Dds Software
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(July 2014) The Data Distribution Service for real-time systems ( DDS) is an (OMG) (sometimes called ) standard that aims to enable, and using a. DDS addresses the needs of applications like, management, and other applications. The standard is used in applications such as smartphone operating systems, transportation systems and vehicles, and by healthcare providers.
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DDS was promoted for use in the. Contents. History A few proprietary DDS systems had been available for several years. Starting in 2001, two vendors, the US government contractor Real-Time Innovations and the French teamed up to create the DDS specification, which was subsequently approved by the (OMG) resulting in version 1.0 in published in December 2004. Version 1.1 was published in December 2005, 1.2 in January 2007, and 1.4 in April 2015. DDS is covered by several US patents, among others.
The DDS specification describes two levels of interfaces:. A lower data-centric publish-subscribe (DCPS) level that is targeted towards the efficient delivery of the proper information to the proper recipients. An optional higher data local reconstruction layer (DLRL), which allows for a simple integration of DDS into the. 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. DDS for Lightweight (dds4ccm) offers an architectural pattern that separates the business logic from the non-functional properties. A 2012 extension added support for streams. A Java 5 Language PSM for DDS defined a Java 5 language binding, referred to as a Platform Specific Model (PSM) for DDS.
Dds Software
It specified only the Data-Centric Publish-Subscribe (DCPS) portion of the DDS specification; Additionally, it encompasses the DDS APIs introduced by DDS-XTypes and DDS-CCM. DDS-PSM-Cxx defines the ISO/IEC C PSM language binding, referred to as a Platform Specific Model (PSM) for DDS. It provides a new C API for programming DDS that is more natural to a C programmer. The specification provides mappings for the (API) specified in DDS-XTypes, and accessing (QoS) profiles specified in DDS-CCM. Extensible and Dynamic Topic Types for DDS (DDS-XTypes) provided support for data-centric publish-subscribe communication where topics are defined with specific data structures. To be extensible, DDS topics use data types defined before compile time and used throughout the DDS global data space. This model is desirable when static type checking is useful.
A (UML) profile specified DDS domains and topics to be part of analysis and design modeling. This specification also defined how to publish and subscribe objects without first describing the types in another language, such as XML or OMG IDL. An (IDL) was specified in 2014 independently from the (CORBA) specification chapter 3. This IDL 3.5 was compatible with the CORBA 3 specification, but extracted as its own specification so that it can evolve independently from CORBA. Starting with DDS version 1.4 in 2015, the optional DLRL layer was moved to a separate specification. Architecture Model DDS is networking that simplifies complex. It implements a for sending and receiving data, events, and commands among the.
Nodes that produce information (publishers) create 'topics' (e.g., temperature, location, pressure) and publish 'samples'. DDS delivers the samples to subscribers that declare an interest in that topic. DDS handles transfer chores: message addressing, (so subscribers can be on different platforms from the publisher), delivery, flow control, retries, etc. Any node can be a publisher, subscriber, or both simultaneously. The DDS publish-subscribe model virtually eliminates complex network programming for distributed applications. DDS supports mechanisms that go beyond the basic publish-subscribe model. The key benefit is that applications that use DDS for their communications are decoupled.
Little design time needs be spent on handling their mutual interactions. In particular, the applications never need information about the other participating applications, including their existence or locations. DDS transparently handles message delivery without requiring intervention from the user applications, including:. determining who should receive the messages.
where recipients are located. what happens if messages cannot be delivered DDS allows the user to specify (QoS) parameters to configure discovery and behavior mechanisms up-front. By exchanging messages anonymously, DDS simplifies distributed applications and encourages modular, well-structured programs. DDS also automatically handles hot-swapping redundant publishers if the primary fails. Subscribers always get the sample with the highest priority whose data is still valid (that is, whose publisher-specified validity period has not expired). It automatically switches back to the primary when it recovers, too. Interoperability Both commercial and implementations of DDS are available.
