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Object Management Architecture™

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Object Management Architecture

The Object Management Architecture (OMA) embodies the OMG's vision for the component software environment. The architecture provides guidance on how standardization of component interfaces penetrate up - although not into - applications in order to create a plug-and-play component software environment based on object technology.

Within the last several years, the OMG's work in modeling standards and the proliferation of middleware technologies dictated an evolution of the OMA. An expanded vision of the OMA can be found within the OMG's Model Driven Architecture (MDA). The arrival of the MDA does not lessen the OMA's importance in OMG activity, however, as the OMG continues to require the guidance of the OMA in its advancement of the CORBA and related services specifications (see below.)

The OMA Reference Model shown above identifies and characterizes the components, interfaces, and protocols that compose the OMA. Central to the model - its communications heart - is the Object Request Broker (ORB) component that enables clients and objects to communicate in a distributed environment. The ORB provides an infrastructure allowing objects to communicate independent of the specific platforms and techniques used to implement the addressed objects. The ORB guarantees portability and interoperability of objects over a network of heterogeneous systems. Specifications for the xe "Reference Model" ORB are contained in CORBA: Common Object Request Broker Architecture and Specification. It is worth noting that over its life CORBA has been enhanced to support embedded and real-time systems as well as those requiring fault tolerance and other Quality of Service requirements.

The CORBA Services component xe "Object Services;Object management architecture:Object Services" standardizes the life cycle management of objects. Functions are provided to create objects, to control access to objects, to keep track of relocated objects and to consistently maintain the relationship between groups of objects. The CORBA Services components provide the generic environment in which single objects can perform their tasks. Standardization of CORBA Services leads to consistency over different applications and improved productivity for the developer. Specifications for the CORBA Services that have been adopted as standards by the OMG are contained in CORBAservices: Common Object Services Specification.

Vertical CORBA Facilities represent components providing computing solutions for business problems within a specific vertical market (e.g., healthcare, manufacturing, finance). Lists of published and recently adopted Vertical CORBA Facility specifications are provided on the OMG web site. Horizontal CORBA Facilities represent those components providing support across an enterprise and across businesses. A Digital Asset Management component serves as an example of such a component.

The Application Objects part xe "Object management architecture:Application Object;Application Object" of the architecture represents those application objects performing specific tasks for users. Whether not standardized or standardized (which typically represent domain frameworks) by the OMG, these interfaces provide access to application objects that can invoke methods on remote objects either statically or dynamically in a distributed environment through the ORB. An application is typically built from a large number of basic object classes. New classes of application objects can be built by modification of existing classes through generalization or specialization of existing classes (inheritance) as provided by CORBA Services. The multi-object class approach to application development leads to improved productivity for the developer and to options for end users to combine and configure their applications.


Object Management Architecture (OMA) Press Kit
Press Releases:  EJB, CORBA and Application Servers Press Kit
Corporate Background: OMG Background Information
Q&A: CORBA Basics
Reference Material
Useful Links
 
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