Model Driven Architecture and Rhapsody OMG（模型驱动架构和Rhapsody,OMG）.pdf

Model Driven Architecture and Rhapsody Dr. Bruce Powel Douglass Chief Evangelist Telelogic Model Driven Architecture and Rhapsody Abstract MDA , short for Model Driven Architecture, is a unification by the Object Management Group (OMG) of the independent technologies of middleware and modeling. The OMG owns the standards for both CORBA , the most prevalent middleware standard, and the UML , the de facto standard language for software modeling. The OMG is primarily concerned with interoperability of systems, in terms of both running on distributed heterogeneous hardware ( CORBA part) and the models (UML part). The interoperability is primarily focused on the integration of legacy systems and systems you plan to construct or integrate with in the future. The primary advantage of MDA is a unified approach to the design and development of platform-independent systems that can be easily ported from one environment to another and can be easily hosted on heterogeneous environments. Alphabet Soup – CORBA, UML, and MDA Basics CORBA (Common Object Request Broker Architecture) is a powerful, mature technology for constructing systems that are distributed across many, usually heterogeneous, computing environments. This is accomplished through the application of the Broker Design Pattern. This is an architectural design pattern in which the centerpiece is the underlying CORBA infrastructure – the Object Broker. One of the difficulties in large scale distributed systems design is designing so-called symmetric architectures – architectures in which you do not know at design time where objects and services will