Allow customizing the MeterIdPrefix of CircuitBreaker metrics(#5318)

[Kyurenpoto]

Motivation:

To resolve #5318:

Currently, the metric name and tags of circuit breaker metrics are determined by MetricCollectingCircuitBreakerListener.metricsOf(String circuitBreakerName). The resulting meter ID always contains the name of the circuit breaker.

When a user uses a CircuitBreakerMapping such as perHost(), each circuit breaker will have its own metrics under its own meter ID prefix, which may or may not be something a user desires.

We could allow a user to specify a function that allows a user to choose the MeterIdPrefix of the circuit breaker so that a user can use the same MeterIdPrefix while using per-host circuit breakers.

Modifications:

• Extract MetricTagBuilder
• Add constructor to specify custom tags

Result:

We could allow a user to specify the tags that allows a user to choose the MeterIdPrefix of the circuit breaker.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.68%. Comparing base (3f54be0) to head (d46f1e8).
Report is 198 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5383      +/-   ##
============================================
- Coverage     73.94%   73.68%   -0.27%     
- Complexity    20104    20107       +3     
============================================
  Files          1730     1741      +11     
  Lines         74161    74366     +205     
  Branches       9465     9481      +16     
============================================
- Hits          54841    54799      -42     
- Misses        14844    15033     +189     
- Partials       4476     4534      +58     

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[github-actions]

🔍 Build Scan® (commit: d46f1e8)

Job name	Status	Build Scan®
build-windows-latest-jdk-19	✅	https://ge.armeria.dev/s/bz2hrv6in6pco
build-self-hosted-unsafe-jdk-8	✅	https://ge.armeria.dev/s/bjhvdovfzd2wy
build-self-hosted-unsafe-jdk-19-snapshot-blockhound	✅	https://ge.armeria.dev/s/6nx4zh4ddc5x2
build-self-hosted-unsafe-jdk-17-min-java-17-coverage	✅	https://ge.armeria.dev/s/ih3ahhqpc65dm
build-self-hosted-unsafe-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/ku36hraq74a6a
build-self-hosted-unsafe-jdk-17-leak	✅	https://ge.armeria.dev/s/un6d7azjvzgvs
build-self-hosted-unsafe-jdk-11	✅	https://ge.armeria.dev/s/4xqkwcjdn5jj4
build-macos-12-jdk-19	✅	https://ge.armeria.dev/s/swqbd2lpz6myy

[minwoox]

I left my opinion here: #5318 (comment)

[trustin]

I think we should go with Micrometer Observation as described at #5736. Sorry but let me close this. 🙇