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