ABT upr4

JADE Agent Behaviours - II part

CyclicBehaviour: This behaviour stays active as long as its agent is alive and will be called
repeatedly after every event. Quite useful to handle message reception.


Exercise 1: CyclicBehaviourAgent.java

package cse5610.tutorial.behaviours;

import jade.core.Agent;
import jade.core.behaviours.CyclicBehaviour;

public class CyclicBehaviourAgent extends Agent {



protected void setup() {


addBehaviour(new MyCyclicBehaviour(this));

}



class MyCyclicBehaviour extends CyclicBehaviour {


private int count = 0;


public MyCyclicBehaviour(Agent a)


{



super(a);


}



@Override


public void action() {



System.out.println("Round " + count++);


}

}
}

Exercise 2: Extended CyclicBehaviourAgent.java

package cse5610.tutorial.behaviours;

import jade.core.Agent;
import jade.core.behaviours.CyclicBehaviour;

public class CyclicBehaviourAgent extends Agent {

private int count = 0;



protected void setup() {


addBehaviour(new MyCyclicBehaviour(this));


addBehaviour(new CounterBehaviour(this));




}



protected void takeDown() {


System.out.println("Disposing of agent");

}



class CounterBehaviour extends CyclicBehaviour {



public CounterBehaviour(Agent a)


{



super(a);


}

---

@Override


public void action() {



if(count == 10)




myAgent.doDelete();


}




}



class MyCyclicBehaviour extends CyclicBehaviour {



public MyCyclicBehaviour(Agent a)


{



super(a);


}



@Override


public void action() {



System.out.println("Round " + count++);


}

}
}

Exercise 3: Generic Behaviour

package cse5610.tutorial.behaviours;

import jade.core.Agent;
import jade.core.behaviours.Behaviour;

public class GenericBehaviourAgent extends Agent {


protected void setup()

{


addBehaviour(new ThreeStepBehaviour());

}



class ThreeStepBehaviour extends Behaviour {


private int step = 0;





public void action() {



switch(step) {



case 0:




// do something




step++;




System.out.println("Step " + step);







break;



case 1:




// do something




step++;




System.out.println("Step " + step);







break;



case 2:




// do something




step++;




System.out.println("Step " + step);







break;



}

---

}



@Override


public boolean done() {



return step == 3;


}





}
}


Exercise 4: Expand the previous exercise so that at the end of the
ThreeStepBehaviour, the agent starts a new OneShotBehaviour

Composite Behaviours
*
ParallelBehaviour: controls a set of children behaviours that execute in parallel. The
important thing is the termination condition: we can specify that the group terminates
when ALL children are done, N children are done or ANY child is done.
*
SequentialBehaviour: this behaviour executes its children behaviours one after the other
and terminates when the last child has ended.

SequentialBehaviour & ParallelBehaviour


import jade.core.Agent;
import jade.core.behaviours.OneShotBehaviour;
import jade.core.behaviours.ParallelBehaviour;
import jade.core.behaviours.SequentialBehaviour;

public class CompositeBehaviourAgent extends Agent {


protected void setup()

{


SequentialBehaviour seq1 = new SequentialBehaviour(this);


seq1.setBehaviourName("SB1");





seq1.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : First");





}




});





seq1.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : Second");





}




});






seq1.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : Third");





}

---

});






SequentialBehaviour seq2 = new SequentialBehaviour(this);


seq2.setBehaviourName("SB2");





seq2.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : First");





}




});





seq2.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : Second");





}




});






seq2.addSubBehaviour(




new OneShotBehaviour(this) {





public void action() {






System.out.println(this.getParent().getBehaviourName() + " : Third");





}




});






ParallelBehaviour p = new ParallelBehaviour(this,
ParallelBehaviour.WHEN_ALL);





p.addSubBehaviour(seq1);


p.addSubBehaviour(seq2);





addBehaviour(p);

}
}

---