Re: Pb with activity and events (using gin)

check if the instance of EventBus is the same. I know you have declared it as eagerSingleton in your GIN configuration. But do a quick log to see if the instances are the same.

I remember encountering a similar issue wherein I used to have a new instance of the EventBus getting injected even though I had a similar configuration as yours. In order to fix the problem I had to do the following

1. define a provider

public static class EventBusProvider implements Provider<EventBus> {

private static EventBus bus = null; 

/* (non-Javadoc)

* @see com.google.inject.Provider#get()

*/

@Override

public EventBus get() {

if(null == bus)

bus = new SimpleEventBus();

return bus;

}

}

2. bind

bind(EventBus.class).toProvider(EventBusProvider.class).in(Singleton.class);

On Tue, Jun 4, 2013 at 4:16 PM, Tugdual Huertas <tugdual.huertas@gmail.com> wrote:

Hi all,

i'm facing a litlle problem using places activities and events... Have tried multiple tricks but not luck .

My problem:

i try to fire an event from the activity but my widget does not catch it since its not loaded (I mean that if i fire this event once the widget's loaded everything works fine).

Here is my Gin configuration:

@Override

protected void configure()

{

   bind(EventBus.class).to(SimpleEventBus.class).asEagerSingleton();

   bind(PlaceHistoryMapper.class).to(MyPlaceHistoryMapper.class).in(Singleton.class);

   bind(ActivityMapper.class).to(MyActivityMapper.class).in(Singleton.class);

   bind(MyActivity.class);

   install(new GinFactoryModuleBuilder().build(MyActivityMapper.Factory.class));

}

@Provides

@Singleton

public PlaceController getPlaceController(EventBus eventBus)

{

   return new PlaceController(eventBus);

}

@Singleton

@Provides

public ActivityManager provideActivityManager(ActivityMapper activityMapper, EventBus eventBus)

{

   return new ActivityManager(activityMapper, eventBus);

}

in MyActivity:

@Inject

private MyWidget myWidget;

@Inject

private EventBus globalEventBus;

@Override

public void start(AcceptsOneWidget panel, EventBus eventBus)

{

   panel.setWidget(myWidget);

   MyEvent event = new MyEvent();

   event.setAction(MyEvent.Action.INIT);

   globalEventBus.fireEvent(event);

}

I also try two different ways of binding events in my widget, during onLoad and in constructor:

During onLoad:

@Inject EventBus eventBus;

@Override

protected void onLoad()

{

   handlersRegistration.add(eventBus.addHandler(MyEvent.TYPE, this));

}

In constructor:

private EventBus eventBus;

@Inject

public MyWidget(EventBus eventBus)

{

   this.eventBus = eventBus;

   // registration of handlers

   handlersRegistration = new ArrayList<HandlerRegistration>();

   // register myself has a listener of different event TYPE

   handlersRegistration.add(eventBus.addHandler(MyEvent.TYPE, this));

   

   ...

}

Am I doing something w rong or missing something?

Thks in advance

Tugdual

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