since r38650, isTempObject() returns True for asContext() result, so now the condition to switch cache storage is not isTempObject() result but getOriginalDocument() result. this change will solve recent failures of testERP5Web.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@39181 20353a03-c40f-0410-a6d1-a30d3c3de9de

getTransactionalVariable has always been implemented to return a global
cache object (1 per thread): old implementation used the given context only to
have access to the portal.

So we enforce this with a warning to make sure people don't expect retrieving
1 cache object per given context.

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Split IConvertable to IFormatConvertable and IConvertable. Move implementation from abstract Document class to interface (IConvertable) implementation. Adjust interface doc strings accordingly. 

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The cached value need to be the image itself, not only image content.
The work around md5 hashing calculation is still on going



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 * if cached value is a tuple as it was before refactoring
   http://svn.erp5.org?rev=35216&view=rev
   raise a KeyError to invalidate this cache entry and force
   calculation of a new conversion


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35340 20353a03-c40f-0410-a6d1-a30d3c3de9de

should be hashed using hashPdataObject instead of md5.new(data.data)


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public methods:
  - getConversion
  - getConversionMd5
  - getConversionDate
  - getConversionSize




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* force conversion into string for Pdata objects (File, Image, OOoDocument, ...).


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34914 20353a03-c40f-0410-a6d1-a30d3c3de9de

* Compute new cache key with revision (incremental counter based on
edit transtions of edit_workflow)


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Made the key more explicit with shared code througth a private method. Use UID instead of path. (will be replaced by uuid generated some day)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31662 20353a03-c40f-0410-a6d1-a30d3c3de9de

getConversion return a list of two values, so previous code ("return
len(self.getConversion(**kw))") always return 2.
Now the len of the data is returned.
In case of images, data is an OFSImage object. But OFSImage objects support
len, so it works also in case of images.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31542 20353a03-c40f-0410-a6d1-a30d3c3de9de

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web_page_module where served using a different cache. This was due to the fact
that web_page.getPath() was used as key to find the corresponding cache (and
the path of a web page is not the same through web_page_module and through a
web_site). Now, orginal_path is stored on web_section and used
instead of path. This permit to served cached web_page throught web_page_module
or throught a web_site.


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