no this would be an absolute worse case scenario.
And i don't think we can search for an filename that can reside in any
package (== dir)
on a dir or in a jar.
I don't think this is possible. So i think for now we have the best way
possible.
But if anybody has a real good idea i am into it !
The current file is ofcourse as simple as possible just a classname
nothing more.
So it shouldn't be to hard to maintain it. For the rest we jump as soon
and fast as we can back into java code
(i also choose wicket because of lack of conf files, but i can't find a
better solution for this)
johan
Cameron Braid wrote:
This would be worse - you would still need to scan all jars / folders on the
class path - then for any filename ending in .class - you would have to do
Class.forName() which will load the class - thereby loading EVERY class on
the classpath - not a good idea.
Cameron
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:wicket-develop-
[EMAIL PROTECTED] On Behalf Of Gili
Sent: Friday, 12 August 2005 6:06 AM
To: [email protected]
Subject: Re: [Wicket-develop] feedback refactor and paging navigation
Taking one step further... would it be possible to drop the resource
file altogether and use pure reflection? Specifically, we search the
classpath for classes which implement interface IComponentInitializer
and if so we assume they contribute resources and invoke their
init(Application) method.
Cameron is right that someone should profile this but I think this
is
ideal in that it is truely object oriented and zero-configuration -- and
it is a one-time cost at startup.
Gili
Cameron Braid wrote:
This would mean searching every sub-directory of every classpath entry
(i.e.
jars and folders)
This will have a performance impact on the startup time of wicket - how
large - I dunno - someone cart to implement and profile ?
If the performance hit is insignificant - I think this is the better way
to
do it. Although - why not name the file ComponentClassName.wicket :)
Cheers,
Cameron.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:wicket-develop-
[EMAIL PROTECTED] On Behalf Of Gili
Sent: Friday, 12 August 2005 5:10 AM
To: [email protected]
Subject: Re: [Wicket-develop] feedback refactor and paging navigation
I'm +1 on Igor's proposal (.resource files) because amongst other
things, it'll allow you to merge multiple JAR files into one easily
(should you wish to do such a thing) and ship a JAR with a whole bunch
of related components as opposed to having to have a different JAR for
each component. Right now you'd have to merge the META-INF/ resource
file by hand. Also, obfuscators such as Proguard will automatically do
this sort of JAR file merging and "shrinking" but will not be able to
handle merging these META-INF files. Anyway... just food for thought.
Gili
Jonathan Locke wrote:
sorry. didn't mean to jump on you, igor. i just wanted to make sure
we
didn't throw
out something that's worth keeping... because there have been some
problems with
resources, a lot of people have been clamoring to change the whole
plan. since i've
been the one behind the current plan and wrote most or all of the code
for it, i have
been trying to explain why i wrote it that way. it's not perfect for
sure (nothing ever is!),
but i think the basic idea is not only not broken, but it's actually
pretty solid... especially
with the fixes we did last night.
i agree about the init thing, but i think that
Classloader.getResources() would have to
be enhanced to do this... not 100% sure though... if there's a
reasonable way to do this,
we should look into it.
Igor Vaynberg wrote:
Yes I see Jon. Thank you for a very long and detailed explanation as
to why
my idea sucked. I still think there is some room for improvement in
the
current situation. Cant we do a saerch through avail packages looking
for a
.resources file (im not sure how this would be done).
It would be nice to simply have DatePicker.resources side by side with
DatePicker.java. It would eliminate refactoring headaches at least as
far as
the package names go and it wouldn't be sitting in some separate
folder.
-Igor
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jonathan Locke
Sent: Thursday, August 11, 2005 1:17 AM
To: [email protected]
Subject: Re: [Wicket-develop] feedback refactor and paging navigation
actually it's not just that the service registration info has to be
put somewhere, it's that a client component that's using a service to
create a dynamic resource like, for example, some kind of panel that
wants a dynamic button image created...
/that component/ would have to be able to create its images /when the
app starts/ (because of clustering and server restarts). and /only
the panel component itself/ can or should know about this /and/ it
has to be done on startup. wicket's resource
handling classes are already fully featured, object-oriented
"services" (but less
vague and more OO powerful) by virtue of the fact that they implement
the IResourceListener interface and respond to requests for resources
(ANY resource). so i just don't see any value at all in this service
concept beyond what we've already got. in fact, i think it would
significantly /subtract/ from wicket's existing support for dynamic
resources (think "service" if you prefer)... and again, even if we
did change the world, it wouldn't solve the bootstrapping problem we
have for components.
Johan Compagner wrote:
how does a component with a dynamically generated image make that
image available in your scheme?
the component has to register the image with the service, doesn't
it?
The component doesn't need to register an image with a service, it
can register the service that creates the images.
The images themselves can be created on the first request
http://www..../app?service=mydynamicbuttons&button=A
Whenever this url is hit wicket forwards the control to the
registered mydynamicbuttons service (registered by whatever
component) which creates the image A, caches it, and streams it to
response. Or precreate whatever you need when the service
object is
created and registered with the application.
And THIS last part is just the problem
how does it register itself? When?
Where is it specified that a component does that?
I think in the end we have exactly the same thing...
you have a file like:
mydynamicbuttons=my.class.that.exposes.this.Service
johan
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