Spring is a collection of applications and libraries that support the DDX (Dynamic Data eXchange) framework. This is the third generation of (Linux/BSD/Unix) middleware developed by the Autonomous Systems Laboratory of the CSIRO ICT Centre to provide a lightweight real-time publish/subscribe service to distributed robot controllers. DDX allows a coalition of programs to share data at run-time through an efficient shared memory mechanism. Multiple machines can be linked by means of a global naming service and, when needed, data is multi-casted across machines.
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