public void action() {
ServiceDescription sd = new ServiceDescription();
sd.setType(SERVER_AGENT);
sd.setName(getName());
sd.setOwnership("Prof6802");
DFAgentDescription dfd = new DFAgentDescription();
dfd.setName(getAID());
dfd.addServices(sd);
try {
DFAgentDescription[] dfds = DFService.search(myAgent, dfd);
if (dfds.length > 0) {
DFService.deregister(myAgent, dfd);
}
DFService.register(myAgent, dfd);
System.out.println(getLocalName() + " is ready.");
} catch (Exception ex) {
System.out.println("Failed registering with DF! Shutting down...");
ex.printStackTrace();
doDelete();
}
}
/**
* Prints a hello message and creates a sequential behavior.
*
* <p>First sub-behavior is a finite state machine, which tries to get tour information. It
* contacts tour guide agent to get the tour guide. In case of failure, machine ends. If a
* response is received, it contacts curator agent to get tour details.
*
* <p>Second sub-behavior prints goodbye message.
*/
protected void setup() {
/*
* Hello message.
*/
System.out.println(this.getAID().getLocalName() + ": begin operation");
/*
* Request sent to the tour guide. It uses TourGuideInitiator class to
* make communication easier.
*/
ACLMessage initTourRequest = new ACLMessage(ACLMessage.REQUEST);
initTourRequest.setProtocol(FIPANames.InteractionProtocol.FIPA_REQUEST);
initTourRequest.setContent("request-tour-guide");
/*
* The Profiler looks for the registered Tour Guides.
*/
DFAgentDescription template = new DFAgentDescription();
ServiceDescription sd = new ServiceDescription();
sd.setType("tour-guide");
template.addServices(sd);
try {
DFAgentDescription[] result = DFService.search(this, template);
for (int i = 0; i < result.length; ++i) {
initTourRequest.addReceiver(result[i].getName());
}
} catch (FIPAException fe) {
fe.printStackTrace();
}
TourGuideInitiator initGuide = new TourGuideInitiator(this, initTourRequest);
/*
* Same as above, but with curator agent.
*/
ACLMessage detailTourRequest = new ACLMessage(ACLMessage.REQUEST);
detailTourRequest.setProtocol(FIPANames.InteractionProtocol.FIPA_REQUEST);
detailTourRequest.setContent("request-tour-details");
/*
* The Profiler looks for the registered curators.
*/
template = new DFAgentDescription();
sd = new ServiceDescription();
sd.setType("curator");
template.addServices(sd);
try {
DFAgentDescription[] result = DFService.search(this, template);
for (int i = 0; i < result.length; ++i) {
detailTourRequest.addReceiver(result[i].getName());
}
} catch (FIPAException fe) {
fe.printStackTrace();
}
CuratorInitiator initCurator = new CuratorInitiator(this, detailTourRequest);
/*
* State machine consists of two states:
* 1. Communication with tour guide agent
* 2. Communication with curator agent
* 3. Final state
*
* It is constructed below.
*/
OneShotBehaviour lastState =
new OneShotBehaviour(this) {
public void action() {}
};
FSMBehaviour fsm = new FSMBehaviour(this);
fsm.registerFirstState(initGuide, STATE_GET_GUIDE);
fsm.registerState(initCurator, STATE_GET_DETAILS);
fsm.registerLastState(lastState, STATE_LAST);
fsm.registerTransition(STATE_GET_GUIDE, STATE_GET_DETAILS, 0);
fsm.registerTransition(STATE_GET_GUIDE, STATE_LAST, 1);
fsm.registerDefaultTransition(STATE_GET_DETAILS, STATE_LAST);
/*
* Sequential behavior is constructed and added as default agent
* behavior.
*/
SequentialBehaviour seqBeh = new SequentialBehaviour(this);
seqBeh.addSubBehaviour(fsm);
seqBeh.addSubBehaviour(
new OneShotBehaviour(this) {
public void action() {
System.out.println(myAgent.getAID().getLocalName() + ": closing");
}
public int onEnd() {
myAgent.doDelete();
return super.onEnd();
}
});
addBehaviour(seqBeh);
}