Method getFromCacheByCV

db/revision_cache_lru.go:237–260

(ctx context.Context, docID string, cv *Version, collectionID uint32, loadCacheOnMiss bool, includeDelta bool, loadBackup bool)

}

func (rc *LRURevisionCache) getFromCacheByCV(ctx context.Context, docID string, cv *Version, collectionID uint32, loadCacheOnMiss bool, includeDelta bool, loadBackup bool) (DocumentRevision, error) {
	value := rc.getValueByCV(ctx, docID, cv, collectionID, loadCacheOnMiss)
	if value == nil {
		return DocumentRevision{}, nil
	}

	// for CV pathway we respect the loadBackup flag passed in
	docRev, cacheHit, err := value.load(ctx, rc.backingStores[collectionID], includeDelta, loadBackup)
	rc.statsRecorderFunc(cacheHit)

	if err != nil {
		rc.removeValue(value, collectionID) // don't keep failed loads in the cache
	}

	if !cacheHit && err == nil {
		// cache miss so we had to load doc, increment memory count
		rc.incrRevCacheMemoryUsage(ctx, value.getItemBytes())
		// check for memory based eviction
		rc.revCacheMemoryBasedEviction(ctx)
		rc.addToRevMapPostLoad(ctx, docID, docRev.RevID, docRev.CV, collectionID)
	}

	return docRev, err
}

// Attempts to retrieve the active revision for a document from the cache.  Requires retrieval
// of the document from the bucket to guarantee the current active revision, but does minimal unmarshalling