[jira] [Created] (FLINK-3524) Provide a JSONSerialisationSchema in the kafka connector package

["Robert Metzger (JIRA)" <ji...@apache.org>]

Robert Metzger created FLINK-3524:
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             Summary: Provide a JSONSerialisationSchema in the kafka connector package
                 Key: FLINK-3524
                 URL: https://issues.apache.org/jira/browse/FLINK-3524
             Project: Flink
          Issue Type: Improvement
          Components: Kafka Connector
            Reporter: Robert Metzger


(I don't want to include this into 1.0.0)

Currently, there is no standardized way of parsing JSON data from a Kafka stream. I see a lot of users using JSON in their topics. It would make things easier for our users to provide a serializer for them.

I suggest to use the jackson library because we have that aready as a dependency in Flink and it allows to parse from a byte[].

I would suggest to provide the following classes:
 - JSONSerializationSchema()
 - JSONKeyValueSerializationSchema(bool includeMetadata)

The second variant should produce a record like this:
{code}
{"key": "keydata",
"value": "valuedata",
"metadata": {"offset": 123, "topic": "<topic>", "partition": 2 }
{code}



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