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1 package test.sematest;
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2
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3 import java.io.IOException;
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4 import java.net.InetSocketAddress;
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285
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5 import java.nio.channels.SelectionKey;
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6 import java.util.LinkedList;
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193
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7
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8 import rep.REP;
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9 import rep.REPCommand;
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10 import rep.REPCommandPacker;
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11 import rep.channel.REPLogger;
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285
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12 import rep.channel.REPSelector;
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13 import rep.channel.REPSocketChannel;
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14 import test.Text;
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15
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16
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297
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17 /**
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18 * @author kono
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19 * Basic Temote Editor client implementation
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20 * should support multi-session
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21 * currently multi-session requires new channel, that is
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22 * only one session for this editor.
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23 */
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24 public class TestEditor extends Thread{
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284
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25 private InetSocketAddress semaIP;
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26 private REPLogger ns;
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27 private int seq = 0;
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28 public Text text;
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29 public LinkedList<REPCommand> cmds;
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30 private int eid = 0;
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31 private int sid = 0;
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32 REPSocketChannel<REPCommand> channel;
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33 boolean running = true;
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34 long timeout = 1;
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35 private String name;
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36 private REPCommand nop = new REPCommand(REP.REPCMD_NOP,0,0,0,0,"");
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37 private boolean inputLock=false;
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38 public boolean detached=false;
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39 public boolean master=false;
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303
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40 private int syncCounter=0;
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41 private boolean hasInputLock=true;
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42
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43
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44 public TestEditor(String name, String _host,int _port, boolean master){
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45 super(name);
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46 LinkedList<REPCommand>cmdList = new LinkedList<REPCommand>();
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47 String[] txts = {
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48 "aaa", "bbb", "ccc", "ddd", "eee",
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49 };
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50 semaIP = new InetSocketAddress(_host, _port);
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51 ns = REPLogger.singleton();
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52 this.name = name;
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53 cmds = cmdList;
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54 if (master) {
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55 this.master=true;
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56 text = new Text(txts);
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57 cmds.add(new REPCommand(REP.SMCMD_PUT,0,0,0,0,name+"-file"));
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58 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"m0"));
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59 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"m0"));
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60 cmds.add(new REPCommand(REP.SMCMD_QUIT,0,0,0,0,""));
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61 } else {
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62 text = new Text(new String[0]);
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63 cmds.add(new REPCommand(REP.SMCMD_JOIN,0,0,0,0,name));
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64 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"c0"));
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65 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"c0"));
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303
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66 }
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67 }
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68
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69 public TestEditor(String name, String _host,int _port, boolean master,
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70 String[] txts,LinkedList<REPCommand> cmdList){
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71 super(name);
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72 semaIP = new InetSocketAddress(_host, _port);
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73 ns = REPLogger.singleton();
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74 this.name = name;
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75 cmds = cmdList;
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76 if (master) {
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77 this.master=true;
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78 text = new Text(txts);
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79 }
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80 }
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81
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82 public void run(){
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83 /*
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84 * Create Socket and connect to the session manager
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85 */
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86 try {
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87 channel = REPSocketChannel.<REPCommand>create(new REPCommandPacker());
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88 } catch (IOException e) { return; }
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89
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90 ns.writeLog("try to connect to SessionManager whose ip is "+semaIP+" "+name, 1);
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91 try {
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92 while (!channel.connect(semaIP)){
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93 ns.writeLog("SeMa not listen to socket yet, wait", 1);
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94 }
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95 } catch (IOException e) { return; }
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96 ns.writeLog("successes to connect "+name);
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97 /*
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98 * Start editor main loop
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99 * public REPCommand(REP cmd,int sid,int eid, int seq, int lineno, String string)
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100 */
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101 try {
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102 mainloop();
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103 } catch (IOException e) {
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104 }
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105 }
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106
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107 /*
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108 * Editor main loop with input lock
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109 */
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110 private void mainloop() throws IOException {
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111
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112 channel.configureBlocking(false);
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113 REPSelector<REPCommand> selector = REPSelector.create();
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114 channel.register(selector, SelectionKey.OP_READ);
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115 while(running) {
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116 if (inputLock) {
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117 // No user input during merge mode (optional)
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118 if (selector.select(0)>0) {
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119 handle(channel.read());
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120 }
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121 continue;
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122 } else if (selector.select(timeout)<=0) {
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123 if (syncCounter>0) {
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124 syncText(); // send the master editor buffer to clients.
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125 }
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126 userInput();
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127 } else {
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128 handle(channel.read());
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129 }
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130 }
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131 }
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132
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133 private void syncText() {
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134 /*
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135 * Send delete/insert one at a time to synchronize
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136 * all clients. SYNC is requested by the session manager.
