gwt - MVP GWT - 注入(inject) EventBus 的问题

Question

奇怪的问题，当我注入(inject) EventBus e 时出现异常。该项目是gwt，使用mvp

这是示例代码。

Gin

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

这里是入口点

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();

}

我使用 gin 1.0 ，gwt-presenter

大家有什么想法吗？

谢谢

编辑:

异常(exception)是

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?)
...........................

还有 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" />

Answer 1

我认为您缺少 AbstractPresenterModule 类，该类确保 EventBus 绑定(bind)到 SimpleEventBus:

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

应该是这样的:

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

并且你必须注释你的 Ginjector

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