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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2666) Allow custom Timestamp extractors for Flink sources
Date Thu, 01 Oct 2015 15:39:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14939988#comment-14939988
] 

ASF GitHub Bot commented on FLINK-2666:
---------------------------------------

Github user gyfora commented on the pull request:

    https://github.com/apache/flink/pull/1201#issuecomment-144765512
  
    Looks good, my only concern is that it is getting messy with a new Timestamp extractor
interface as we already have one simply called Timestamp in the windowing.helper package.


> Allow custom Timestamp extractors for Flink sources
> ---------------------------------------------------
>
>                 Key: FLINK-2666
>                 URL: https://issues.apache.org/jira/browse/FLINK-2666
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Gyula Fora
>            Assignee: Aljoscha Krettek
>            Priority: Minor
>
> When record timestamps are turned on users currently have 2 ways of specifying record
timestamps.
> They can either chose to automatically attach ingress timestamps (and send watermarks),
or custom implement a sourcefunction to manually assign timestamps and emit watermarks.
> It would be good if users could define a Timestamp extractor function that will attach
a timestamp for every record generated using any of the current Flink sources. Also watermarks
for these records should be automatically generated based on the extracted event time (assuming
monotonicity per source) periodically.



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