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From "Ross Gardler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COMDEV-6) permit do_io_write after open_read to enable atomic overwrite of an existing object
Date Tue, 08 Dec 2009 10:35:18 GMT

    [ https://issues.apache.org/jira/browse/COMDEV-6?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12787398#action_12787398
] 

Ross Gardler commented on COMDEV-6:
-----------------------------------

This is not intended for the ComDev isue tracker. If you let us know which project it belongs
to we'd be happy to move it for you.

> permit do_io_write after open_read to enable atomic overwrite of an existing object
> -----------------------------------------------------------------------------------
>
>                 Key: COMDEV-6
>                 URL: https://issues.apache.org/jira/browse/COMDEV-6
>             Project:  	 Community Development 
>          Issue Type: New Feature
>            Reporter: John Plevyak
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> 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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