These include (APIs) and libraries of implementations in, and. Some implementations are shown in the.
DDS vendors participated in interoperability demonstrations at the OMG Spring technical meetings from 2009 to 2013. 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, and the agreement to use a common model. OMG Data Distribution Service interoperability In March 2009, three vendors (Real-Time Innovations, Inc., PrismTech and Twin Oaks) demonstrated interoperability between the individual, independent products that implemented the OMG Real-time Publish-Subscribe protocol version 2.1 from January 2009.
The demonstration included the discovery of each other's publishers and subscribers on different OS Platforms ( and ) and supported and network communications. By March 2013, six more companies joined the interoperability demonstration: Object Computing Inc. (OCI, OpenDDS), Electronics and Telecommunications Research Institute (ETRI), and RemedyIT. The DDS interoperability demonstration used scenarios such as:. Basic connectivity to network using (IP).
Discovery of publishers and subscribers. Quality of service (QoS) Compatibility between requester and offerer. Delay-tolerant networking.
Multiple topics and instances of topics. Exclusive ownerships of topics. Content filtering of topic data including time and geographic See also. (OMG), standards body that developed the specification References. Promotional brochure. Twin Oaks Computing.
January 27, 2012. Retrieved November 9, 2016.
Promotional brochure. Real-Time Innovations. May 15, 2013. Retrieved November 9, 2016.
Angelo Corsaro (October 11, 2013). Retrieved November 9, 2016. Object Management Group. December 2, 2004.
Retrieved November 9, 2016. December 4, 2005. Retrieved November 9, 2016. January 1, 2007. Retrieved November 9, 2016.
April 10, 2015. Retrieved November 9, 2016. September 2014. Retrieved November 9, 2016. DDS for Lightweight CCM (dds4ccm), Version 1.1, formal/2012-02-01, February 2012,.
Programming languages — C, 15 October 2003, ISO/IEC 14882,. DDS-PSM-Cxx: ISO/IEC C 2003 Language DDS PSM, Version ptc/2011-01-02, January 2011,. Extensible and Dynamic Topic Types for DDS (DDS-XTypes), 1.0, formal/2012-11-10, November 2012,. UML Profile for Data Distribution, version: 1.0,. DDS-Java: Java 5 Language PSM for DDSVersion 1.0, ptc/2012-12-01, March 2013.
March 1, 2014. Retrieved November 9, 2016. Retrieved November 9, 2016. ^ Angelo Corsaro, Gerardo Pardo-Castellote and Clark Tucker (August 12, 2009). Object Management Group.
Archived from (PDF) on September 15, 2011. Retrieved November 9, 2016. Real-Time Innovations, Inc. December 11, 2010. Retrieved November 9, 2016. 2011, March 2011,.
2012, March 2012,. ^ 2013, March 2013,. Real-Time Innovations. December 14, 2010. Retrieved November 9, 2016.
External links. Availability Publisher Product Download Source Code License OCI Real-Time Innovations PrismTech.
DDS develops and produces access control systems. Included in its product package is the Amadeus5 software, which is responsible for carrying out access control and has several other possibilities as a complete package of the building’s security and control system. The Amadeus5 software allows integration with a broad variety of third-party software packages and other control systems.
Over the years DDS listened to its customers and reinvented the communication systems and command mechanisms. Today, it allows connection of an almost unlimited number of controllers and networks under the management of Amadeus5.
A large part of Amadeus5’s capacities are work with multiple sites, execution of attendance reports and monitoring accesses and exits in real time, printing and production of badges for employees and guests directly from the software interface without need to pass to an external software program for printing. A detailed explanation of the capacities and possibilities allowed in use of the Amadeus5 system can be found in the following links: Currently, on a parallel to constant development of the Amadeus5 system, DDS is working on development of a new work and management environment. This environment is up-to-date, innovative and designed beyond anything existing today in the access control world.