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From "Jorge Ferrer" <>
Subject Re: Is ReferenceManager clusterizable?
Date Sat, 21 Jun 2008 12:52:38 GMT
Thanks Janne,

This is exactly the information I needed :)

On Fri, Jun 13, 2008 at 9:57 PM, Janne Jalkanen
<> wrote:
>> Unfortunately while reading the code of ReferenceManager it seems to
>> be designed to work only on a single machine and not in a cluster.
>> This seems to be confirmed by
>> but I'd like to
>> make sure it's correct with the current version of JSPWiki. Is it?
> Yes, that is correct.  ReferenceManager is really designed to run only on a
> single machine.  We'll be replacing it in 3.0...
> However, note that ReferenceManager is really only a local cache for the
> references.  This means that if you're distributing JSPWiki across multiple
> machines, it's fine that every single one of them has a local copy of the
> references.  All you have to probably do is to ensure that each and all of
> them have a similar copy across multiple instances.  This can be relatively
> easily done by e.g. making the work directory the same for all instances -
> you might need to add locking, though.
> Note also that JSPWiki should be able to pick up changes in the repository
> automatically, so if you change one page, the other instances should be able
> to pick the changes up and also update the local reference cache.  By
> default, the checking interval is 30 seconds since last access and this can
> be tuned in
>> If it is, is there a way to substitute the ReferenceManager
>> implementation with a custom one?
> Yes, you can use the classmappings.xml to replace the ReferenceManager, but
> be warned that this solution can be a bit quirky.
> /Janne

Jorge Ferrer
Software Architect
Liferay, Inc.
Enterprise. Open Source. For Life.

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