Hi,
I am using resource references for the first time to implement fetching
images from a DB. The URLs will be of the following form:
"/resources/dbImages/DB_ID.png" where DB_ID is an identifier to retrieve
the image from the DB.
I'm using the article at
http://wicketinaction.com/2011/07/wicket-1-5-mounting-resources/ as a
guide and have a couple of questions.
1. What is the purpose of the equals() override in the class
ImageResource? I don't understand the explanation given in the
article... Also, I put a breakpoint in my own resource class' equals()
method and it never hits!
2. Can I use part of the "resources" namespace or is that asking for
trouble since Wicket can use it however it likes?
3. When using getRequestCycle().urlFor(new MyResourceReference(),
imageParameters), the following happens:
at line 216 in ResourceMapper#addCachingDecoration(Url, PageParameters) :
final IResource resource = resourceReference.getResource();
with a comment right above that says "// TODO is calling getResource() a
potential performance bottleneck?"
I am concerned that each time a url to my image resource reference is
created, the DB will be hit, simply for getting the Url! It will then
maybe be hit a second time afterwards if the client doesn't have the
image in cache. Am I completely off-base here? Is there another way to
manage resources so this doesn't happen?
Thanks,
Bertrand
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