ActiveJava
Copyright Tristan Aubrey-Jones May 2008.
Abstract:
A project investigating and developing an implicitly concurrent programming language,
based on a metaphor taken from the physical world is reported. Uses a programming
paradigm where programs consist of systems of autonomous agents, or active objects
which communicate via message passing. A language enhancing Java with actors and
linear types is presented. Example programs are written, compiled, and
executed to evaluate the usefulness of the language. The
language found to provide a familiar notation for implicit parallelism, and a compelling
new model for concurrency, combining the performance of shared variables with the
elegance of message passing.
Introductory Slides (PDF),
Report (PDF),
ActiveJava compiler prototype (ajavac),
ActiveJava runtime library (ajava_lang).
Examples:
calc - pocket calculator actor program
dining - dining philosophers actor program (never deadlocks)
sort - parallel quicksort implementation ("SortBenchmark" sorts 10,000 random integers using actors, java threads, and sequentially and compares)
To compile examples use:
compile.bat ./calc
compile.bat ./sort
compile.bat ./dining
To run examples use:
run ./calc Main
run ./dining Main
run ./dining Main fast
run ./sort Main
run ./sort SortingBenchmark
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