package jadex.bdi.planlib.protocols.dutchauction;
import jadex.base.fipa.SFipa;
import jadex.bdi.planlib.protocols.AbstractReceiverPlan;
import jadex.bdi.planlib.protocols.AuctionDescription;
import jadex.bdi.runtime.GoalFailureException;
import jadex.bdi.runtime.IGoal;
import jadex.bdi.runtime.IMessageEvent;
import jadex.bdi.runtime.TimeoutException;
import jadex.bridge.IComponentIdentifier;
import jadex.commons.collection.SCollection;
import java.util.List;
/**
* This plan implements the receiver of the "FIPA Dutch Auction Interaction
* Protocol Specification" (XC00032 - Experimental).
*
* A dutch auction is one where the auctioneer starts with a high start price
* and continually lowers it until the first bidder accepts the price.
*/
public class DAReceiverPlan extends AbstractReceiverPlan
{
/**
* The plan body.
*/
public void body()
{
// Fetch the auction information.
IMessageEvent me = (IMessageEvent)getParameter("message").getValue();
// HACK!!! Problem, there is no reply message sent in this protocol.
// So that agent has no open active conversations.
IMessageEvent dummy = createMessageEvent("da_propose"); // Hack??? Need some conversation message to wait for
dummy.getParameter(SFipa.CONVERSATION_ID).setValue(me.getParameter(SFipa.CONVERSATION_ID).getValue());
getWaitqueue().addReply(dummy);
AuctionDescription auctiondesc = (AuctionDescription)me.getParameter(SFipa.CONTENT).getValue();
getLogger().info(getComponentName()+": Received inform_start_auction message with auction description " +
"start time: "+auctiondesc.getStarttime()+" Round time "+auctiondesc.getRoundTimeout()
+" topic: "+auctiondesc.getTopic());
if(auctiondesc.getRoundTimeout()<=0)
{
getLogger().warning(getComponentName()+"No round timeout specified");
fail();
}
// Offer the possibility to decide not to participate in the auction
Object[] tmp = decideParticipation(auctiondesc, (IComponentIdentifier)me.getParameter(SFipa.SENDER).getValue());
boolean participate = ((Boolean)tmp[0]).booleanValue();
Object auctioninfo = tmp[1];
long buftimeout = (long)(auctiondesc.getRoundTimeout()*1.1);
long firsttimeout = auctiondesc.getStarttime()==0 || (auctiondesc.getStarttime()-getTime()<=0)
? -1 : auctiondesc.getStarttime()-getTime()+buftimeout;
List offers = SCollection.createArrayList();
boolean running = true;
Object winning_offer = null; // my winning offer
Object auction_wo = null; // the winning offer of the auction
int missing_cnt = 0;
while(participate && running)
{
try
{
getLogger().info(getComponentName()+" waiting for: "+(firsttimeout==-1? buftimeout: firsttimeout));
IMessageEvent msg = (IMessageEvent)waitForReply(dummy, firsttimeout==-1? buftimeout: firsttimeout);
getLogger().info(getComponentName()+" received cfp: "+msg.getParameter(SFipa.CONTENT).getValue());
missing_cnt = 0; // Reset missing_cnt as auction continues
firsttimeout=-1;
if(msg.getType().equals("da_cfp"))
{
handleCFP(msg, auctiondesc, auctioninfo, offers);
}
else if(msg.getType().equals("da_accept_proposal"))
{
winning_offer = msg.getParameter(SFipa.CONTENT).getValue();
running = false;
}
else if(msg.getType().equals("da_reject_proposal"))
{
winning_offer = null;
}
else if(msg.getType().equals("da_inform_end_auction"))
{
Object[] res = (Object[])msg.getParameter(SFipa.CONTENT).getValue();
if(!((Boolean)res[0]).booleanValue())
winning_offer = null;
auction_wo = res[1];
running = false;
}
else
{
getLogger().warning("Could not understand: "+msg+" "+msg.getType());
}
}
catch(TimeoutException e)
{
getLogger().info(getComponentName()+" "+e.getMessage());
// Exit when no offers are received any more (for 3 times).
//System.out.println(getAgentName()+" missed cfp: "+missing_cnt);
if(++missing_cnt==3)
running = false;
}
}
if(!running)
getParameter("result").setValue(new Object[]{winning_offer, auction_wo});
getWaitqueue().removeReply(dummy);
}
/**
* Decide about participation.
* If the goal is not handled participation is true.
* @param auctiondesc The auction description.
* @return The participation state (Boolean) and the local auction info (Object).
*/
protected Object[] decideParticipation(AuctionDescription auctiondesc, IComponentIdentifier initiator)
{
Object[] ret = new Object[2];
ret[0] = Boolean.TRUE; // participate
ret[1] = null; // auction info
try
{
IGoal dp = getScope().getGoalbase().createGoal("da_decide_participation");
dp.getParameter("auction_description").setValue(auctiondesc);
dp.getParameter("initiator").setValue(initiator);
dispatchSubgoalAndWait(dp);
ret[1] = dp.getParameter("auction_info").getValue();
Boolean part = (Boolean)dp.getParameter("participate").getValue();
ret[0] = part==null? Boolean.TRUE: part;
}
catch(GoalFailureException e)
{
// Participate if no explicit decision was made.
getLogger().info("Optional goal ea_decide_request has not been handled.");
}
return ret;
}
/**
* Handle a cfp message.
* @param auctiondesc The auction description.
* @return The participation state (Boolean) and the local auction info (Object).
*/
protected Object[] handleCFP(IMessageEvent cfp, AuctionDescription auctiondesc,
Object auctioninfo, List offers)
{
//System.out.println("cfp: "+cfp.getContent());
Object[] ret = new Object[2];
ret[0] = Boolean.TRUE; // participate
ret[1] = auctioninfo;
// Instantiate make_proposal-goal with the offer of the received CFP.
IGoal mp = createGoal("da_make_proposal");
Object offer = cfp.getParameter(SFipa.CONTENT).getValue();
offers.add(offer);
mp.getParameter("cfp").setValue(offer);
mp.getParameter("auction_description").setValue(auctiondesc);
mp.getParameter("auction_info").setValue(auctioninfo);
mp.getParameterSet("history").addValues(offers.toArray());
try
{
dispatchSubgoalAndWait(mp, auctiondesc.getRoundTimeout());
}
catch(Exception e)
{
getLogger().info(getComponentName() + e.getMessage());
}
ret[1] = mp.getParameter("auction_info").getValue();
Boolean leave = (Boolean)mp.getParameter("leave").getValue();
Boolean accept = (Boolean)mp.getParameter("accept").getValue();
if(leave!=null && leave.booleanValue())
{
getLogger().info(getComponentName() + " informs the initiator of the auction "
+auctiondesc.getTopic()+" that it doesn't want to participate.");
sendMessage(getEventbase().createReply(cfp, "da_not_understood"));
ret[0] = Boolean.FALSE;
}
else if(accept!=null && accept.booleanValue())
{
// System.out.println(getAgentName()+" sending proposal: "+offer);
// Send propsal.
sendMessage(getEventbase().createReply(cfp, "da_propose"));
getLogger().info(getComponentName()+" accepted proposal: "+cfp.getParameter(SFipa.CONTENT).getValue());
}
else
{
getLogger().info(getComponentName()+" does not accept proposal and waits: "+cfp.getParameter(SFipa.CONTENT).getValue());
}
return ret;
}
}