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From "Deacon Marcus" <>
Subject RE: PageCaching Feature
Date Sun, 03 Feb 2002 14:13:56 GMT
Check , you may find it interesting.

Greetings, deacon Marcus

> -----Original Message-----
> From: Gunnar Wagenknecht []
> Sent: Sunday, February 03, 2002 2:46 PM
> To:
> Subject: PageCaching Feature
> Hi!
> I'm wondering if it is possible to implement a page chaching mechanisme
> into the Tomcat Engine? Did anyone thought about this before? Where can
> I find suitable development documents to evalutate the implementation of
> such a functionality into the Tomcat Engine?
> I currently evaluating and working on some proposals for an extensive
> web application. To speed up performance and to reduce the load it would
> be great to add a HTML comment tag (for example: <!-- PAGECACHE
> created="date&timestamp" expires="hours:minutes" -->) to the HTML Output
> Stream. It is not crucial whether this tag was inserted into a JSP or by
> a Servlet. Tomcat than realizes that it should cache this result that
> was returned by calling the specific URL and safes the complete HTML
> output stream into a file on the disc.
> Next time this URL is retrieved Tomcat first looks, if there is a cached
> page available and if this page is not obsolete. If there is a valid
> cached page, Tomcat doesn't need to call the WebApplication instead
> Tomcat can return the result immediatly. Of curse the evalutation of the
> URL is not simple because you have to look for URL path and parameter
> and it should pe possible to tell the page caching mechanisme which URL
> parameters a sensible and which it should ignor.
> What do you guys think of this? I'm not an experienced developer that's
> why I'm asking you where I can start. What do you expect about the
> complexity (development/implementation time) of such a feature?
> Until today I only saw solutions with an "adapter application" between
> the webserver and the web applcation. But this adapter application has
> to be developed for every webserver API which you want to support. But I
> plan to access Tomcat directly and not over a web server.
> Cu, Gunnar
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