Data Distribution Service: Difference between revisions

Revision as of 17:05, 14 October 2019

Revision as of 18:21, 28 October 2019

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During demos, each vendor published and subscribed to each other's topics using a test suite called the shapes demo. For example, one vendor publishes information about a shape and the other vendors can subscribe to the topic and display the results on their own shapes display. Each vendor takes turns publishing the information and the other subscribe.

Two things made the demos possible: the DDS-I or Real-Time Publish-Subscribe (RTPS) protocol,<ref name="RtpsRef">{{Cite web|url=http://www.omg.org/spec/DDSI-RTPS/|title=The Real-time Publish-Subscribe Wire Protocol DDS Interoperability Wire Protocol Specification (DDSI-RTPS)|last=|first=|date=SeptemberMay 20142019|website=|url-status=live|archive-url=|archive-date=|accessdate=NovemberOctober 928, 20162019}}</ref> and the agreement to use a common model.

[[File:Notional OMG DDS Interoperability.jpg|thumb|upright=2.4|OMG Data Distribution Service interoperability]]

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Other related standards followed the initial core document.

The Real-time Publish-Subscribe Wire Protocol DDS Interoperability Wire Protocol Specification ensured that information published on a topic using one vendor's DDS implementation is consumable by one or more subscribers using the same or different vendor's DDS implementations. Although the specification is targeted at the DDS community, its use is not limited. Versions 2.0 was published in April 2008, version 2.1 in November 2010, and 2.2 in September 2014, and 2.3 in May 2019.<ref name="RtpsRef"/>

DDS for Lightweight [[CORBA Component Model|CCM]] (dds4ccm) offers an architectural pattern that separates the business logic from the non-functional properties. A 2012 extension added support for streams.<ref>DDS for Lightweight CCM (dds4ccm), Version 1.1, formal/2012-02-01, February 2012, http://www.omg.org/spec/dds4ccm/1.1/PDF/</ref>