International Business Machines Corporation

John Shih-Yuan Wang

David Yu Chang

William Hsiao-Yu Ku

Joey Allen Perry

Ajay Reddy Karkala

Ajay Kumar Reddy Karkala

A method, system, and apparatus for correcting a path sequence of an environment variable in a data processing system is provided. In one embodiment, an environment variable manager monitors the data processing system for any change effecting any of the environment variables within the data processing system. If a change effecting the environment variable is detected, the environment variable manager modifies the environment variable to ensure that a proper file is found and used when the file is selected by a user or a running application program. Therefore, when duplicate files exist on the data processing system, the environment variable manager ensures that the incorrect file is not used when the file is requested by a user or a running application program.

System for automatically altering environment variable to run proper executable file by removing references to all except one duplicate file in the path sequence

An event notification channel is provided in a computer controlled object oriented programming system having at least one event supplier object and a plurality of event consumer objects which may be run continuously without interruption and without loss of event notification to any consumer object irrespective of whether any of the consumer objects are off line for filter modification or any other maintenance purpose. The channel transmits events from supplier objects to a plurality of filter objects, each respectively associated with one of the plurality of consumer objects for passing only selected events to the associated consumer object. The system includes a plurality of proxy consumer objects, each associated with one of said consumer objects and between said filter object and said supplier object, whereby said proxy consumer object may receive supplier transmitted events on behalf of its associated consumer object. Thus, where the actual consumer object is off line for filter modification, the proxy will remain in the system and receive the transmitted events.

EVENT NOTIFICATION CHANNEL BETWEEN SUPPLIER AND CONSUMER OBJECTS IN OBJECT ORIENTED PROGRAMMING SYSTEM WITH PROXY CONSUMER OBJECTS TO MAINTAIN UNINTERRUPTED EVENT TRANSMISSION DURING CONSUMER OBJECT OFF LINE MAINTENANCE

A particular node ( ) in a tree structure ( ) defined in a data processing system ( ) may be selected for display as the root node in a tree structure display window ( ). Once a particular node ( ) is selected as the root node, only that portion of the tree structure branching from the selected node ( ) is displayed. The portion of the tree structure ( ) which does not branch from the selected node ( ) is omitted from the display. In addition to the portion of the tree structure branching from the selected node ( ), the system also displays a path map window ( ) containing information about the portion of the tree structure omitted from the display. The path map window ( ) may include a representation of the selected node ( ) and a representation of each ancestor USA node for the selected node, all arranged in the order of the path from the actual root node to the selected node.

Apparatus, method, and program product for facilitating navigation among tree nodes in a tree structure

A method and implementing computer system is provided in which a software debug program is operable to display to a user the flow of a program being debugged. The program flow is illustrated in an example by highlighting, on a program structural representation which is presented on a display screen, the locations of sequential calls within the program being debugged. In one example, a user is selectively able to stop the debug program at any observed step within the displayed flow sequence, to make programming changes or take other action as may be appropriate. In the example, the debug program user is also able to select an automatic sequencing through the flow of a program being developed and to designate a preferred display time duration for each step of the displayed sequencing.

Functional debugger for debugging software programs

Multiple windows are used to represent different branches of a single tree structure. The user can select any tree node and choose &ldquo;start new window&rdquo; action. A visual link is attached from the parent node to the virtual root node of the new subtree window. Within each window, information is displayed in a more manageable manner. The subtrees can be merged back into the parent tree.

Displaying a complex tree structure among multiple windows

The present invention provides a system and method for parsing a constraint language in a computer network. The method includes receiving a constraint string; parsing the constraint string, comprising replacement of valid operators, variables, and values with special characters; and determining if the parsed constraint string indicates the existence of errors in the constraint string. The parser of the present invention is based upon an analysis of the constraint language from which patterns of the language are identified. The easily implemented parser of the present invention is developed based on these patterns. Because the method of the present invention replaces members of a finite set of valid operators, variables, and values, instead of attempting to identify an infinite number of possible errors, it is able to detect all invalid constraints.

Constraint language parser which rejects invalid filter constraint during run time

A method and implementing computer system is provided in which an event/notification channel of a service provider will send a brief &ldquo;notification&rdquo; of an arrival of a full or complete event/notification message which has been received in an event/notification channel, to all relevant pull consumers to inform the consumers that a more detailed message concerning an event being monitored has just arrived. The brief notification can be repeated for a predetermined number of times which is defined by the consumer. After sending a brief notification a predetermined number of times, the event/notification channel assumes that the pull consumer is not operational or no longer interested in the event and the event can then be discarded by the event/notification channel. The brief notification sent to the pull consumers may identify any attachments and the consumer may elect to receive the full event notification message without any or with only selected ones of the attachments. The consumer may direct the service provider to delete the attachments when the full notification is retrieved by the consumer, or the service provider may be programmed to automatically delete any attachments after a certain amount of time following retrieval of the event message by a consumer.

Service application with pull notification

A method and implementing computer system is provided in which a service provider application for a network enables clients to selectively create communication channels and resources within the network. The application is programmed to monitor and examine the created resources for client activation and use of the resources. If no activity or use of the created resource occurs within predetermined client designated time periods, the client is notified and given an opportunity to keep or delete the resource. When the client wishes to delete the resource, or after a predetermined number of notifications to the client without a client response, the resource is deleted.

Growing community of inventors

Austin, TX, United States of America

John Shih-Yuan Wang