates n+1 SQL calls > > > > > Regards, > > > > > André > > > > > On 2 Feb., 12:25, Bálint Kriván <[email protected]> wrote: > > > > Ok, I've found the problem: > > > > > > Using EJB bean for Locator implementation isn't good, because GWT > > > > instantiate it, so we have to make a EntityLocator, which lookups for > the > > > > EJB and invoke the right methods. I hope this helps to the others! > > > > > > 2011/2/2 Bálint Kriván <[email protected]> > > > > > > > Hi! > > > > > > > Did anybody tried to use RequestFactory with EJB Beans using > > > > > Locator/ServiceLocator? > > > > > > > I'm having a little issue here. > > > > > > > My stateless session bean extends Locator<Group, Long>. For my > > > > > RequestContext I use a ServiceLocator which uses > > > InitialContext.doLookup(); > > > > > to lookup the EJB (I can't use @EJB because the ServiceLocator > instance > > > > > isn't container-managed -- btw. is there any solution for this? > lookup > > > looks > > > > > ugly). Everything looks fine, but in my Bean, the entityManager > > > instance is > > > > > null (I'm using @PersistenceContext annotation on it) when GWT > wants to > > > > > invoke find(Class<?>, Long) method: here I use simple em.find(). > It's > > > > > strange because invoking from a servlet, using @EJB, it works fine. > > > What am > > > > > I doing wrong? > > > > > > > I've created a gist for it:https://gist.github.com/807082 > > > > > > > So in this file: > > >https://gist.github.com/807082#file_group_manager.javaLine > > > > > #29, the em is null, but using this servlet: > > > > >https://gist.github.com/807082#file_test_servlet.javaitworks > > > perfectly. > > > > > > > Has anybody experience with this problem? I would like to use EJBs, > > > because > > > > > I would like to have JTA and Container-managed transactions. Thanks > for > > > any > > > > > advice! > > > > > > > -- > > > > > Regards, > > > > > Bálint Kriván > > > > > > -- > > > > Üdv, > > > > Kriván Bálint > > > > -- > > Üdv, > > Kriván Bálint > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- Üdv, Kriván Bálint -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
