The Design of Real-Time Distributed information Systems with Object-Oriented and Fault-Tolerant Characteristics.
Shi-Kuo Chang, Ângelo Perkusich, Jorge C. A. de Figueiredo, Bing Yu, Wolfgang D. Ehrenberger · 1993
For real-time distributed information systems (RTDIS) , a high degree of reliability, availability and safety is usually required. In this paper, we first discuss the major features that a design methodology for RTDIS should possess. A survey of current design approaches is then given. The G-Net methodology for the design of RTDIS with object oriented and fault tolerance characteristics is presented. It is shown that fault tolerant G-Nets supporting rollback recovery and N-version programming can be designed. 1 Introduction In an object oriented approach for the design of a software system, models of entities are constructed as self-contained components. The system's behavior is defined by the interaction among these selfcontained components. The object oriented design emphasizes the concepts of information hiding and abstract data types. Thus, the design methodology must address the main features of object oriented design, that is, object identity, encapsulation, inheritance and pol...