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Re: Agents in Prova rule language wrapped by UMO

by Andrew Perepelytsya :: Rate this Message:

Alex,

If you feel like releasing this module into a public domain, we can host it in mule-contrib SVN repository, which is a repository for modules 'affiliated' with Mule, but not necessarily bundled with a core distribution. Let me know if it sounds ok, we'll then arrange for access permissions so you can commit to the repo directly.

Andrew

On 10/15/06, alex.kozlenkov <alex.kozlenkov@...> wrote:

It took me a Sunday's work to wrap agents written in Prova rule language by a
Mule UMO. Prova has rich built-in message-processing functionality based on
reaction rules. Originally, we used local, JADE, and JMS protocols but it
made perfect sense to use Mule now.

Prova is now approaching release 2.0 and in the new beta 2f, this
functionality will be enabled. This is an example of two agents:
Agent001

:- eval(agent001()).

card('Mastercard').
card('Visa').

agent001() :-
        card(Card),
        sendMsg(XID, esb, "Agent002", request, card(Card)).

Agent002

rcvMsg(XID, Protocol, From, request, card(Card)) :-
        iam(Me),
        println(["Request received by ",Me," on protocol ",Protocol," from ",From,"
about card ",Card]).

The above starts Agent001 by running the goal "agent001()" then sends two
messages for either of the two cards on the "esb" protocol. The second agent
has a reaction rule that accepts messages matching the specified pattern and
prints the main data.

This is, of course, a toy example, but we could easily extrapolate this to
useful rule-based decison making nodes. For example, the decision logic in
the Mule Loanbroker example can be easily extermalised as rules. Prova is
also good for various intelligent routing stuff based on Petri nets or state
machines.
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