rayluoluo opened a new pull request, #23774:
URL: https://github.com/apache/pulsar/pull/23774
[improve][broker] Improve the extensibility of the
TopicBundleAssignmentStrategy interface class (#23773)
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<!-- Either this PR fixes an issue, -->
Fixes #23773
<!-- If the PR belongs to a PIP, please add the PIP link here -->
PIP: #19806
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### Motivation
<!-- Explain here the context, and why you're making that change. What is
the problem you're trying to solve. -->
In the NamespaceBundleFactory and TopicBundleAssignmentStrategy
implementation classes, the implementation of making the partition assignment
strategy pluggable has a bad taste of scatter-point modification and the design
that violates the open-close principle. It is recommended that the
implementation be fixed.
### Modifications
<!-- Describe the modifications you've done. -->
The implementation of the `NamespaceBundleFactory#getLongHashCode` method be
moved to the implementation class of the interface
`TopicBundleAssignmentStrategy`. Therefore, we may add a new method `long
getHashCode(String name)` to the `TopicBundleAssignmentStrategy` interface
class. When the `NamespaceBundleFactory#getLongHashCode` method invokes
`getHashCode`, `NamespaceBundles` is unaware of the specific hash algorithm
implementation.
### Verifying this change
- [X] Make sure that the change passes the CI checks.
This change is already covered by existing tests, such as
*TopicBundleAssignmentStrategyTest#testStrategyFactory*, and added tests and
can be verified as follows:
*TopicBundleAssignmentStrategyTest*
- *TopicBundleAssignmentStrategyTest#testRoundRobinBundleAssigner：A new
partition assignment strategy algorithm `RoundRobinBundleAssigner` is
customized and the `TopicBundleAssignmentStrategy` interface is implemented.
Only the interfaces in `TopicBundleAssignmentStrategy` need to be implemented.
It's not needed to modify the interface implementation of other classes. The
open and closed principles are met.*
### Does this pull request potentially affect one of the following parts:
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- [ ] Dependencies (add or upgrade a dependency)
- [ ] The public API
- [ ] The schema
- [ ] The default values of configurations
- [ ] The threading model
- [ ] The binary protocol
- [ ] The REST endpoints
- [ ] The admin CLI options
- [ ] The metrics
- [ ] Anything that affects deployment
### Documentation
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- [X] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->
### Matching PR in forked repository
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