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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3405) Extend NiFiSource with interface StoppableFunction
Date Mon, 30 May 2016 17:38:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15306839#comment-15306839

ASF GitHub Bot commented on FLINK-3405:

Github user StephanEwen commented on the pull request:

    close() is called by all operators when the operator finishes without an exception of
canceling. Have a look at the AbstractUDFStream
    Stop() is thought to be merely a trigger to make an unbounded source stop its unbounded
loop. After that, it should finish like a bounded source, including the close() call.

> Extend NiFiSource with interface StoppableFunction
> --------------------------------------------------
>                 Key: FLINK-3405
>                 URL: https://issues.apache.org/jira/browse/FLINK-3405
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>            Reporter: Matthias J. Sax
>            Assignee: Suneel Marthi
>             Fix For: 1.1.0, 1.0.4
> Nifi source is not stoppable right now. To make it stoppable, is must implement {{StoppableFunction}}.
Implementing method {{stop()}} must ensure, that the source stops receiving new messages from
Nifi and issues a final checkpoint. Afterwards, {{run()}} must return.
> When implementing this, keep in mind, that the gathered checkpoint might later be used
as a savepoint.

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