Sb96899

{

System.out.println("Agent "+inform.getSender().getName()+ " successfully performed the requested action");

}

protected void handleRefuse(ACLMessage refuse)

{

System.out.println("Agent "+refuse.getSender().getName()+ " refused to perform the requested action");

nResponders--;

}

protected void handleFailure(ACLMessage failure)

{

if (failure.getSender().equals(myAgent.getAMS()))

{

//FAILURE notification from the JADE runtime: the receiver

//does not exist

System.out.println("Responder does not exist");

}

else

{

System.out.println("Agent "+failure.getSender().getName()+ " failed to perform the requested action");

}

}

protected void handleAllResultNotifications(Vector notifications)

{

if (notifications.size() < nResponders)

{

// Some responder didn't reply within the specified timeout System.out.println("Timeout expired: missing "+(nResponders –

notifications.size())+" responses");

}

}

} );

}

else

{

System.out.println("No responder specified.");

}

}

}

//Файл maslabs.lab6.FIPARequestResponderAgent.java /*Агент, получающий запрос по протоколу FIPARequest*/ package maslabs.lab6;

import jade.core.Agent; import jade.core.AID;

import jade.lang.acl.ACLMessage; import jade.lang.acl.MessageTemplate; import jade.proto.AchieveREResponder; import jade.domain.FIPANames;

import jade.domain.FIPAAgentManagement.NotUnderstoodException; import jade.domain.FIPAAgentManagement.RefuseException;

import jade.domain.FIPAAgentManagement.FailureException;

public class FIPARequestResponderAgent extends Agent

{

protected void setup()

{

31

System.out.println("Agent "+getLocalName()+" waiting for requests..."); MessageTemplate template = MessageTemplate.and(

MessageTemplate.MatchProtocol(FIPANames.InteractionProtocol.FIPA_REQUEST), MessageTemplate.MatchPerformative(ACLMessage.REQUEST) );

addBehaviour(new AchieveREResponder(this, template)

{

protected ACLMessage prepareResponse(ACLMessage request) throws NotUnderstoodException, RefuseException

{

System.out.println("Agent "+getLocalName()+": REQUEST received from " +request.getSender().getName()+". Action is

"+request.getContent()); if (checkAction())

{

//We agree to perform the action. Note that in the FIPA-Request

//protocol the AGREE message is optional. Return null if you

//don't want to send it.

System.out.println("Agent "+getLocalName()+": Agree"); ACLMessage agree = request.createReply(); agree.setPerformative(ACLMessage.AGREE);

return agree;

}

else

{

// We refuse to perform the action System.out.println("Agent "+getLocalName()+": Refuse"); throw new RefuseException("check-failed");

}

}

protected ACLMessage prepareResultNotification(ACLMessage request, ACLMessage response) throws FailureException

{

if (performAction())

{

System.out.println("Agent "+getLocalName()+": Action successfully performed");

ACLMessage inform = request.createReply(); inform.setPerformative(ACLMessage.INFORM); return inform;

}

else

{

System.out.println("Agent "+getLocalName()+": Action failed"); throw new FailureException("unexpected-error");

}

}

} );

}

private boolean checkAction()

{

// Simulate a check by generating a random number return (Math.random() > 0.2);

}

private boolean performAction()

{

// Simulate action execution by generating a random number return (Math.random() > 0.2);

}

}

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3. Листинги программ к Лабораторной работе № 7

//Файл maslabs.lab7.DFRegisterAgent.java

/*Агент-держатель курсов, выполняющий регистрацию своих сервисов */ package maslabs.lab7;

import jade.core.Agent; import jade.core.AID;

import jade.domain.DFService; import jade.domain.FIPAException; import jade.domain.FIPANames;

import jade.domain.FIPAAgentManagement.DFAgentDescription; import jade.domain.FIPAAgentManagement.ServiceDescription; import jade.domain.FIPAAgentManagement.Property;

public class DFRegisterAgent extends Agent

{

protected void setup()

{

// Register the service

System.out.println("Agent "+getLocalName()+" registering service "); try

{

DFAgentDescription dfd = new DFAgentDescription(); dfd.setName(getAID());

ServiceDescription sd = new ServiceDescription(); sd.setName("Agent1-Course-Facilitator"); sd.setType("Course-Facilitator");

sd.addProperties(new Property("course_name", "Multiagent system")); dfd.addServices(sd);

DFService.register(this, dfd);

}

catch (FIPAException fe)

{

fe.printStackTrace();

}

}

protected void takeDown()

{

// Deregister from the yellow pages try

{

DFService.deregister(this);

}

catch (FIPAException fe)

{

fe.printStackTrace();

}

//Close the GUI myGui.dispose();

//Printout a dismissal message

System.out.println("Course-Facilitator-agent" + getAID().getName()+ " terminating.");

}

}

//Файл maslabs.lab7.DFRegisterAgent.java

/*Агент, выполняющий поиск агентов, предоставляющих учебные курсы */

33

package maslabs.lab7; import jade.core.Agent; import jade.core.AID;

import jade.domain.DFService; import jade.domain.FIPAException; import jade.domain.FIPANames;

import jade.domain.FIPAAgentManagement.DFAgentDescription; import jade.domain.FIPAAgentManagement.ServiceDescription; import jade.domain.FIPAAgentManagement.SearchConstraints; import jade.util.leap.Iterator;

public class DFSearchAgent extends Agent

{

protected void setup()

{

// Search for services of type " Course-Facilitator " System.out.println("Agent "+getLocalName()+" searching for services of

type \"Course-Facilitator\"");

try

{

// Build the description used as template for the search DFAgentDescription template = new DFAgentDescription(); ServiceDescription templateSd = new ServiceDescription(); templateSd.setType("Course-Facilitator"); template.addServices(templateSd);

SearchConstraints sc = new SearchConstraints(); // We want to receive 10 results at most sc.setMaxResults(new Long(10));

DFAgentDescription[] results = DFService.search(this, template, sc); if (results.length > 0)

{

System.out.println("Agent "+getLocalName()+" found the following Course-Facilitator services:");

for (int i = 0; i < results.length; i++)

{

DFAgentDescription dfd = results[i]; AID provider = dfd.getName(); Iterator it = dfd.getAllServices(); while (it.hasNext())

{

ServiceDescription sd = (ServiceDescription) it.next(); if (sd.getType().equals("Course-Facilitator"))

{

System.out.println("- Service \""+sd.getName()+"\" provided by agent "+provider.getName());

}

}

}

}

else

{

System.out.println("Agent "+getLocalName()+" did not find any Course-Facilitator service");

}

}

catch (FIPAException fe)

{

fe.printStackTrace();

}

}

}

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