[jira] [Created] (OAK-12157) Migrate oak-segment-tar Guava-shim caches to Oak Cache API

["Rishabh Daim (Jira)" <ji...@apache.org>]

Rishabh Daim created OAK-12157:
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             Summary: Migrate oak-segment-tar Guava-shim caches to Oak Cache API
                 Key: OAK-12157
                 URL: https://issues.apache.org/jira/browse/OAK-12157
             Project: Jackrabbit Oak
          Issue Type: Sub-task
            Reporter: Rishabh Daim
            Assignee: Rishabh Daim


Migrate the Guava-shim-based caches in oak-segment-tar from CacheBuilder to OakCacheBuilder.

  Changes:
  - SegmentCache — CacheBuilder.newBuilder() → OakCacheBuilder.newBuilder(); Cache → OakCache; Guava RemovalCause → OakRemovalCause; inner Stats class: convert OakCacheStats → Guava shim CacheStats in
  getCurrentStats() (Guava return type kept until TASK-16)
  - RecordCache — CacheBuilder.newBuilder() → OakCacheBuilder.newBuilder(); Cache → OakCache; Guava Weigher → OakWeigher
  - CacheWeights — Weigher → OakWeigher
  - CachingSegmentReader — update cache type references
  - Update callers catching ExecutionException to handle CompletionException/RuntimeException

  Acceptance criteria:
  - SegmentCacheTest passes
  - Segment unload timing and eviction callback timing unchanged



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