1 | |
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2 | /** |
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3 | * Mazilu Sinziana |
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4 | * |
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5 | * EZCab Client Entity |
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6 | */ |
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7 | package vnsim.applications.ezcab; |
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8 | |
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9 | import java.io.IOException; |
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10 | import java.io.Serializable; |
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11 | import java.nio.ByteBuffer; |
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12 | |
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13 | import vnsim.core.Communicator; |
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14 | import vnsim.core.Engine; |
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15 | import vnsim.core.events.SendEvent; |
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16 | import vnsim.map.object.Globals; |
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17 | import vnsim.network.dsrc.CarRunningDSRC; |
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18 | |
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19 | public class EzcabClient extends CarRunningDSRC{ |
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20 | |
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21 | private int entityType; /*type of entity: client or taxi car*/ |
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22 | private int state; /* state of client */ |
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23 | |
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24 | private int sendingTime; /* time of first request */ |
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25 | private int periodicalTime; /* periodical sending time */ |
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26 | private EzcabMessage newMessage; |
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27 | |
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28 | public EzcabClient(int state, int vehicleId, byte lane, double speed, short roadIdx, |
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29 | short pointIdx, byte direction,double offset) { |
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30 | super(vehicleId, lane, speed, roadIdx, pointIdx, direction, offset); |
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31 | |
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32 | this.entityType = EzcabGlobals.CLIENT; |
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33 | this.state = state; |
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34 | |
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35 | /* we create the message */ |
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36 | sendingTime = Globals.engine.crtTime; |
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37 | periodicalTime = Globals.engine.crtTime; |
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38 | |
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39 | this.newMessage = new EzcabRequest(Globals.PROT_EZCAB, EzcabGlobals.REQUEST, this.vehicleId, |
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40 | EzcabGlobals.MAX_HOPS, Globals.engine.crtTime); |
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41 | SendEvent e = new SendEvent(Globals.engine.crtTime, this, Globals.TYPE_EZCAB); |
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42 | e.setMessageObject(newMessage); |
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43 | Globals.engine.schedEvent(e); |
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44 | |
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45 | System.out.println("Scheduled event with id "+Globals.TYPE_EZCAB); |
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46 | } |
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47 | |
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48 | public EzcabClient(int vehicleId, byte lane, double speed, short roadIdx, |
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49 | short pointIdx, byte direction,double offset) { |
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50 | super(vehicleId, lane, speed, roadIdx, pointIdx, direction, offset); |
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51 | |
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52 | this.entityType = EzcabGlobals.CLIENT; |
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53 | this.state = EzcabGlobals.WAITING_STATE; |
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54 | |
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55 | /* we create the message */ |
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56 | sendingTime = Globals.engine.crtTime; |
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57 | periodicalTime = Globals.engine.crtTime; |
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58 | |
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59 | this.newMessage = new EzcabRequest(Globals.PROT_EZCAB, EzcabGlobals.REQUEST, this.vehicleId, |
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60 | EzcabGlobals.MAX_HOPS, Globals.engine.crtTime); |
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61 | SendEvent e = new SendEvent(Globals.engine.crtTime, this, Globals.TYPE_EZCAB); |
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62 | e.setMessageObject(this.newMessage); |
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63 | Globals.engine.schedEvent(e); |
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64 | try { |
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65 | Engine.bwClient.write("client: " + this.vehicleId + " sending: "+ |
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66 | (float)Globals.engine.crtTime / Globals.SECOND *1000 + "\n"); |
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67 | Engine.bwClient.flush(); |
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68 | |
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69 | } catch (IOException e1) { |
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70 | e1.printStackTrace(); |
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71 | } |
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72 | |
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73 | System.out.println("Scheduled event with id " + Globals.TYPE_EZCAB); |
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74 | |
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75 | } |
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76 | |
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77 | public void onReceive(byte[] bytesReceived, Serializable m, Communicator sender){ |
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78 | |
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79 | if (!isEquipped) |
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80 | return; |
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81 | |
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82 | if(bytesReceived == null){ |
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83 | processMessage(m); |
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84 | return; |
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85 | } |
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86 | |
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87 | byte header = bytesReceived[0]; |
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88 | |
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89 | switch(header) |
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90 | { |
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91 | case Globals.PROT_EZCAB: |
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92 | processMessage(m); |
