Method addToHLVMapPostLoad

db/revision_cache_lru.go:481–505

addToHLVMapPostLoad will generate and entry in the CV lookup map for a new document entering the cache

(ctx context.Context, docID, revID string, cv *Version, collectionID uint32)

// addToHLVMapPostLoad will generate and entry in the CV lookup map for a new document entering the cache
func (rc *LRURevisionCache) addToHLVMapPostLoad(ctx context.Context, docID, revID string, cv *Version, collectionID uint32) {
	legacyKey := IDAndRev{DocID: docID, RevID: revID, CollectionID: collectionID}

	if cv == nil {
		// no cv defined to populate lookup map, exit early
		return
	}
	key := IDandCV{DocID: docID, Source: cv.SourceID, Version: cv.Value, CollectionID: collectionID}

	rc.lock.Lock()
	defer rc.lock.Unlock()
	// check for existing value in rev cache map (due to concurrent fetch by rev ID)
	_, cvFound := rc.hlvCache[key]
	revElem, revFound := rc.cache[legacyKey]
	if !revFound {
		// its possible the element has been evicted if we don't find the element above (high churn on rev cache)
		// need to return doc revision to caller still but no need repopulate the cache
		return
	}
	// Check if another goroutine has already updated the cv map
	if !cvFound {
		// if not found we need to add the element to the hlv lookup
		rc.hlvCache[key] = revElem
	}
}

// Remove removes a value from the revision cache, if present.
func (rc *LRURevisionCache) RemoveWithRev(ctx context.Context, docID, revID string, collectionID uint32) {