Class ConcurrencyVersionRetrieval

public class ConcurrencyVersionRetrieval
extends ModelRetrieval

Used to form the concurrencyVersion retrieval clause of a Model query. Create through ModelQuery. When ConcurrencyVersionRetrieval query component is provided during read operations, retrieved models along-with their child level models will be populated with a transient field called ConcurrencyVersion that contains Long epoch value derived from LastModifiedDate(for top-level models) or LevelModifedDate(child-level models). ConcurrencyVersion field represents the version of the model that was read from database. Whenever an update is performed on a model with ConcurrencyVersion set, a check for concurrencyVersion is done before writing to avoid any updates on stale versions of that model in database.