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93 | break; |
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94 | |
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95 | default: |
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96 | super.onReceive(bytesReceived, m, sender); |
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97 | } |
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98 | } |
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99 | |
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100 | public void processMessage(Serializable m) { |
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101 | |
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102 | if( (((long)(Globals.engine.getCrtTime() - this.periodicalTime)/Globals.SECOND * 1000) > EzcabGlobals.TIMEOUT) |
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103 | && (this.state != EzcabGlobals.BUSY_STATE)){ |
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104 | /* make a new request */ |
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105 | this.newMessage = new EzcabRequest(Globals.PROT_EZCAB, EzcabGlobals.REQUEST, this.vehicleId, |
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106 | EzcabGlobals.MAX_HOPS, this.sendingTime); |
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107 | SendEvent e = new SendEvent(Globals.engine.crtTime, this, Globals.TYPE_EZCAB); |
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108 | e.setMessageObject(this.newMessage); |
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109 | } |
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110 | |
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111 | |
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112 | if(m == null) |
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113 | return; |
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114 | |
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115 | if( (m instanceof EzcabRequest) || (m instanceof EzcabAck) ){ |
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116 | return; |
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117 | } |
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118 | |
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119 | if(m instanceof EzcabResponse){ |
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120 | EzcabResponse res = (EzcabResponse)m; |
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121 | int idCab = res.getIdFreeCab(); |
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122 | int idClient = res.getIdClient(); |
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123 | |
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124 | if(idClient == this.vehicleId && this.state != EzcabGlobals.BUSY_STATE){ |
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125 | System.out.println("client: " + idClient + ", masina: " + idCab); |
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126 | this.state = EzcabGlobals.BUSY_STATE; |
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127 | /* randomize the answer of the client */ |
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128 | //if(System.currentTimeMillis() % 2 == 0){ |
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129 | this.newMessage = new EzcabAck(Globals.PROT_EZCAB, EzcabGlobals.ACK, this.vehicleId, idCab, EzcabGlobals.MAX_HOPS); |
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130 | //} |
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131 | //else |
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132 | // this.newMessage = null; |
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133 | } |
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134 | } |
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135 | |
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136 | SendEvent e = new SendEvent(Globals.engine.crtTime, this, Globals.TYPE_EZCAB); |
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137 | e.setMessageObject(this.newMessage); |
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138 | Globals.engine.schedEvent(e); |
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139 | |
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140 | } |
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141 | |
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142 | |
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143 | public byte[] prepareMessage(int messageType){ |
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144 | |
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145 | byte[] bytesToSend=null; |
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146 | |
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147 | if ( (!isEquipped) || (this.newMessage == null) ) |
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148 | return null; |
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149 | |
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150 | if(messageType == Globals.TYPE_EZCAB){ |
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151 | |
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152 | if(this.newMessage instanceof EzcabRequest){ |
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153 | EzcabRequest request = (EzcabRequest)this.newMessage; |
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154 | ByteBuffer bb = ByteBuffer.allocate(17); |
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155 | |
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156 | bb.put(request.getProtType()); //bb.put(Globals.PROT_EZCAB); |
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157 | bb.putInt(request.getMessageType()); //bb.putInt(EzcabGlobals.REQUEST); |
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158 | bb.putInt(request.getIdClient()); |
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159 | bb.putInt(request.getNoHops()); |
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160 | bb.putInt(request.getTimeOfSending()); |
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161 | |
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162 | bytesToSend = bb.array(); |
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163 | } |
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164 | if(this.newMessage instanceof EzcabAck){ |
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165 | EzcabAck ack = (EzcabAck)this.newMessage; |
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166 | ByteBuffer bb = ByteBuffer.allocate(17); |
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167 | |
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168 | bb.put(ack.getProtType()); //bb.put(Globals.PROT_EZCAB); |
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169 | bb.putInt(ack.getMessageType()); //bb.putInt(EzcabGlobals.ACK); |
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170 | bb.putInt(ack.getIdClient()); |
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171 | bb.putInt(ack.getIdCab()); |
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172 | bb.putInt(ack.getNoHops()); |
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173 | |
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174 | bytesToSend = bb.array(); |
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175 | } |
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176 | return bytesToSend; |
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177 | } |
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178 | else{ |
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179 | return super.prepareMessage(messageType); |
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180 | } |
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181 | } |
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182 | |
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183 | } |
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