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The Jadex BDI applications package contain several example applications, benchmarks and testcases using BDI agents.
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package jadex.bdi.examples.hunterprey;

import jadex.bridge.service.search.SServiceProvider;
import jadex.bridge.service.types.cms.IComponentDescription;
import jadex.bridge.service.types.cms.IComponentManagementService;
import jadex.commons.SimplePropertyObject;
import jadex.commons.future.IResultListener;
import jadex.extension.envsupport.environment.IEnvironmentSpace;
import jadex.extension.envsupport.environment.ISpaceAction;
import jadex.extension.envsupport.environment.ISpaceObject;
import jadex.extension.envsupport.environment.space2d.Grid2D;
import jadex.extension.envsupport.environment.space2d.Space2D;

import java.util.Map;


/**
 * Action for eating food or another creature.
 */
public class EatAction extends SimplePropertyObject implements ISpaceAction
{
	// -------- constants --------

	/** The property for the points of a creature. */
	public static final String	PROPERTY_POINTS	= "points";

	// -------- IAgentAction interface --------

	/**
	 * Performs the action.
	 * 
	 * @param parameters parameters for the action
	 * @param space the environment space
	 * @return action return value
	 */
	public Object perform(Map parameters, IEnvironmentSpace space)
	{
		// System.out.println("eat action: "+parameters);

		Grid2D grid = (Grid2D)space;
		IComponentDescription owner = (IComponentDescription)parameters.get(ISpaceAction.ACTOR_ID);
		ISpaceObject avatar = grid.getAvatar(owner);
		final ISpaceObject target = (ISpaceObject)parameters.get(ISpaceAction.OBJECT_ID);

		if(null == space.getSpaceObject(target.getId()))
		{
			throw new RuntimeException("No such object in space: " + target);
		}

		if(!avatar.getProperty(Space2D.PROPERTY_POSITION).equals(target.getProperty(Space2D.PROPERTY_POSITION)))
		{
			throw new RuntimeException("Can only eat objects at same position.");
		}

		Integer points = (Integer)avatar.getProperty(PROPERTY_POINTS);
		if(avatar.getType().equals("prey") && target.getType().equals("food"))
		{
			points = points != null ? Integer.valueOf(points.intValue() + 1) : Integer.valueOf(1);
		}
		else if(avatar.getType().equals("hunter") && target.getType().equals("prey"))
		{
			points = points != null ? Integer.valueOf(points.intValue() + 5) : Integer.valueOf(5);
		}
		else
		{
			throw new RuntimeException("Objects of type '" + avatar.getType() + "' cannot eat objects of type '" + target.getType() + "'.");
		}

		space.destroySpaceObject(target.getId());

		// Todo: Use listener model for self destroying of agent!?
		if(target.getProperty(ISpaceObject.PROPERTY_OWNER) != null)
		{
			// System.err.println("Destroying: "+target.getProperty(ISpaceObject.PROPERTY_OWNER));
			SServiceProvider.getServiceUpwards(space.getExternalAccess().getServiceProvider(), IComponentManagementService.class).addResultListener(
					new IResultListener()
					{
						public void resultAvailable(Object result)
						{
							IComponentManagementService cms = (IComponentManagementService)result;
							cms.destroyComponent(((IComponentDescription)target.getProperty(ISpaceObject.PROPERTY_OWNER)).getName());
						}

						public void exceptionOccurred(Exception exception)
						{
						}
					});
		}

		avatar.setProperty(PROPERTY_POINTS, points);
		// System.out.println("Object eaten: "+target);

		return null;
	}
}