Aljoscha Krettek created FLINK-6323:
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Summary: 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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