java - Inject the same Instance of an Interface across my Application? -

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in gwt/gwtp app have interface instantiate in entrypoint class:

@override public void onmoduleload() {      final a = gwt.create(a.class);     }

now want inject interface instance in presenters this:

private final a;   @inject public apppresenter(final eventbus eventbus, final myview view,         final myproxy proxy, a) {     super(eventbus, view, proxy);      this.a = a; }

my idea bind interface in gin module like: 

bind(a.class).aseagersingleton();

this guarantee 1 instance. problem interface has no constructor fail.

ho instantiate of interface across application?


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