tree c0ee57bd4348c0f1ee802536ec194f24736ced61
parent 4976c3e7d428f4e948e8a5772e0f60711151e270
author JiangHaiting <jianghaiting@apache.org> 1641866796 +0800
committer GitHub <noreply@github.com> 1641866796 +0800
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Optimize TopicPolicies#maxConsumersPerSubscription with HierarchyTopicPolicies (#13548)

This is one of the serial topic policy optimization with HierarchyTopicPolicies.

Update topic policy with HierarchyTopicPolicies comes with these benefits:

All topic policy related settings will goes into AbstractTopic#topicPolicies, easier to understand, check, review, and modify.
Unify policy update to AbstractTopic. And easier to find which policy is not applied to non-persistent topic yet. And we can easily add support for it.
Unify policy value with 3 level settings (topic/namespace/broker), and priority with topic > namespace > broker. And it's easier to find which level settings is missing.
All values are updated at creation or by trigger. We can save some resource to update it or recalculate each time we use it.
etc.