Can you talk through the use-cases for user-defined just-in-time
bindings? As far as I can see, using providers to obtain just-in-time
binding behaviour is highly dangerous. i can imagine some leegitimate
use-cases for it, but most of the time when people talk about such
things (often injecting a Provider as a workaround) they really are
trying to workaround Guice's lack of lifecycle support.
One of my deepest concerns with JIT bindings is the wonderful way in
which it moves your wiring errors JIT as well, which makes debugging
more difficult, and can result in learning about such errors in
production AFTER deployment, depending on the particular layout and
timings of your injections. So, powerful, but dangerous and there
might be more suitable ways to accomplish what you want.
What would you need just-in-time bindings for?
Christian.
On May 31, 2010, at 11:12 PM, Pascal-Louis wrote:
Hi all,
We've had a long standing grudge against Guice (which we love in all
other respects!): the inability to have user-defined just-in-time
bindings.
Over the course of the long weekend, I've implemented this feature and
would love some feedback. Check it out on
http://eng.kaching.com/2010/05/just-in-time-providers-for-guice.html.
I would specifically appreciate feedback from the Guice team on the
process to integrate this patch into trunk. On a more tactical note, I
was unsure about which injection points to use, see the ??? comment in
the method
http://github.com/pascallouisperez/guice-jit-providers/blob/master/src/com/google/inject/internal/InjectorImpl.java#LID830
.
Best,
PL
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