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Posted to issues@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2017/04/20 06:07:04 UTC

[jira] [Closed] (FLINK-6323) Add new Sink interface with access to more meta data

     [ https://issues.apache.org/jira/browse/FLINK-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek closed FLINK-6323.
-----------------------------------
    Resolution: Duplicate

> Add new Sink interface with access to more meta data
> ----------------------------------------------------
>
>                 Key: FLINK-6323
>                 URL: https://issues.apache.org/jira/browse/FLINK-6323
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>            Reporter: Aljoscha Krettek
>
> The current {{SinkFunction}} cannot access the timestamps of elements which resulted in the (somewhat hacky) {{FlinkKafkaProducer010}}. Due to other limitations {{GenericWriteAheadSink}} is currently also a {{StreamOperator}} and not a {{SinkFunction}}.
> We should add a new interface for sinks that takes a context parameter, similar to {{ProcessFunction}}. This will allow sinks to query additional meta data about the element that they're receiving. 
> This is one ML thread where a user ran into a problem caused by this: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Why-I-am-getting-Null-pointer-exception-while-accessing-RuntimeContext-in-FlinkKafkaProducer010-td12633.html#a12635



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