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137 */
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138 if (syncCounter>text.size()) {
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139 syncCounter=0;
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140 } else {
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141 int i=syncCounter-1;
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142 REPCommand del = new REPCommand(REP.REPCMD_DELETE,sid,eid,0,i, text.get(i));
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143 REPCommand ins = new REPCommand(REP.REPCMD_INSERT,sid,eid,0,i, text.get(i));
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144 sendCommand(del,seq++);
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145 sendCommand(ins,seq++);
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146 syncCounter++;
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147 }
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148 }
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149
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150 /*
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151 * Simulate User Input
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152 */
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153 private void userInput() {
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154 REPCommand cmd = cmds.poll();
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155 if (cmd!=null) {
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156 switch(cmd.cmd) {
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157 case REPCMD_INSERT:
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158 text.insert(cmd.lineno, cmd.string);
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159 sendCommand(cmd,seq++);
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160 break;
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161 case REPCMD_DELETE:
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162 String del = text.delete(cmd.lineno);
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163 cmd.setString(del);
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164 sendCommand(cmd,seq++);
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165 break;
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166 case SMCMD_QUIT:
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302
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167 /*
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168 * start termination phase 1 by the master editor.
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169 * after this command do not send any user input.
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170 * clients simply disconnect from the session manager.
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171 */
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172 cmds.clear();
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173 sendCommand(cmd,seq++);
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174 break;
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175 case SMCMD_JOIN:
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176 case SMCMD_PUT:
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177 sendCommand(cmd,seq++);
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178 /*
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179 * To prevent confusion, stop user input until the ack
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180 */
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181 inputLock = true; // wait until ACK
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182 break;
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183 default:
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184 assert(false);
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185 }
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186 } else {
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187 // no more command to send
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188 timeout = 0;
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189 }
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190 }
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193 private void sendCommand(REPCommand cmd,int seq) {
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194 cmd.setSEQID(seq);
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195 cmd.setEID(eid);
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196 cmd.setSID(sid);
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197 ns.writeLog(name +" send "+cmd);
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198 channel.write(cmd);
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199 }
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200
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201 private void handle(REPCommand cmd) {
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202 ns.writeLog(name +": read "+cmd);
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203 switch(cmd.cmd) {
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204 case REPCMD_INSERT :
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205 text.insert(cmd.lineno, cmd.string);
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206 sendCommand(cmd,cmd.seq);
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207 // sendCommand(nop); session manager do this for me
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208 break;
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209 case REPCMD_INSERT_ACK :
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210 assert(false);
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211 break;
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212 case REPCMD_DELETE :
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213 String del = text.delete(cmd.lineno);
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214 cmd.setString(del);
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215 sendCommand(cmd,cmd.seq);
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216 // sendCommand(nop); session manager do this for me
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217 break;
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218 case REPCMD_DELETE_ACK :
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219 assert(false);
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220 break;
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221 case REPCMD_CLOSE :
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222 case REPCMD_CLOSE_2 :
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223 assert(false);
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224 break;
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225 case REPCMD_NOP :
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226 sendCommand(cmd,cmd.seq);
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227 sendCommand(nop,seq++);
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228 break;
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229 case SMCMD_JOIN_ACK :
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230 sid = cmd.sid;
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231 eid = cmd.eid;
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232 inputLock = false;
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233 break;
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234 case SMCMD_PUT_ACK :
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235 sid = cmd.sid;
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236 eid = cmd.eid;
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237 inputLock = false;
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238 break;
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239 case SMCMD_QUIT :
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240 if (cmd.eid!=eid)
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241 sendCommand(cmd,cmd.seq);
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242 else
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243 sendCommand(new REPCommand(REP.SMCMD_QUIT_2,
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244 sid, eid, seq, 0, ""),seq++);
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245 cmds.clear();
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246 break;
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247 case SMCMD_QUIT_ACK :
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298
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248 assert(false);
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286
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249 break;
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250 case SMCMD_START_MERGE :
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251 // lock user input during merge (optional)
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252 inputLock = hasInputLock;
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253 cmd.cmd = REP.SMCMD_START_MERGE_ACK;
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254 sendCommand(cmd,seq++);
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255 break;
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256 case SMCMD_START_MERGE_ACK :
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257 assert(false);
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258 break;
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259 case SMCMD_END_MERGE :
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260 inputLock = false;
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261 break;
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262 case SMCMD_QUIT_2 :
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263 if (cmd.eid!=eid) {
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264 sendCommand(cmd,cmd.seq);
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265 }
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266 running = false;
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267 break;
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268 case SMCMD_SYNC:
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269 // start contents sync with newly joined editor
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270 cmd.cmd = REP.SMCMD_SYNC_ACK; sendCommand(cmd,cmd.seq);
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271 if (cmd.eid==eid)
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272 syncCounter = 1;
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273 break;
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274 default:
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275 assert(false);
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276 break;
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277 }
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284
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278 }
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279 }
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