chore(cache): start once for service endpoint cache

[Jacobbrewer1]

Describe your changes

This pull request includes updates to improve thread safety, error handling, and type assertion practices across multiple files. The most significant changes involve introducing a sync.Once mechanism to ensure the Start method is only executed once in ServiceEndpointHashBucket, improving error handling in the same method, and updating type assertion syntax for consistency.

Thread safety improvements:

• Added a sync.Once instance (startOnce) to ServiceEndpointHashBucket to ensure the Start method is executed only once. This prevents potential race conditions when initializing the hash bucket. (cache/service_endpoint_hash_bucket.go, cache/service_endpoint_hash_bucket.goL29-R39)

Error handling enhancements:

• Refactored the Start method in ServiceEndpointHashBucket to use startErr for consistent error propagation within the sync.Once block. This ensures that errors encountered during initialization are properly returned. (cache/service_endpoint_hash_bucket.go, [1] [2]

Type assertion consistency:

• Updated type assertions for FixedHashBucket, ServiceEndpointHashBucket, and dedupeHandler to use the (*Type)(nil) pattern instead of new(Type). This is a more idiomatic approach in Go for ensuring interface compliance. (cache/fixed_hash_bucket.go, [1]; cache/service_endpoint_hash_bucket.go, [2]; logging/dedupe_handler.go, [3]

[Copilot]

Pull Request Overview

This PR improves the thread safety and error handling for the service endpoint cache while standardizing type assertions across several files.

• Introduces a sync.Once mechanism and improved error propagation in the Start method of ServiceEndpointHashBucket.
• Updates type assertions in FixedHashBucket, ServiceEndpointHashBucket, and dedupeHandler to the idiomatic (*Type)(nil) pattern.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
logging/dedupe_handler.go	Updated type assertion for dedupeHandler to the idiomatic pointer pattern.
cache/service_endpoint_hash_bucket.go	Added sync.Once to ensure Start is executed only once with enhanced error handling.
cache/fixed_hash_bucket.go	Updated type assertion for FixedHashBucket to the idiomatic pointer pattern.

[github-actions]

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