Method addToRevMapPostLoad

db/revision_cache_lru.go:455–478

addToRevMapPostLoad will generate and entry in the Rev lookup map for a new document entering the cache

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

// addToRevMapPostLoad will generate and entry in the Rev lookup map for a new document entering the cache
func (rc *LRURevisionCache) addToRevMapPostLoad(ctx context.Context, docID, revID string, cv *Version, collectionID uint32) {
	if revID == "" {
		// no revID to map to, exit early
		return
	}
	legacyKey := IDAndRev{DocID: docID, RevID: revID, CollectionID: collectionID}
	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)
	cvElem, cvFound := rc.hlvCache[key]
	_, revFound := rc.cache[legacyKey]
	if !cvFound {
		// 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 rev map
	if !revFound {
		// if not found we need to add the element to the rev lookup (for PUT code path)
		rc.cache[legacyKey] = cvElem
	}
}

// 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) {