Web feature service (WFS) locking support based on light-weight locking model in the database

摘要

Locking feature instances in a web feature service by processing a web feature service data transformation request; identifying a table associated with the web feature service data transformation request from a feature type identified in the request; determining if the table associated with the web feature service data transformation request is enabled for long transaction locking; and, if the table is long transaction lock enabled, locking at least one feature instance associated with a filter condition of the web feature service data transformation request by associating a session transferable identifier with the at least one feature instance and identifying the client session as owner of the session transferable identifier; and enabling a transfer of the long transaction lock to another client session in response to a lock transfer request from the another client session that references the session transferable identifier in a web feature service transaction request.