Object management in a CASE environment

Abstract

The Sun Network Software Environment (NSE) is a network-based object manager for software development. The NSE supports parallel development through an optimistic concurrency control mechanism, in which developers do not acquire locks before modifying objects. Instead, developers copy objects, modify the copies, and merge the modified objects with the originals. Objects managed by the NSE are typed, and the set of types can be extended by tool builders. The NSE is designed to work with heterogeneous implementations and poor communication. 154 0 1989 ACM 0270-5257/89/05OO/Ol54$00.75 Recommended by: Mark Dowson

Locking without requesting a lock: A consistency maintenance mechanism in Internet-based real-time group editors

“…Their multi-versioning process model can be seen as an extension of the classical copy-modify-merge model of the concurrent versions system (CVS) [3] and the Sun network software environment (NSE) [1] tempered with an automatic merging support. 3 However, POLO implements both the contextual intention oriented multi-versioning scheme [30] that defines conflict at the object attribute level and the atomic object based multi-versioning scheme [31] that defines conflict at the object level.…”

Meta-Environments for Software Production

“…The Sun Network Software Environment (NSE) [1] i s a n e t w ork-based object manager and tool integration facility. NSE is primarily a Unix environment with additional support for object management, conguration management, version management, distribution, environment management, target generation, and environment front-ends.…”

Integrating object and agent worlds

“…The copy-merge paradigm [1] allows parallel changes to one object possibly due to distinct tasks. Parallel changes may cause conflicts which could be resolved by merging.…”

“…3. It adheres to the copy-merge paradigm offered by SUN's Network Software Environment NSE [1]. Such a object sharing protocol supports an integrative work structure and may thus lead to a better overall group result than the usual reserve-deposit paradigm, provided sufficiently dense group collaboration can be achieved [4].…”

“…9 an object management system (NSE [1]) which offers workspaces as well as simple version and configuration management (based on SCCS and MAKE), 9 standard eleclmnic mail, and 9 the basic command set of Unix (or a fancier user interface on top of it).…”