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From Musachy Barroso <>
Subject Re: Class reloading
Date Mon, 13 Jul 2009 16:29:57 GMT
I am thinking about adding another constant which holds a list of
regex, which if set, will limit what classes can be loaded by the
reloading classloader. The reason for this, is that I would like to
limit the reloaded classes to just my actions. If the reloading class
loader loads something that is not an action, there is a good chance
that instance of that class will be casted to the same class loaded by
the original class loader, which fails with a class cast exception.


On Mon, Jul 13, 2009 at 7:10 AM, Dale Newfield<> wrote:
> Musachy Barroso wrote:
>> I could test the path as an absolute path, if it exist, use it,
>> otherwise try it as a relative path to context root, sounds good?
> Almost.  The File interface can tell you whether or not a given instance
> (path) isAbsolute().  Clearly if the (absolute or relative) file does not
> exist it should not be loaded, but existence shouldn't help you decide which
> way to interpret the path.
> This does bring up the question:  If the given (.class or .jar) file does
> not exist at deployment time, will creation of it/changes to it later
> trigger reloading?  Either way, just to avoid confusion that bit of info
> should be added to the documentation.  (Hrm--looking at
> FilesystemAlterationListener and ClassReloadingXMLWebApplicationContext
> suggests that if the file exists at deployment time we should notice in
> onFileChange as you currently do, but if it did not exist (and we want to
> support later adding of classes/jars) we could be paying attention to
> onFileCreate/onDirectoryCreate events, too.)
> Oh, and once again:  Musachy++
> Lately it seems like Struts is improving more due to the heroic effort of a
> few individuals than as a result of a community effort.  (I have a feeling
> that this has fairly consistently been the case throughout the lifetime of
> struts v1 and v2.)  I'm happy that struts is improving, so I'm not trying to
> discourage heroic effort, but I'm wondering if anyone has any suggestions
> for how to get more involvement?
> -Dale
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