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();
      }
    }
Example #2
0
  /**
   * 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);
  }