Chia-Ping Tsai created KAFKA-10412:
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Summary: Deprecate all setters of Headers
Key: KAFKA-10412
URL: https://issues.apache.org/jira/browse/KAFKA-10412
Project: Kafka
Issue Type: Improvement
Reporter: Chia-Ping Tsai
Assignee: Chia-Ping Tsai
_Headers is a part of public APIs but the usage of Headers is a bit chaos to
users._
# it has a lot of abstract setters so users have to implement all of them.
However, we never call user-defined setters in production.
# it is not thread-safe so we have to call "setReadOnly" to make data
consistency.
# "setReadOnly" is not a part of public API so users have no idea about the
"thread-safe" of Headers
We can't improve Headers right now by reason of deprecation cycles. This KIP
plans to deprecate and offer default implementation
(_java_.lang.UnsupportedOperationException) to all setters of _Headers so we
can cleanup all setters to make it be readonly in next major and users are able
to remove all useless implementation from their_ _Headers in this patch._
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