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https://issues.apache.org/jira/browse/NIFI-259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15135538#comment-15135538
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ASF subversion and git services commented on NIFI-259:
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Commit 4df65121263fe9b3e488f81ce50d8f96e3643c21 in nifi's branch
refs/heads/master from [~aldrin]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=4df6512 ]
Merge branch 'NIFI-259'
> Framework should offer Processors/extensions a way to manage simple state
> -------------------------------------------------------------------------
>
> Key: NIFI-259
> URL: https://issues.apache.org/jira/browse/NIFI-259
> Project: Apache NiFi
> Issue Type: Sub-task
> Components: Core Framework
> Reporter: Joseph Witt
> Assignee: Mark Payne
> Fix For: 0.5.0
>
> Attachments: error-message.png
>
>
> It is not uncommon for processors to need managed state which persists
> across restarts. One good example of this is the GetHTTP processor which
> needs to save state of the last cache/e-tag information it received from the
> server it interacts with so that it can avoid constantly pulling an unchanged
> resource.
> Rather than making processors roll their own persistant state management
> perhaps we can offer something to them via the ProcessContext which will
> allow them to save simple primitive values and limited length Strings which
> are local to that node and which are local to that processor only.
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