Sweet... Good direction.
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Craig Andera
Sent: Monday, October 29, 2007 2:36 PM
To: 'FlexWiki Users Mailing List'
Subject: [Flexwiki-users] Changes
I just checked in a pretty big change. Big in the sense of lots of files
affected. Moderate in terms of the impact.
What I've added is another content pipeline provider called DependencyRecorder.
This is a provider that sits at the very front of the chain and essentially
records every request into the pipeline. This is in support of the output
caching stuff I'm working on. It's essentially the first third of the
implementation - the next bit will be a ModificationRecorder that will detect
writes and notify the WikiApplication accordingly. The third part will be the
bits in the WikiApplication that maintain the output cache accordingly,
invalidating cache items when the appropriate modifications come in.
In order to pull this off, the biggest change for developers is that *every
request into the content pipeline* must now have an active RequestContext. This
is fairly simple, as you just need to do something like this:
using (RequestContext.Create())
{
// Do operations here
}
for every top-level request. Note that nested RequestContexts are supported
only for unit testing configurations, because they make it somewhat harder to
ensure cache coherency. If you do not establish a RequestContext before calling
into the pipeline, you'll get a MissingRequestContextException, so it should be
pretty obvious how you screwed up.
Create will probably change somewhat in the near future to require a require an
IWikiApplication, but that'll be an easy change, as the compiler will tell us
if we miss anything.
I've tried to go through everywhere and add in this call, but I've likely
missed something. So anyone that has a chance to download build 2.0.0.164 and
try this out, please mash buttons and see if you can shake out any corner cases.
If there are any questions about this change or the planned output caching
feature of which this is a part, please ask.
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