Extensible event-action system

Details Extensible event-action system Extensible event-action system

G - Physics

06

F

G06F 9/44 (2006.01) G06F 9/00 (2006.01)

Patent

CA 2065521

29 Abstract of the Disclosure An extensible event-action system which permits a user of a computer system to specify actions to be performed in response to combinations of user-defined and/or system events. A user-defined event takes place when a process sends an announce message to a daemon process in the system. The system de- fined events include clock events, file system events, machine events, process events, user events, and terminal events. The daemon process maintains ta- bles of event definitions and event-action specifications which specify a com- bination of events and an action. The daemon process further keeps track of the occurrence of system- and user-defined events and performs the action specified in an event-action specification when the events specified therein have occurred. The actions may include commands which affect the event definition and event-action specification tables. Events are defined in terms of objects and attributes. An event has occurred when an attribute of an instance of an object is set to a value which is specified for the attribute. The attributes may be predefined or may be user-defined. Values are set in predefined attributes by system defined events and in user-defined attributes by the announce message.

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