Santiago Gala wrote:
>
> [EMAIL PROTECTED] wrote:
>
> > Santiago Gala wrote:
> >
> > >
> > > We are currently considering webDAV for our access to the Resource
> > > server in our first trial implementation, having one machine that
> > > will get the resources and handle caching, expiration and locking of
> > > writes, while a farm of Jetspeed servers will have configured webDAV
> > > access to these machine and maybe local caching of some external
> > > resources. Still, it will use the (missnamed)JetspeedDiskCacheEntry
> > > to coordinate access to the resources.
> >
> > Sounds very reasonable. Basically, this means you have a proxy that does
> > caching for all your portal servers, right ? What do you mean by
> > coordinating access to resources ? If you have a proxy that does caching,
> > wouldn't it coordinate access to resources on the web ?
> >
>
> There are two different issues:
> - Caching proxy, or similar, for remote URL.
> - Locking/Transactional integrity for writable objects, such as user PSML or
> user content (we plan to allow users to build, author and share their own
> channels).
>
There 3 issues, which IMO should be clearly separated in Jetspeed :
- the caching needs of the layout system for optimizing performance
(mainly in memory resource and content caching). This should not care about
remote URLs or content write access concurrency
- resource content management and integrity preservation.
This complex issue should be addressed by a dedicated content management
system (I know at least 2 such OSS project: Prowler and Slide, both Apache
or Apache compatible). Jetspeed should define a content management interface
for plugging to these systems for handling complex cases and provide a simple
content management implementation for the out-of-the-box evaluation purpose
or small load sites.
- syndication caching
Can be thought of as an extension of the content management issue but has
some specific issues (mainly managing relations with the syndicators).
Those interested in exploring the full scope of syndication issues may have
a look a the ICE specification...
--
Rapha�l Luta - [EMAIL PROTECTED]
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