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https://issues.apache.org/jira/browse/NIFI-631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943766#comment-14943766
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Mark Payne commented on NIFI-631:
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[~jskora] I needed to have a FetchFile processor for a specific use case that I
had. I went ahead and put that together. The patch is attached here. If you
haven't yet implemented it, then we can just use this one if that works for
you. If you've already got something together then it may help to have my
implementation as a reference anyway. This does not implement ListFile, just
FetchFile.
> Create ListFile and FetchFile processors
> ----------------------------------------
>
> Key: NIFI-631
> URL: https://issues.apache.org/jira/browse/NIFI-631
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Mark Payne
> Assignee: Joe Skora
> Attachments:
> 0001-NIFI-631-Initial-implementation-of-FetchFile-process.patch
>
>
> This pair of Processors will provide several benefits over the existing
> GetFile processor:
> 1. Currently, GetFile will continually pull the same files if the "Keep
> Source File" property is set to true. There is no way to pull the file and
> leave it in the directory without continually pulling the same file. We could
> implement state here, but it would either be a huge amount of state to
> remember everything pulled or it would have to always pull the oldest file
> first so that we can maintain just the Last Modified Date of the last file
> pulled plus all files with the same Last Modified Date that have already been
> pulled.
> 2. If pulling from a network attached storage such as NFS, this would allow a
> single processor to run ListFiles and then distribute those FlowFiles to the
> cluster so that the cluster can share the work of pulling the data.
> 3. There are use cases when we may want to pull a specific file (for example,
> in conjunction with ProcessHttpRequest/ProcessHttpResponse) rather than just
> pull all files in a directory. GetFile does not support this.
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