Method backupRevisionJSON

db/revision.go:298–316

Makes a backup of revision body for use by in-flight replications requesting an old revision (for clients not supporting replacementRevs)

(ctx context.Context, docId, oldRev string, oldBody []byte, channels base.Set, deleted bool)

// Makes a backup of revision body for use by in-flight replications requesting an old revision (for clients not supporting replacementRevs)
func (db *DatabaseCollectionWithUser) backupRevisionJSON(ctx context.Context, docId, oldRev string, oldBody []byte, channels base.Set, deleted bool) {
	if db.deltaSyncEnabled() && db.deltaSyncRevMaxAgeSeconds() > 0 {
		// See postWriteUpdateHLV - we're writing a CV and RevTreeID backup there to support delta sync
		return
	}

	if !db.storeLegacyRevTreeData() {
		// Not storing legacy revtree data - nothing to do
		return
	}

	// skip backup if this was a deletion
	if len(oldBody) == 0 {
		return
	}

	// store or refresh the old document revision by revtree ID for in-flight replications
	_ = db.refreshOldRevisionJSON(ctx, docId, oldRev, oldBody, db.oldRevExpirySeconds(), channels, deleted)
}

// setOldRevisionJSONBody stores the raw JSON body of a revision that has been archived to a separate doc.
func (db *DatabaseCollectionWithUser) setOldRevisionJSONBody(ctx context.Context, docid string, rev string, body []byte, expiry uint32) error {