1 | package bargainingchips.players;
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2 |
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3 | import java.util.concurrent.BlockingQueue;
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4 | import java.util.concurrent.LinkedBlockingQueue;
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5 |
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6 | import bargainingchips.Bundle;
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7 | import bargainingchips.NegotiationContext;
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8 | import bargainingchips.OutcomeSpace;
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9 | import bargainingchips.actions.Accept;
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10 | import bargainingchips.actions.Bid;
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11 | import bargainingchips.actions.Offer;
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12 | import bargainingchips.actions.OfferBy;
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13 | import bargainingchips.outcomes.Outcome;
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14 | import bargainingchips.utilityfunctions.UtilityFunction;
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15 |
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16 | /**
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17 | * Basic agent, by Tim Baarslag
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18 | */
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19 | public class BasicAgent extends Agent
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20 | {
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21 | private Offer lastReceivedOffer = null;
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22 |
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23 | /**
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24 | * For sellers, dummy coordinator queues are created but are never linked up
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25 | */
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26 | public BasicAgent(String name, UtilityFunction u, NegotiationContext nc,
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27 | BlockingQueue<Offer> in, BlockingQueue<OfferBy> out)
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28 | {
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29 | super(name, u, nc, in, out,
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30 | new LinkedBlockingQueue<CoordinationMessage>(),
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31 | new LinkedBlockingQueue<StatusMessage>());
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32 | }
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33 |
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34 | @Override
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35 | protected Offer sendOffer()
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36 | {
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37 | // Nothing received yet
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38 | if (lastReceivedOffer == null)
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39 | return new Bid(getNextBid());
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40 |
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41 | // Our last bid got accepted. We are also accepting (and we should notify the coordinator).
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42 | if (lastReceivedOffer.isAccept())
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43 | return new Accept(lastReceivedOffer);
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44 |
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45 | Bundle lastReceivedBid = lastReceivedOffer.getBundle();
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46 | Bundle nextBid = getNextBid();
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47 |
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48 | double lastUtil = lastReceivedBid != null ? u.getUtility(lastReceivedBid) : 0;
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49 | double nextUtil = nextBid != null ? u.getUtility(nextBid) : 0;
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50 |
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51 | // Accept
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52 | if (nextUtil <= lastUtil)
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53 | return new Accept(lastReceivedOffer);
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54 | // Counter offer based actions
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55 | else
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56 | {
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57 | try {
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58 | Thread.sleep(5000);
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59 | } catch (InterruptedException e) {
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60 | // TODO Auto-generated catch block
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61 | e.printStackTrace();
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62 | }
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63 | return new Bid(nextBid);
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64 | }
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65 |
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66 | }
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67 |
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68 | /**
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69 | * Get the next bid we should do
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70 | */
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71 | protected Bundle getNextBid()
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72 | {
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73 | OutcomeSpace outcomeSpace = negotiationContext.getOutcomeSpace();
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74 | return outcomeSpace.getBidNearUtility(getTargetUtility(), u, this);
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75 | }
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76 |
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77 | @Override
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78 | protected void receiveOffer(Offer o)
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79 | {
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80 | lastReceivedOffer = o;
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81 | }
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82 |
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83 | @Override
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84 | protected void receiveOutcome(Outcome outcome)
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85 | {
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86 | System.out.println(this + " is done with outcome " + outcome + ". Should clean up now.");
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87 | }
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88 |
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89 | /**
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90 | * Only the best bid is good enough.
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91 | */
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92 | private double getTargetUtility()
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93 | {
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94 | return 1.0;
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95 | }
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96 |
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97 | @Override
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98 | protected Offer sendOpeningOffer()
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99 | {
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100 | return null;
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101 | }
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102 |
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103 | /**
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104 | * Messaging with the coordinator can happen below
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105 | */
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106 | @Override
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107 | protected void receiveCoordinationMessage(CoordinationMessage cpoll)
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108 | {
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109 | // Update the utility function
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110 | u = cpoll.getUtilityFunction();
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111 | }
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112 |
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113 | @Override
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114 | protected StatusMessage sendStatusMessage()
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115 | {
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116 | return null;
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117 | }
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118 | }
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