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List:       lenya-dev
Subject:    Re: Storing workflow information in meta data
From:       "J. Wolfgang Kaltz" <kaltz () interactivesystems ! info>
Date:       2005-05-29 16:48:55
Message-ID: 4299F277.8030807 () interactivesystems ! info
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Andreas Hartmann schrieb:
> Hi Lenya devs,
> 
> now that we have mandatory meta data, it would be possible
> to store the current workflow state and variable values in
> there. That would rid us of the additional workflow history
> file.
> 
> Actually I have a patch in my sandbox which stores the complete
> history in the meta data, but that wouldn't scale and parsing
> the meta data would become slower over time (at least unless
> we use Jackrabbit etc.).
> 
> I'd like to propose the following approach:
> 
>   - the current state and variable values are stored in the
>     meta data
> 
>   - there is a global workflow log which can be queried to
>     resolve history information
> 
> This solves the performance issue and allows to get the history
> information (which would be a significantly slower, but IMO this
> is a rather rare usecase).
> 
> WDYT?

+1
IMO this is a good separation of concerns (current state / history of 
states are 2 different concerns).


--
Wolfgang

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