DDS Tutorial -- Part II Hands On - OMG
DDS Tutorial -- Part II Hands On - OMG
DDS Tutorial -- Part II Hands On - OMG
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Listeners, Conditions & WaitSetsMiddleware must notify user application of relevant events:– Arrival of data– But also:• QoS violations• Discovery of relevant entities– These events may be detected asynchronously by the middleware… Same issue arises with POSIX signals<strong>DDS</strong> allows the application to choice:– Either to get notified asynchronously using a Listener– Or to wait synchronously using a WaitSetBoth approaches are unified using STATUS changes© 2009 Real-Time Innovations, Inc.
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