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From "John Plevyak (JIRA)" <j...@apache.org>
Subject [jira] Created: (COMDEV-6) permit do_io_write after open_read to enable atomic overwrite of an existing object
Date Mon, 07 Dec 2009 21:16:21 GMT
permit do_io_write after open_read to enable atomic overwrite of an existing object
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                 Key: COMDEV-6
                 URL: https://issues.apache.org/jira/browse/COMDEV-6
             Project:  	 Community Development 
          Issue Type: New Feature
            Reporter: John Plevyak


A number of more stateful protcols would benefit from the ability to atomically replace an
existing object.
By adding the ability for non-HTTP protocols to retrieve a block of untyped header information
from the
CacheVConnection and the ability to convert a read into a write (with an error if it is overwritten
by someone
else) we can handle such protocols.

Both of these ability are already present in the HTTP cache codepaths so generalizing and
exporting them
seems logical.

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