CODEWITHSUNDEEP
gwtdependency-injectionmvp
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Reputation: 423

MVP GWT - problem injecting EventBus

Weird problem, when i inject EventBus e got an exception. The project is gwt using mvp

Here is the sample code.

Gin

public interface AppGinjector extends Ginjector
{
  EventBus getEventBus();
  PlaceManager getPlaceManager();
}

Here is the entry point 

public class MvpEntryPoint implements EntryPoint
{
AppGinjector ginjector = GWT.create(AppGinjector.class);

public void onModuleLoad()
{

  EventBus eventBus = ginjector.geEventBus();
  HelloWorldPanel display = new HelloWorldPanel();
  HelloWorldPresenter presenter = new HelloWorldPresenter( display, eventBus );

  presenter.bind();

  RootPanel.get().add( presenter.getDisplay().asWidget() );

  PlaceManager placeManager =  ginjector.getPlaceManager();
  placeManager.fireCurrentPlace();

}

i use gin 1.0 , gwt-presenter

Any has any idea?

Thanks

Edit:

The exception is

ERROR: Deferred binding result type 'net.customware.gwt.presenter.client.EventBus' should not be abstract. 
ERROR: Unable to load module entry point class com.gmgsys.mvpEntryPoint.client.MvpEntryPoint (see associated exception for details). java.lang.RuntimeException: Deferred binding failed for 'net.customware.gwt.presenter.client.EventBus' (did you forget to inherit a required module?)
...........................

also the gwt.xml 

  <!-- Specify the app entry point class.                   -->
    <entry-point class='com.gmgsys.mvpEntryPoint.client.MvpEntryPoint'/>
    <inherits name='net.customware.gwt.presenter.Presenter' />
    <inherits name="com.google.gwt.inject.Inject" />

Upvotes: 2

Views: 2143

Answers (1)

&#220;mit
&#220;mit

Reputation: 17489

I think you are missing the AbstractPresenterModule class which makes sure that EventBus is bound to SimpleEventBus: 

bind(EventBus.class).to(SimpleEventBus.class).in(Singleton.class);

It should be something like that: 

public class MyClientModule extends AbstractPresenterModule {
  protected void configure() {
     bind(EventBus.class).to(SimpleEventBus.class).in(Singleton.class);
     // more bindings here
  }
}

And you have to annotate your Ginjector

@GinModules({ MyClientModule .class })
public interface AppGinjector extends Ginjector
{
  EventBus getEventBus();
  PlaceManager getPlaceManager();
}

Upvotes: 4

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