Aurea Software, Inc.

Progress Software Corporation

Other

Sonic Software Corporation

William M Cullen

Michael E Theroux

Peter Stewart Easton

Gavin Nicol

Ronald F Rudis

William J Collins

David A Chappell

Charles A Nuzzolo, Jr

Ling-Yun Yin

Donald E Stinchfield

Giovanni Boschi

Colin W MacNaughton

A system for dynamic message routing on a topic between publishing nodes and subscribing nodes includes a plurality of message queues, at least one topic/node table, a subscribing module, a publishing module, and other modules to send messages between one or more publisher and one or more subscribers. These modules are coupled together by a bus in a plurality of nodes and provide for the dynamic message routing on a topic between publishing nodes and subscribing nodes. The message queues store messages at each node for delivery to subscribers local to that node. The topic/node table lists which clients subscribe to which topics, and is used by the other modules to ensure proper distribution of messages. The subscribing module is use to establish a subscription to a topic for that node. The publishing module is used to identify subscribers to a topic and transmit messages to subscribers dynamically. The other modules include various devices to optimize message communication in a publish/subscribe architecture operating on a distributed computing system. The present invention also includes a number of novel methods including: a method for publishing a message on a topic, a method for forwarding a message on a topic, a method for subscribing to messages on a topic, a method for automatically removing subscribers, a method for direct publishing of messages, and methods for optimizing message transmission between nodes.

Dynamic subscription and message routing on a topic between publishing nodes and subscribing nodes

A system for dynamic message routing on a topic between publishing nodes and subscribing nodes includes a plurality of message queues, at least one topic/node table, a subscribing module, a publishing module, and other modules to send messages between one or more publisher and one or more subscribers. Methods include: a method for publishing a message on a topic, a method for forwarding a message on a topic, a method for subscribing to messages on a topic, a method for automatically removing subscribers, a method for direct publishing of messages, and methods for optimizing message transmission between nodes.

A system and method for an extensible tracking system. A set of autonomous tags detect their location such as via GPS and broadcast their location to other nearby tags. Using separate communication technology, each tag can also communicate with an associated user device such as a smart phone. The user device(s) provide a user interface for queries into the system. The broadcasts among all tracking devices insures no reliance on a single tracking device, and associating tags with a respective set of user devices eliminates reliance on a central system for tracking to locations of all tags.

Extensible tracking system

The disclosure includes a description of a method of handling messages received at a messaging system server. The method includes storing, in non-persistent storage, messages received from at least one client, removing delivered messages from the non-persistent storage, and saving messages stored in the non-persistent storage to persistent storage after a delay interval.

Message handling

A fault-tolerant messaging system comprises a primary broker, a first network, a back up broker, and a second network. The primary broker and the back up broker are coupled to the first network for communication with clients thus creating a messaging system. The primary broker and the back up broker are also coupled to the second network for replicating state from the primary broker and the back up broker, and also sending transaction events immediately to maintain synchronization. The brokers further comprise a replication module for communicating state between the primary broker and the back up broker, a recovery module for performing recovery on the back up broker upon failure of the primary broker, and a fault-tolerant connection module for establishing a fault-tolerant connection between the primary broker and the back up broker over the second network. The present invention also includes a number of novel methods for performing fault tolerance.

Fault-tolerant messaging system and methods

Techniques are disclosed for debugging heterogeneous applications in a distributed environment. In one embodiment, an architecture for debugging heterogeneous applications in a distributed environment is configured to enable both location transparency and dynamic exposure of service state. Regardless of where the physical application state resides, the architecture describes or otherwise provides a mechanism that allows seamless debugging and troubleshooting of distributed applications. The location of the state is transparent to the debugger and the application being debugged. In addition, the architecture enables an individual service to expose its state dynamically at run-time. It is possible for the service to expose its state in a self-describing fashion, allowing service state to be exposed in the architecture regardless of the service environment. The architecture allows for all the capabilities of debuggers running in non-distributed, homogeneous environments in a distributed heterogeneous environment.

Techniques for debugging distributed applications

The disclosed technology enables electronic messages generated by one software application program to be routed to another remote software application program via a middleware oriented messaging ('MOM') infrastructure using named/labeled routing nodes and queues. Network connection information corresponding to particular routing nodes and queues can be automatically and dynamically determined by periodically, and/or upon the occurrence of an event, transmitting/receiving informational messages between software processes associated with known/previously-encountered routing nodes and queues. The routing nodes and queues can be identified by names or labels, which can be dynamically mapped to network connection information at runtime in the event of an addition, deletion, or modification to a processor cluster via the information contained in the informational messages.

Growing community of inventors

Cambridge, MA, United States of America

William M Cullen