next up previous
Next: Introduction

Systematic Composition of Objects
in Distributed Internet Applications:
Processes and Sessions

K. Mani Chandy and Adam Rifkin gif
Computer Science 256-80
California Institute of Technology
Pasadena, California 91125

June 9, 1996


We consider a system with the infrastructure for the creation and interconnection of large numbers of distributed persistent objects. This system is exemplified by the Internet: potentially, every appliance and document on the Internet has both persistent state and the ability to interact with large numbers of other appliances and documents on the Internet. This paper elucidates the characteristics of such a system, and proposes the compositional requirements of its corresponding infrastructure. We explore the problems of specifying, composing, reasoning about, and implementing applications in such a system. A specific concern of our research is developing the infrastructure to support structuring distributed applications by using sequential, choice, and parallel composition, in the anarchic environment where application compositions may be unforeseeable, and interactions may be unknown prior to actually occurring. The structuring concepts discussed are relevant to a wide range of distributed applications; our implementation is illustrated with collaborative Java processes interacting over the Internet, but the methodology provided can be applied independent of specific platforms.

Key words: Distributed Systems, Composition, Reasoning, Java, Internet.

This paper is also available as postscript and gzipped postscript. Please also see some of my other papers with the Caltech Infospheres Project.

Generated by Adam Rifkin, adam at xent dot com, June 9, 1996.