1 | package bargainingchips.players;
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2 |
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3 | import java.util.concurrent.BlockingQueue;
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4 |
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5 | import bargainingchips.NegotiationContext;
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6 | import bargainingchips.actions.Offer;
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7 | import bargainingchips.actions.OfferBy;
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8 | import bargainingchips.utilityfunctions.UtilityFunction;
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9 | /**
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10 | * An agent typically has a buyer or seller role and can send an receive offers.
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11 | * An agent has a utility function for evaluating any proposal in a given negotiation context.
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12 | */
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13 | public abstract class Agent implements Runnable
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14 | {
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15 | protected String name;
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16 | protected UtilityFunction u;
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17 | protected NegotiationContext negotiationContext;
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18 |
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19 | int k;
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20 |
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21 | public Agent(String name, UtilityFunction u, NegotiationContext negotiationContext,
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22 | BlockingQueue<Offer> in, BlockingQueue<OfferBy> out,
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23 | BlockingQueue<CoordinationMessage> cin, BlockingQueue<StatusMessage> cout)
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24 | {
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25 | this.name = name;
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26 | this.u = u;
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27 | this.negotiationContext = negotiationContext;
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28 | this.in = in;
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29 | this.out = out;
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30 | this.cin = cin;
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31 | this.cout = cout;
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32 | k = 0;
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33 | }
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34 |
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35 | // Messaging from and to the opponent
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36 | protected BlockingQueue<Offer> in;
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37 | protected BlockingQueue<OfferBy> out;
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38 | // Messaging from and to the coordinator
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39 | protected BlockingQueue<CoordinationMessage> cin;
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40 | protected BlockingQueue<StatusMessage> cout;
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41 |
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42 | protected abstract void receiveOffer(Offer bundle);
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43 |
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44 | protected abstract Offer sendOffer();
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45 |
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46 | protected abstract Offer sendOpeningOffer();
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47 |
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48 | protected abstract void receiveCoordinationMessage(CoordinationMessage cpoll);
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49 |
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50 | protected abstract StatusMessage sendStatusMessage();
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51 |
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52 | @Override
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53 | public void run()
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54 | {
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55 | // A buyer may send an opening offer
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56 | Offer opening = do_sendOpeningOffer();
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57 | if (opening != null)
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58 | try {
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59 | out.put(new OfferBy(name, opening));
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60 | } catch (InterruptedException e1) {
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61 | e1.printStackTrace();
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62 | }
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63 |
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64 | while (true)
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65 | {
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66 | try
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67 | {
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68 | // Wait for either a message from coordinator or an incoming offer from seller
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69 | while (true)
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70 | {
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71 | CoordinationMessage cpoll = cin.poll();
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72 | if (cpoll != null)
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73 | {
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74 | do_receiveCoordinationMessage(cpoll);
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75 | break;
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76 | }
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77 |
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78 | Offer poll = in.poll();
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79 | if (poll != null)
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80 | {
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81 | do_receiveOffer(poll);
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82 | break;
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83 | }
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84 | }
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85 |
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86 | // A sync happened, so we can send out a new offer, given the new information
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87 | Offer sendOffer = do_sendOffer();
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88 | out.put(new OfferBy(name, sendOffer));
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89 |
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90 | // Pause
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91 | Thread.sleep(500);
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92 | }
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93 | catch (InterruptedException e) {
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94 | e.printStackTrace();
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95 | }
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96 | }
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97 | }
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98 |
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99 | private void do_receiveCoordinationMessage(CoordinationMessage cpoll)
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100 | {
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101 | System.out.println(this + " received coordination msg " + cpoll);
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102 | receiveCoordinationMessage(cpoll);
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103 | }
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104 |
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105 | protected void do_receiveOffer(Offer o)
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106 | {
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107 | System.out.println(this + " received " + o
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108 | + (o.isBid() ? (", with util = " + u.getUtility(o.getBundle())) : "")
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109 | );
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110 | receiveOffer(o);
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111 | }
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112 |
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113 | protected Offer do_sendOffer()
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114 | {
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115 | Offer o = sendOffer();
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116 | System.out.println(this + " sends " + o);
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117 | k++;
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118 | return o;
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119 | }
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120 |
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121 | protected Offer do_sendOpeningOffer()
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122 | {
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123 | Offer o = sendOpeningOffer();
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124 | if (o != null)
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125 | {
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126 | System.out.println(this + " sends opening offer " + o);
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127 | k++;
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128 | }
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129 | return o;
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130 | }
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131 |
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132 | @Override
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133 | public String toString()
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134 | {
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135 | return "#" + k + ": " + name;
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136 | }
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137 |
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138 | public String toDescription()
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139 | {
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140 | return name + " with u = " + u;
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141 | }
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142 | }
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