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E. Shokri, P. Crane, K. Kim, "An Implementation Model for Time-Triggered Message-Triggered
Object Support Mechanisms in CORBA-Compliant COTS Platform", Proceedings for the
First International Symposium on Object-Oriented Real-Time Distributed Computing
(ISORC 98), Kyoto, Japan, April, 1998
Object-oriented analysis and design methodologies have become popular in development
of non-real-time business data processing applications. However, conventional object-oriented
techniques have had minimal impacts on development of real-time applications mainly
because these techniques do not explicitly address key characteristics of real-time
systems, in particular, timing requirements. The Time-triggered Message-triggered
Object (TMO) structuring is in our view the most natural extension of the object-oriented
design and implementation techniques which allows the system designer to explicitly
specify timing characteristics of data and function components of an object.
To facilitate TMO-based design of real-time systems in the most cost-effective manner,
it is essential to provide execution support mechanisms in well-established commercial
software/hardware platforms compliant with industry standards. In this paper, we
present an implementation model for TMO support mechanisms in CORBA-compliant commercial-off-the-self
(COTS) platforms. We first introduce a natural and simple mapping between TMOs and
CORBA objects. Then, we identify the services to be provided by the TMO support
subsystem and an efficient way these services should be implemented. The rest of
the paper discusses an implementation of the proposed model realized on top of the
Windows NT operating system and the Orbix object request).
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