Hi,
I am interested in trying out the "Teams" functionality described in the paper "Implementing Distributed Concurrent Constraint Execution in the CIAO System", whereby distributed processes cooperate in the execution of a goal:
http://clip.dia.fi.upm.es/papers/ciao-dis-impl-prode_bitmap.pdf
I've found the concurrency primitives such as &> and <& in the library module "hlc", but I cannot find how to access predicates such as add_worker(Host,Id) which control the available workers.
Has this functionality changed form since the above paper was produced, or am I simply not looking in the right place?
As some background, I am a Masters student at the University of Melbourne, Australia, working on programming languages for multi-agent systems.
Thanks for any help you can offer,
Ryan
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Dear Ryan,
Sorry about the delay in this answer, and thanks for your encouragement!
Unfortunately the "Teams" functionality as is described in that paper was implemented in a previous version of Ciao and that particular implementation does not currently run any more. It could be redone but we are actually moving instead to a newer model (see below). In the Ciao Subversion repository there is however a simple emulation of more or less the same functionality (the 'contrib/teams' package) that Amadeo Casas recently worked on. It is not very well tested yet, but you may want to give it a try (and report any problems). Other possibly useful contributed libraries are, as you have discovered, 'hlc' and 'andprolog', but they provide only partial functionality (e.g., work only for deterministic calls), so your best bet is probably 'teams'.
By the way, we are actually working on combining the teams package with the concurrent objects model and hope to include this in the distribution in not too long.
Regards,
Daniel and the Ciao team
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Daniel Cabeza Gras -
Ryan Kelly