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The Jadex quickstart package contains the ready to use "Cleanerworld" environment as a testbed for experimenting with autonomous agents and intelligent behavior.
package jadex.quickstart.cleanerworld.single;
import jadex.bdiv3.annotation.Belief;
import jadex.bdiv3.annotation.Deliberation;
import jadex.bdiv3.annotation.Goal;
import jadex.bdiv3.annotation.GoalMaintainCondition;
import jadex.bdiv3.annotation.Plan;
import jadex.bdiv3.annotation.Trigger;
import jadex.bdiv3.features.IBDIAgentFeature;
import jadex.bridge.service.annotation.OnStart;
import jadex.micro.annotation.Agent;
import jadex.quickstart.cleanerworld.environment.IChargingstation;
import jadex.quickstart.cleanerworld.environment.ICleaner;
import jadex.quickstart.cleanerworld.environment.SensorActuator;
import jadex.quickstart.cleanerworld.gui.SensorGui;
/**
* Using deliberation settings for managing conflicting goals.
*/
@Agent(type="bdi") // This annotation makes the java class and agent and enabled BDI features
public class CleanerBDIAgentB2
{
//-------- fields holding agent data --------
/** The sensor/actuator object gives access to the environment of the cleaner robot. */
private SensorActuator actsense = new SensorActuator();
/** Knowledge of the cleaner about itself (e.g. location and charge state). */
@Belief
private ICleaner self = actsense.getSelf();
//-------- simple example behavior --------
/**
* The body is executed when the agent is started.
* @param bdifeature Provides access to bdi specific methods
*/
@OnStart // This annotation informs the Jadex platform to call this method once the agent is started
private void exampleBehavior(IBDIAgentFeature bdi)
{
// Open a window showing the agent's perceptions
new SensorGui(actsense).setVisible(true);
// Create and dispatch agent goals.
bdi.dispatchTopLevelGoal(new PerformPatrol());
bdi.dispatchTopLevelGoal(new MaintainBatteryLoaded());
}
//-------- inner classes that represent agent goals --------
/**
* A goal to patrol around in the museum.
*/
@Goal(recur=true, orsuccess=false, recurdelay=3000)
// @Goal(recur=true, orsuccess=false, retrydelay=3000) // Goal flags: variation 1
// @Goal(recur=true, randomselection=true, recurdelay=3000) // Goal flags: variation 2
// @Goal(orsuccess=false, excludemode=ExcludeMode.WhenFailed, randomselection=true, retrydelay=3000) // Goal flags: variation 3
// @Goal(recur=true, posttoall=true) // Goal flags: variation 4
class PerformPatrol {}
/**
* A goal to recharge whenever the battery is low.
*/
@Goal(recur=true, recurdelay=3000,
deliberation=@Deliberation(inhibits=PerformPatrol.class)) // Pause patrol goal while loading battery
class MaintainBatteryLoaded
{
@GoalMaintainCondition // The cleaner aims to maintain the following expression, i.e. act to restore the condition, whenever it changes to false.
boolean isBatteryLoaded()
{
return self.getChargestate()>=0.2; // Everything is fine as long as the charge state is above 20%, otherwise the cleaner needs to recharge.
}
}
//-------- methods that represent plans (i.e. predefined recipes for working on certain goals) --------
/**
* Declare a plan for the PerformPatrol goal by using a method with @Plan and @Trigger annotation.
*/
@Plan(trigger=@Trigger(goals=PerformPatrol.class)) // The plan annotation makes a method or class a plan. The trigger states, when the plan should considered for execution.
private void performPatrolPlan()
{
// Follow a simple path around the four corners of the museum and back to the first corner.
System.out.println("Starting performPatrolPlan()");
actsense.moveTo(0.1, 0.1);
actsense.moveTo(0.1, 0.9);
actsense.moveTo(0.9, 0.9);
actsense.moveTo(0.9, 0.1);
actsense.moveTo(0.1, 0.1);
}
/**
* Declare a second plan for the PerformPatrol goal.
*/
@Plan(trigger=@Trigger(goals=PerformPatrol.class))
private void performPatrolPlan2()
{
// Follow another path around the middle of the museum.
System.out.println("Starting performPatrolPlan2()");
actsense.moveTo(0.3, 0.3);
actsense.moveTo(0.3, 0.7);
actsense.moveTo(0.7, 0.7);
actsense.moveTo(0.7, 0.3);
actsense.moveTo(0.3, 0.3);
}
/**
* Declare a third plan for the PerformPatrol goal.
*/
@Plan(trigger=@Trigger(goals=PerformPatrol.class))
private void performPatrolPlan3()
{
// Follow a zig-zag path in the museum.
System.out.println("Starting performPatrolPlan3()");
actsense.moveTo(0.3, 0.3);
actsense.moveTo(0.7, 0.7);
actsense.moveTo(0.3, 0.7);
actsense.moveTo(0.7, 0.3);
actsense.moveTo(0.3, 0.3);
}
/**
* Move to charging station and load battery.
*/
@Plan(trigger=@Trigger(goals=MaintainBatteryLoaded.class))
private void loadBattery()
{
System.out.println("Starting loadBattery() plan");
// Move to first known charging station -> fails when no charging station known.
IChargingstation chargingstation = actsense.getChargingstations().iterator().next();
actsense.moveTo(chargingstation.getLocation());
// Load until 100% (never reached, but plan is aborted when goal succeeds).
actsense.recharge(chargingstation, 1.0);
}
}