Method for improving temporal consistency and snapshot recency in a monitored real-time software-reporting-application architecture
View Patent ↗An object-oriented software application is provided for receiving updates that change state of an object model and reporting those updates to requesting users. The application includes a database application for storing data; an object model driver for writing updates into the database; a notification system for notifying about the updates; and, a plurality of external monitors for reading the updates. In a preferred embodiment the object model produces multiple temporal snapshots of itself in co-currency with received events, each snapshot containing associated update information from an associated event and whereupon at the time of occurrence of each snapshot coinciding with an event the notification system notifies the appropriate external monitor or monitors, which in turn access the appropriate snapshot, performs calculations thereupon if required and renders the information accessible to the users.
1. A processing system including a non-transitory machine-readable medium having stored thereon computer-executable code, the computer code comprising:
an object model;
a data repository storing change events associated with objects in the object model at a first frequency;
a monitor reading the objects and creating periodic snapshots at a second frequency set to be higher than the first frequency;
one or more listener modules pre-programmed to view successive ones of the periodic snapshots; and
user-activated monitors accessing the one or more listener modules;
wherein users are informed through the user-activated monitors of values and changes in values of the objects the one or more listener modules are programmed to listen for.
2. The system of claim 1 wherein the change events are changes to properties of the object model and the object model represents a real-time event-driven system.
3. The system of claim 1 wherein the one or more listener modules are Java language modules.
4. The system of claim 1 wherein all snapshots are maintained in object history until no longer needed.
5. A method for updating users concerning changes to objects in an object model, comprising steps of:
(a) writing object changes to a data repository;
(b) monitoring the model;
(c) producing sequential snapshots of the model, the frequency of the sequential snapshots set to be higher than an expected frequency of writing in step (a);
(d) monitoring the snapshots for change associated with the objects in the model by individual listener modules; and
(e) providing values and changes in value of the specific one of the objects to individual monitors.
6. The method of claim 5 wherein the objects are part of the object model representing a real-time event-driven system.
7. The method of claim 5 wherein the listener modules are Java language modules.
8. The method of claim 5 wherein all snapshots are maintained in object history until no longer needed.
9. The method of claim 5 further comprising the step wherein each of the individual monitors adds or removes listeners for any object or group of objects in the object model.