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https://issues.apache.org/jira/browse/APEXMALHAR-2447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Velineni Lakshmi Prasanna updated APEXMALHAR-2447:
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Description: AbstractFileInputOperator scans a directory for files and
outputs the file contents. However, when the directory is empty nothing is
sent. A downstream operator may want some basic information that the input
directory is scanned, so for example, it can create an output folder. Add a
notification to the operator when the directory is scanned for the first time.
An implementation, for example, can use this notification to send a control
tuple with the directory path notifying the downstream that the directory has
been visited. (was: AbstractFileInputOperator scans a directory for files and
outputs the file contents. However when the directory is empty nothing is sent.
A downstream operator may want some basic information that the input directory
is scanned, so for example, it can create an output folder. Add a notification
to the operator when the directory is scanned for the first time. An
implementation, for example, can use this notification to send a control tuple
with the directory path notifying the downstream that the directory has been
visited.)
> No indication from AbstractFileInputOperator when directory is empty
> --------------------------------------------------------------------
>
> Key: APEXMALHAR-2447
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2447
> Project: Apache Apex Malhar
> Issue Type: Improvement
> Reporter: Velineni Lakshmi Prasanna
> Assignee: Velineni Lakshmi Prasanna
> Priority: Minor
>
> AbstractFileInputOperator scans a directory for files and outputs the file
> contents. However, when the directory is empty nothing is sent. A downstream
> operator may want some basic information that the input directory is scanned,
> so for example, it can create an output folder. Add a notification to the
> operator when the directory is scanned for the first time. An implementation,
> for example, can use this notification to send a control tuple with the
> directory path notifying the downstream that the directory has been visited.
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