Object state change and history management mechanism

A system having a manager for managing changes in state of interrelated objects, the system comprising:

• one or more source objects having a state representative of a physical state of a system;
• one or more methods that update the source objects responsive to changes in the state of the system;
• one or more change notifiers that communicate the changes;
• a view materializer comprising one or more input objects capable of receiving change notification from source objects and further comprising one or more view objects that are a function of the input objects and that emit change notification, such that the change notification may be received by one or more target objects;
• and
• a quality of service parameter and wherein the notifier communicates changes based on the quality of service parameter.

A system comprising:

• a plurality of processor elements;
• a network coupling the processor elements to each other;
• a plurality of information sources coupled to the processor elements;
• a source object having a state representative of information provided by the information sources;
• a service running on at least one of the processor elements for applying methods to update the state of the source object responsive to changes in information provided by the information sources;
• a view materializer comprising an input objects capable of receiving change notification from the source object and further comprising a view object that is a function of the input object and that emits change notification, such that the change notification may be received by a target object;
• a notifier that implements the change notification, wherein the notifier communicates changes in data contained in a source object to a target object;
• and
• a quality of service parameter and wherein the notifier communicates changes based on the quality of service parameter.

A state change manager for managing changes in state of interrelated objects comprising:

• a source object having a state representative of a physical state of a system;
• a method that updates the source object responsive to changes in the state of the system;
• a change log that records changes to the source object and associates such changes with a chronologically related identifier;
• a change notifier that communicates the changes to a view materializer;
• a view materializer comprising an input object that receives change notification from source objects via the change the change notifier and further comprising a view object that is a function of the input object and that emits change notification, such that the change notification may be received by a target object;
• and
• a quality of service parameter and wherein the change notifier communicates changes based on the quality of service parameter.

A method of synchronizing the state of a source object and a target object which is a function of at least one source object, comprising:

• logging changes in state of a source object in format specifying a method applied to the source object to change its state, and chronological identifier;
• requesting to synchronize the state of the target object with the source object at a desired point in time, wherein requesting includes identifying the target object and a desired quality of service;
• and
• using logged methods applied to the source object to change the state of the target object to synchronize the state of the target object with the state of the source object at the desired point in time.

A system comprising:

• a plurality of source objects containing information;
• a first view object which is a function of the information contained in the source object;
• a second view object which is a function at least in part of the view object;
• and
• a notifier that communicates changes in the data contained in the source objects to the first view object such that the changes are applied to the first view object, and that communicates changes in the data contained in the first view object to the second view object to bring the second view object to a desired state in time, wherein the notifier notifies changes based on a quality of service parameter.

A computerized method, comprising:

• updating at least one object by a client object;
• intercepting each act of updating by at least one materializer;
• and
• restoring a functional relationship between another object and the at least one object, wherein the functional relationship is selected from a group consisting of data reduction, data formula translation, and data elimination, and wherein the act of restoring is executed after the act of intercepting.

A data structure, comprising:

• a state copier to change an initial state of a target to a current state;
• a history that extends the state copier to bring the target from one time to another time;
• a notifier that selectively subscribes to change notifications of a source;
• and
• a history notifier that extends the history and the notifier to change the target from a past state to a current state of the source, and wherein the history notifier keeps the target current with the source.