Guice & LazyInitProxyFactory : NPE when calling, first, public fields

[Joseph Pachod <jp...@thomas-daily.de>]

hi

We're using Wicket with Guice.

An issue has just popped up : on some special injected objects, we 
access public fields. These public fields are themselves injected 
through guice.

However, due to the LazyInitProxyFactory, they're not. Indeed, as far as 
I got it, the LazyInitProxyFactory waits for the first method call to do 
the actual injection.

So, currently, when calling directly some members on guice injected bean 
in wicket, I get a NPE.

I fear I've missed something obvious, but I don't find an easy way out...

Any suggestion ?

thanks in advance

-- 
Joseph Pachod
IT

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Re: Guice & LazyInitProxyFactory : NPE when calling, first, public fields

[Uwe Schäfer <sc...@thomas-daily.de>]

Uwe Schäfer schrieb:
> To me this does not feel like necessarily the right behaviour. I do not 
> see a tremendous advantage in this resolving being done lazily.

for the record: we could change to doing it non-lazy, but it does not 
solve this particular issue, as the value of public field is constant, 
depending on the point in time where the CGLib-subclassing happened.

and as we cannot intercept field access...

cu uwe


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Re: Guice & LazyInitProxyFactory : NPE when calling, first, public fields

[Uwe Schäfer <sc...@thomas-daily.de>]

Joseph Pachod schrieb:

> We're using Wicket with Guice.
> An issue has just popped up : on some special injected objects, we 
> access public fields. These public fields are themselves injected 
> through guice.
> 
> However, due to the LazyInitProxyFactory, they're not. Indeed, as far as 
> I got it, the LazyInitProxyFactory waits for the first method call to do 
> the actual injection.

To me this does not feel like necessarily the right behaviour. I do not 
see a tremendous advantage in this resolving being done lazily.

My suggestion would be to add a switch in some Settings object, that 
controls this behaviour and inject as requested without deferrence.

As i don´t like the idea to live with a longterm patch of wickets, would 
it be acceptable to include this kind of tweak into the wicket-guice 
codebase if i provided an appropriate patch?
And if so, what would be the right place for such a switch?

cu uwe


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