Many thanks! Much more clear.
在 2013年1月5日星期六UTC+8下午8时14分48秒，Mikhail Mazursky写道：
>
> The first way you implicitly bind to an instance (so provider is
> singleton itself - guice will never instantiate it):
> bind(BaseModelProvider.class).toInstance(new BaseModelProvider());
> bind(Model.class).annotatedWith(Names.named("index")).toProvider(BaseModelProvider.class);
>
>
>
> The second way you implicitly bind in prototype scope (no scope):
> bind(BaseModelProvider.class);
> bind(Model.class).annotatedWith(Names.named("index")).toProvider(BaseModelProvider.class);
>
>
>
> If you want your providers to be in some scope then you should let
> Guice create them for you and either annotate them with scoping
> annotation (e.g. with @Singleton) or bind them in scope (like
> bind(BaseModelProvider.class).in(Singleton.class);).
>
> 2013/1/5 Michael <[email protected] <javascript:>>:
> > Hi All,
> >
> > I found a very interesting thing about the scope of the provider. Here
> is
> > the code of BaseModelProvider
> >
> > public class BaseModelProvider implements Provider<Model> {
> > private int num;
> > @Override
> > public Model get() {
> > System.out.println(num++);
> > return new Model();
> > }
> > --------------------------------------------------------------------
> >
> this.bind(Model.class).annotatedWith(Names.named("index")).toProvider(new
> > BaseModelProvider());
> >
> > This way gives : 1,2,3,4,5,6.....(in singleton scope)
> > ---------------
> >
> this.bind(Model.class).annotatedWith(Names.named("index")).toProvider(BaseModelProvider.class);
>
>
> > This way gives : 0,0,0,0,0.....(in request scope)
> >
> >
> > I don't understand the different about this two definitions. So anybody
> > knows how it works ? many thanks!
> >
> > BTW: I just want bind many providers dynamically within a loop, So I am
> > using the .toProvider(Prvider<? extends Model> instance).
> >
> >
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