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A Synchronous Scheduling Service for Distributed Real-Time Java

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4 Author(s)
Basanta-Val, P. ; Telematica, Univ. Carlos III de Madrid, Leganes, Spain ; Estévez-Ayres, I. ; Garcia-Valls, M. ; Almeida, L.

Current trends in real-time systems identify Java as a new alternative to develop both centralized and distributed real-time systems. Many efforts have been devoted to develop the Real-Time Specification for Java (RTSJ), and there is substantial ongoing activity to produce a straightforward and valuable Distributed Real-Time Specification for Java (DRTSJ). The current paper provides a contribution to this latter activity defining, from different angles, a synchronous scheduling service aligned with principles of some popular real-time architectures. This service orchestrates the system in such a way that it provides end-to-end guarantees in the distributed transactions, guaranteeing their timely execution across the network and nodes. The service is described from two points of view: the system one, characterizing a portable model; and the programmer one, defining a distributed object-oriented implementation of a model based on Real-Time Remote Method Invocation (RTRMI). Finally, it also presents results of an implementation carried out to judge the efficiency of the service, offering a preliminary predictability and performance assessment of a distributed real-time Java technology.

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:21 ,  Issue: 4 )