Fecha de publicación: 25/08/2020 Fuente: WIPO "apis" Methods and apparatus for a transactional watch mechanism are disclosed. A distributed system includes a state manager coordinating access to a registry. In response to a watch establishment request specifying target elements of the registry for which update notifications are to be provided and an indication of a notification destination, the state manager determines a watch establishment timestamp, and initiates a sequence of asynchronous update notifications to the destination, corresponding to each update to a target element completed after the watch is established. The notifications are provided in the order in which the corresponding updates are applied. The sequence includes exactly one update notification for a given update and excludes update notifications for elements of the registry other than the specified target elements.