99 lines
2.8 KiB
JavaScript
99 lines
2.8 KiB
JavaScript
// A simple two-agent system playing ping-pong
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// and communicating by exchanging signals.
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// Each agent is processed on a different logical node.
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var Jam = process.release?require('./jamlib.debug'):require('jamlib');
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var util = require('util');
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// Create the JAM and JAM world consisting initially of one logical node
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// at position {x=0,y=0} with number 0
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var JAM = Jam.Jam({
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nocp:true, // Disable check-pointing (only useful with known agent behaviour)
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print:function (msg) {console.log(msg);},
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verbose:1,
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});
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// Add another node at position {x=1,y=0} with number 1
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JAM.addNodes([{x:1,y:0}]);
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JAM.connectNodes([{x1:0,y1:0,x2:1,y2:0}]);
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console.log('My nodes are (by number): ['+JAM.getNodeName(0)+','+JAM.getNodeName(1)+']');
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console.log('My nodes are (by position): ['+JAM.getNodeName({x:0,y:0})+','+JAM.getNodeName({x:1,y:0})+']');
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JAM.init();
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JAM.start();
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// The agent class template (constructor function)
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var PingPongClass = function (pingMe) {
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/* Body variables */
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this.pingMe=pingMe; // What to do next
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this.worker=undefined; // Forked worker agent
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/* Activities */
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this.act = {
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init: function () {
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/* Initilization */
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log('init '+(this.pingMe?'ping':'pong'));
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if (this.pingMe) {
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// Fork pong agent
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trans.update(init,init);
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this.worker=fork({pingMe:false});
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// Wait for second agent to finish migration
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trans.update(init,ping);
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sleep(500);
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} else {
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trans.update(init,migrate);
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}
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},
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ping: function () {
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// Send request
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log('ping');
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if (this.worker)
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send(this.worker,'PING');
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else
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send(myParent(),'PING');
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// sleep random time (blocks this activity)
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sleep(random(50,500));
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},
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pong: function () {
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// Send reply
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log('pong');
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if (this.worker)
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send(this.worker,'PONG');
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else
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send(myParent(),'PONG');
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// sleep random time (blocks this activity)
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sleep(random(50,500));
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},
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migrate: function () {
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moveto(DIR.EAST);
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},
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wait: function () {
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// Signal handler wakes me up
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sleep();
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}
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};
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this.trans = {
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init: function () {return this.pingMe?ping:migrate},
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ping: 'wait',
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pong: function () {return this.pingMe?ping:wait},
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migrate: 'wait',
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wait: function () {return this.pingMe?pong:wait},
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};
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this.on = {
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'PING': function () {
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this.pingMe=true;
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wakeup();
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},
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'PONG': function () {
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this.pingMe=false;
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wakeup();
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},
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error: function (e,error) {log('Exception '+e+': '+error)}
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}
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this.next='init';
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}
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// Analyze agent class template
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print(JAM.analyze(PingPongClass,{level:2,classname:'PingPongClass',verbose:1}).report);
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// Start agents
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var a1 = JAM.createAgent(PingPongClass,[true],1);
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