How can I obtain a reference to the MessageBus inside my Seam web application on the server side? I see that the ServerMessageBusImpl is being injected by Guice in AbstractErraiServlet, but the injector instance seems to be private. So even if I use Guice myself, it will be a different injector, and hence a different singleton scope, right? It looks like all the ErraiBus examples have server classes annotated with @Service, and constructors which @Inject the MessageBus. I'm not sure if I can do exactly that. For the moment, I would like to construct the objects myself. If I could obtain the right Guice injector, I could call Injector.injectMembers on the objects which need the MessageBus. Hmm. I'm not going to have to re-architect everything, am I? (BTW, unlike the examples, I'm not implementing MessageCallback on the server, I just want to send messages on the same bus that my clients are polling.) So is there some way I can obtain a reference to the Injector or the ErraiService from "outside"? Or will I have to annotate a class with @Service? It looks to me as if ErraiServiceConfiguratorImpl wants to construct the object itself (via Guice), which probably won't work for Seam components... Am I going about this all wrong, or what? Thanks Sean. -- Sean Flanigan Senior Software Engineer Engineering - Internationalisation Red Hat _______________________________________________ errai-users mailing list errai-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/errai-users

When running on JBossAS you can use the org.jboss.util.naming.NonSerializableFactory to bind the bus to JNDI: private void rebind() throws NamingException { InitialContext rootCtx = new InitialContext(); Name fullName = <Jndi Name>; NonSerializableFactory.rebind(fullName, <ErraiBus>, true); } IIRC you use a Seam @Factory declaration [1] that's doing the lookup, or use the seam components.xml to declare it externally. [1] http://docs.jboss.org/seam/2.1.2/reference/en-US/html/concepts.html#d0e4345 /Heiko On Feb 1, 2010, at 5:36 PM, Mike Brock wrote: > Well, we were always intending to support Seam as a container. > > We have an interface called ErraiConfigExtension which exposes the > bootstrap process. You can use it to grab access to an ErraiBus > instance and, in turn, bootstrap another container: > > /** > * Create a config extension class so we can do things like setup the > default tables > * when the application is deployed, etc. > */ > @ExtensionComponent > public class AppConfigurator implements ErraiConfigExtension { > > private MessageBus bus; > > @Inject > public AppConfigurator(MessageBus bus) { > this.bus = bus; > } > > public void configure(Map<Class, Provider> bindings, Map<String, > Provider> resourceProviders) { > // provide extension points here > } > } > > The configure() method is called when the component is auto-discovered > in the class path. So you could, in theory, simply expose the Errai > container to Seam or JNDI, etc. > > Mike. > > On 2010-02-01, at 3:19 AM, Sean Flanigan wrote: > >> >> How can I obtain a reference to the MessageBus inside my Seam web >> application on the server side? >> >> I see that the ServerMessageBusImpl is being injected by Guice in >> AbstractErraiServlet, but the injector instance seems to be private. So >> even if I use Guice myself, it will be a different injector, and hence a >> different singleton scope, right? >> >> It looks like all the ErraiBus examples have server classes annotated >> with @Service, and constructors which @Inject the MessageBus. I'm not >> sure if I can do exactly that. For the moment, I would like to >> construct the objects myself. If I could obtain the right Guice >> injector, I could call Injector.injectMembers on the objects which need >> the MessageBus. >> >> Hmm. I'm not going to have to re-architect everything, am I? (BTW, >> unlike the examples, I'm not implementing MessageCallback on the server, >> I just want to send messages on the same bus that my clients are >> polling.) >> >> So is there some way I can obtain a reference to the Injector or the >> ErraiService from "outside"? Or will I have to annotate a class with >> @Service? It looks to me as if ErraiServiceConfiguratorImpl wants to >> construct the object itself (via Guice), which probably won't work for >> Seam components... >> >> Am I going about this all wrong, or what? >> >> Thanks >> >> Sean. >> >> -- >> Sean Flanigan >> >> Senior Software Engineer >> Engineering - Internationalisation >> Red Hat >> >> _______________________________________________ >> errai-users mailing list >> errai-users(a)lists.jboss.org <mailto:errai-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/errai-users > > _______________________________________________ > errai-users mailing list > errai-users(a)lists.jboss.org <mailto:errai-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/errai-users

I agree. A static field is ugly. You can use the <depends> clause in any jboss descriptor to make sure the errai webapp is started before the seam components. (If they are separate deployments)

However, if run into trouble again don't hesitate to get in touch with me. Things like this shouldn't prevent you from getting started. BTW, are you using Seam or Weld?

/Heiko On Feb 2, 2010, at 6:44 AM, Sean Flanigan wrote: > Thanks, I've kludged something together with that info. I found that > Errai's startup happens after all my Seam components are > initialized/injected, because the Errai servlet loads after > SeamListener. So I'm just stuffing the MessageBus into a static field > for now. Ugly, I know, but getting started with Errai is taking about a > week longer than I'd hoped (for various reasons).