Chia-Ping Tsai created KAFKA-20958:
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Summary: Introduce internal accessor pattern to encapsulate
cross-package APIs
Key: KAFKA-20958
URL: https://issues.apache.org/jira/browse/KAFKA-20958
Project: Kafka
Issue Type: Improvement
Reporter: Chia-Ping Tsai
Assignee: Chia-Ping Tsai
Currently, to allow cross-package instantiation or state access for internal
Kafka components, we either:
# Leak internal classes (like Time) in public constructors.
# Expose properties as protected.
We should introduce the Internal Accessor / Factory Pattern (using
package-private scopes and `@InterfaceAudience.Private` helper classes) to
cleanly encapsulate these.
Subsequently, we will deprecate the leaked public constructors/methods to
ensure we can remove them in 5.0.
related discussion:
https://lists.apache.org/thread/1kmyqody36dhnzj5ph858zsfpl4qhm7l
https://github.com/apache/kafka/pull/21337#discussion_r3574009798
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