Dragonfly

Abstract

Software architecture styles for developing multiuser applications are usually defined at a conceptual level, abstracting such low-level issues of distributed implementation as code replication, caching strategies and concurrency control policies. Ultimately, such conceptual architectures must be cast into code. The iterative design inherent in interactive systems implies that significant evolution will take place at the conceptual level. Equally, however, evolution occurs at the implementation level in order to tune performance. This paper introduces Dragonfly, a software architecture style that maintains a tight, bidirectional link between conceptual and implementation software architectures, allowing evolution to be performed at either level. Dragonfly has been implemented in the Java-based TeleComputing Developer (TCD) toolkit.

Agent-oriented design of human–computer interface: application to supervision of an urban transport network

“…The design of interactive systems, especially the design of their architecture, has been the subject of active research for the past twenty years (Foley and Van Dam, 1982;Pfaff, 1985;Coutaz, 1987Coutaz, , 1990Dix et al, 1993;Gram and Cockton G., 1993;Helander et al, 1997;Calvary et al, 1997;Bass et al, 1991Bass et al, , 1998Coutaz and Nigay, 2001). Currently, the research as regards architectures is moving towards new interactive applications using new information and communication technologies and sciences: CSCW and multi-user approaches (Hill et al, 1994;Tarpin-Bernard and David, 1997;Dewan, 1999;Anderson et al, 2000), intelligent systems (Kolski et al, 1993;Kolski and Le Strugeon, 1998;Beka Be Nguema et al 2000;Höök, 2000), multi-modality and multi-platform approaches (Thévenin and Coutaz, 1999;Calvary et al, 2001 andPaterno and Santoro, 2003). It is also worth mentioning the new agent oriented approaches applied to information research on the Internet (Keeble and Macredi, 2000;Klusch, 2001;.…”