A Distributed Object-Oriented Language for Heterogeneous Computer Networks

  • Authors:

  • Agostino Poggi;Giuliano Armano

  • Affiliations:

  • Dipartimento di Ingegneria dell'Informazione, University of Parma Viale delle Scienze, 43100 Parma, Italy, poggi@ce.unipr.it;Dipartimento di Ingegneria Elettrica ed Elettronica, University of Cagliari Piazza D'Armi, 09123 Cagliari, Italy

  • Venue:
  • The Journal of Supercomputing
  • Year:
  • 1999

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Abstract

This paper presents an object-oriented distributed language, called CUBL++, that is a powerful tool for developing distributed applications on heterogeneous computer networks. CUBL++ is based on objects, called c_units, that communicate through synchronous and asynchronous message passing. A c_unit is an active object composed of data (state) and procedures as traditional (passive) objects, together with the capability of queueing incoming messages, when needed. C_units allow a programmer to implement an application on a heterogeneous architecture, as they communicate with each other without taking into account the physical characteristics of the actual node where they are located. We have experimented CUBL++ on a network where UNIX workstations, WindowsNT personal computers and transputers cooperate in order to perform a given task. In particular, this paper gives a brief description of a distributed system for image processing that has been implemented by using CUBL++.