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http://jira.nuxeo.org/browse/NXP-2851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on NXP-2851 started by Thierry Delprat.
> Improve transformer service
> ---------------------------
>
> Key: NXP-2851
> URL: http://jira.nuxeo.org/browse/NXP-2851
> Project: Nuxeo Enterprise Platform
> Issue Type: User story
> Reporter: Thierry Delprat
> Assignee: Thierry Delprat
> Priority: Major
> Fix For: 5.2 M4
>
>
> Dev Story :
> =======
> New transformers :
> -------------------------
> There are pleinty of command line tools that can be used to handle
> transformations.
> I would to have a easy and possibily cross platform way to integrate these
> third party tools as Nuxeo transformers.
> Tranform blobs and Documents :
> ------------------------------------------
> API should expose an API to handle transformation from a DocumentModel.
> Event is reading blob from a DocumentModel is not the only use case, this is
> a main use case.
> Cache management :
> ----------------------------
> I don't want to handle cache "by hand" at application level. Transformation
> service should deal with that.
> Implementation Notes :
> ==============
> New transformers plugins :
> ----------------------------------
> Some addons inlcude dedicated transformers :
> - Any2Html for HTML preview
> - Picture transformers for PictureBook and Tiling
> - Base class for CommandLine based transformers
> - Zip2Text
> => generic transformers should be part of global plugins
> - this will improve the default transformers set
> - this will make configuration more centralized
> Cache management :
> ----------------------------
> New Addons working with transformers have to handle caching.
> This caching is handled at application level.
> => This would be far mor efficient to have a cache management at transformer
> level
> ==> This requires some improvement of Transformer API
> - input API should contain needed information to generate a cache key
> - input API should contain a way to ask for cache invalidation (ie : fresh
> transform)
> - output API should include API about cache status
> API :
> ------
> Titling include a ImageResource API for wrapping a Blob or a Blob in a
> DocumentModel.
> This includes cache key management.
> We should leverage this to make a TransformerResource.
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