Add grpc circuit breaker utility using interceptors

[pavan-traceable]

Description

Added grpc utility to support circuit breaker for slow and failure calls

Testing

Tested changes on sandbox environment using this utility.

[github-actions]

Test Results

90 tests  +7   90 ✅ +7   25s ⏱️ +3s
16 suites +2    0 💤 ±0 
16 files   +2    0 ❌ ±0 

Results for commit 5f3b287. ± Comparison against base commit 20402cf.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 33.48214% with 149 lines in your changes missing coverage. Please review.

Project coverage is 60.44%. Comparing base (20402cf) to head (5f3b287).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/resilience/ResilienceCircuitBreakerProvider.java	2.22%	44 Missing ⚠️
...tbreaker/grpcutils/CircuitBreakerConfigParser.java	0.00%	43 Missing ⚠️
...ence/ResilienceCircuitBreakerRegistryProvider.java	5.55%	17 Missing ⚠️
...ls/resilience/ResilienceCircuitBreakerFactory.java	0.00%	12 Missing ⚠️
...esilience/ResilienceCircuitBreakerInterceptor.java	81.03%	7 Missing and 4 partials ⚠️
...breaker/grpcutils/CircuitBreakerConfiguration.java	0.00%	9 Missing ⚠️
...ience/ResilienceCircuitBreakerConfigConverter.java	66.66%	6 Missing and 1 partial ⚠️
...itbreaker/grpcutils/CircuitBreakerInterceptor.java	25.00%	3 Missing ⚠️
...uitbreaker/grpcutils/CircuitBreakerThresholds.java	78.57%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##               main      #68       +/-   ##
=============================================
- Coverage     71.80%   60.44%   -11.36%     
- Complexity      173      193       +20     
=============================================
  Files            26       35        +9     
  Lines           532      756      +224     
  Branches         26       45       +19     
=============================================
+ Hits            382      457       +75     
- Misses          126      269      +143     
- Partials         24       30        +6     

Flag	Coverage Δ
unit	60.44% <33.48%> (-11.36%)	⬇️

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[aaron-steinfeld]

Thanks for working through all the comments on this one - this will be a nice add!
Left a couple minor nits that are just style prefs, but otherwise approved.

[aaron-steinfeld]

nit

Suggested change

	.build(
	new CacheLoader<>() {
	@Override
	public Optional<CircuitBreaker> load(String key) {
	return buildNewCircuitBreaker(key);
	}
	});
	.build(CacheLoader.from(this::buildNewCircuitBreaker));

[pavan-traceable]

Will fix in immediate PR, merging this

[pavan-traceable]

https://github.com/hypertrace/java-grpc-utils/pull/69/files Please review

[aaron-steinfeld]

nit - can do shared things at the end once you've built the circuit breaker

     return Optional.ofNullable(circuitBreakerConfigMap.get(circuitBreakerKey))
        .map(config -> circuitBreakerRegistry.circuitBreaker(circuitBreakerKey, config))
        .or(() -> {
              if (defaultEnabled) {
                return Optional.of(circuitBreakerRegistry.circuitBreaker(circuitBreakerKey));
              } else {
                return Optional.empty();
              }
            })
        .map(this::attachListeners); // assuming attach listeners can be made fluent and return the circuitbreaker