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Paper Details

%T Communicating Scala Objects
%A Bernard Sufrin
%E Peter H. Welch, S. Stepney, F.A.C Polack, Frederick R. M. Barnes, Alistair A. McEwan, G. S. Stiles, Jan F. Broenink, Adam T. Sampson
%B Communicating Process Architectures 2008
%X In this paper we introduce the core features of CSO
   (Communicating Scala Objects) — a notationally
   convenient embedding of the essence of occam in a modern,
   generically typed, object\-oriented programming language
   that is compiled to Java Virtual Machine (JVM) code.
   Initially inspired by an early release of JCSP, CSO goes
   beyond JCSP expressively in some respects, including
   the provision of a unitary extended rendezvous notation and
   appropriate treatment of subtype variance in channels and
   ports. Similarities with recent versions of JCSP include the
   treatment of channel ends (we call them ports) as
   parameterized types. Ports and channels may be transmitted
   on channels (including inter\-JVM channels), provided that
   an obvious design rule — the ownership rule
   — is obeyed. Significant differences with recent
   versions of JCSP include a treatment of network termination
   that is significantly simpler than the
   <q>poisoning</q> approach (perhaps at the cost
   of reduced programming convenience), and the provision of a
   family of type\-parameterized channel implementations with
   performance that obviates the need for the special\-purpose
   scalar\-typed channel implementations provided by JCSP. On
   standard benchmarks such as Commstime, CSO
   communication performance is close to or better than that of
   JCSP and Scala\[rs]s Actors library.

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