Guozhang Wang created KAFKA-3794:
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Summary: Add Stream / Table prefix in print functions
Key: KAFKA-3794
URL: https://issues.apache.org/jira/browse/KAFKA-3794
Project: Kafka
Issue Type: Bug
Components: streams
Reporter: Guozhang Wang
Currently the KTable/KStream.print() operator will print the key-value pair as
it was forwarded to this operator. However, if there are multiple operators in
the topologies with the same {{PrintStream}} (e.g. stdout), their printed
key-value pairs will be interleaving on that stream channel.
Hence it is better to add a prefix for different KStream/KTable.print
operators. One proposal:
1) For KTable, it inherits a table name when created, and we can use that name
as the prefix as {{[table-name]: key, value}}.
2) For KStream, we can overload the function with an additional "name"
parameter that we use as the prefix; if it is not specified, then we can use
the parent processor node name, which has the pattern like
{{KSTREAM-JOIN-suffix_index}}.
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