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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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308
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12 import rep.channel.REPSelectionKey;
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285
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13 import rep.channel.REPSelector;
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14 import rep.channel.REPSocketChannel;
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284
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15 import test.Text;
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16
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17
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297
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18 /**
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19 * @author kono
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20 * Basic Temote Editor client implementation
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21 * should support multi-session
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22 * currently multi-session requires new channel, that is
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23 * only one session for this editor.
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24 */
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193
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25 public class TestEditor extends Thread{
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284
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26 private InetSocketAddress semaIP;
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27 private REPLogger ns;
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28 private int seq = 0;
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313
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29 private int prevSeq = 0;
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30 public Text text;
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31 public LinkedList<REPCommand> cmds;
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32 private int eid = 0;
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33 private int sid = 0;
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34 REPSocketChannel<REPCommand> channel;
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35 boolean running = true;
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36 long timeout = 1;
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297
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37 private String name;
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298
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38 private boolean inputLock=false;
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39 public boolean detached=false;
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40 public boolean master=false;
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303
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41 private int syncCounter=0;
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42 private boolean hasInputLock=true;
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43
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44
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45 public TestEditor(String name, String _host,int _port, boolean master){
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46 super(name);
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47 LinkedList<REPCommand>cmdList = new LinkedList<REPCommand>();
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48 String[] txts = {
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49 "aaa", "bbb", "ccc", "ddd", "eee",
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50 };
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51 semaIP = new InetSocketAddress(_host, _port);
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52 ns = REPLogger.singleton();
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53 this.name = name;
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54 cmds = cmdList;
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55 if (master) {
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56 this.master=true;
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57 text = new Text(txts);
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58 cmds.add(new REPCommand(REP.SMCMD_PUT,0,0,0,0,name+"-file"));
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59 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"m0"));
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60 //cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"m0"));
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61 //cmds.add(new REPCommand(REP.SMCMD_QUIT,0,0,0,0,""));
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285
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62 } else {
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63 text = new Text(new String[0]);
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64 cmds.add(new REPCommand(REP.SMCMD_JOIN,0,0,0,0,name));
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65 //cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"c0"));
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66 //cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"c0"));
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303
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67 }
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68 }
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69
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70 public TestEditor(String name, String _host,int _port, boolean master,
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71 String[] txts,LinkedList<REPCommand> cmdList){
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72 super(name);
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73 semaIP = new InetSocketAddress(_host, _port);
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74 ns = REPLogger.singleton();
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75 this.name = name;
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76 cmds = cmdList;
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77 if (master) {
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78 this.master=true;
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79 text = new Text(txts);
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80 }
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81 }
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82
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83 public void run(){
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84 /*
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85 * Create Socket and connect to the session manager
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86 */
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87 try {
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88 channel = REPSocketChannel.<REPCommand>create(new REPCommandPacker());
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285
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89 } catch (IOException e) { return; }
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90
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91 ns.writeLog("try to connect to SessionManager whose ip is "+semaIP+" "+name, 1);
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92 try {
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93 while (!channel.connect(semaIP)){
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94 ns.writeLog("SeMa not listen to socket yet, wait", 1);
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95 }
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96 } catch (IOException e) { return; }
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97 ns.writeLog("successes to connect "+name);
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98 /*
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99 * Start editor main loop
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100 * public REPCommand(REP cmd,int sid,int eid, int seq, int lineno, String string)
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101 */
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102 try {
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103 mainloop();
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104 } catch (IOException e) {
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105 }
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106 }
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107
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108 /*
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109 * Editor main loop with input lock
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110 */
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111 private void mainloop() throws IOException {
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112
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113 channel.configureBlocking(false);
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114 REPSelector<REPCommand> selector = REPSelector.create();
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115 channel.register(selector, SelectionKey.OP_READ);
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116 while(running) {
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298
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117 if (inputLock) {
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118 // No user input during merge mode (optional)
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119 if (selector.select(0)>0) {
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120 handle(channel.read());
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121 }
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122 continue;
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123 } else if (selector.select(timeout)<=0) {
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124 if (syncCounter>0) {
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125 syncText(); // send the master editor buffer to clients.
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126 }
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127 userInput();
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128 }
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129 // selector(timeout) returns 0, but it may contain readable channel..
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130 for(REPSelectionKey<REPCommand> key : selector.selectedKeys1()) {
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131 REPSocketChannel<REPCommand> ch = key.channel1();
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132 handle(ch.read());
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133 }
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134 }
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135 }
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136
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137 private void syncText() {
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138 /*
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139 * Send delete/insert one at a time to synchronize
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140 * all clients. SYNC is requested by the session manager.
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141 */
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300
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142 if (syncCounter>text.size()) {
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143 syncCounter=0;
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144 } else {
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145 int i=syncCounter-1;
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146 REPCommand del = new REPCommand(REP.REPCMD_DELETE,sid,eid,0,i, text.get(i));
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147 REPCommand ins = new REPCommand(REP.REPCMD_INSERT,sid,eid,0,i, text.get(i));
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148 sendCommand(del,seq++);
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149 sendCommand(ins,seq++);
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300
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150 syncCounter++;
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151 }
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152 }
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153
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302
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154 /*
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155 * Simulate User Input
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156 */
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157 private void userInput() {
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158 REPCommand cmd = cmds.poll();
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159 if (cmd!=null) {
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297
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160 switch(cmd.cmd) {
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161 case REPCMD_INSERT:
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162 text.insert(cmd.lineno, cmd.string);
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163 sendCommand(cmd,seq++);
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164 break;
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165 case REPCMD_DELETE:
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166 String del = text.delete(cmd.lineno);
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167 cmd.setString(del);
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168 sendCommand(cmd,seq++);
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169 break;
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170 case SMCMD_QUIT:
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302
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171 /*
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172 * start termination phase 1 by the master editor.
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173 * after this command do not send any user input.
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174 * clients simply disconnect from the session manager.
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175 */
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176 cmds.clear();
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177 sendCommand(cmd,seq++);
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178 break;
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179 case SMCMD_JOIN:
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180 case SMCMD_PUT:
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181 sendCommand(cmd,seq++);
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182 prevSeq = seq;
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302
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183 /*
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184 * To prevent confusion, stop user input until the ack
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185 */
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186 inputLock = true; // wait until ACK
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187 break;
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188 default:
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189 assert(false);
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190 }
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288
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191 } else {
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192 // no more command to send
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193 timeout = 0;
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194 }
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195 }
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197
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198 private void sendCommand(REPCommand cmd1,int seq) {
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199 REPCommand cmd = new REPCommand(cmd1);
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200 cmd.setSEQID(seq);
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201 cmd.setEID(eid);
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202 cmd.setSID(sid);
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203 ns.writeLog(name +" send "+cmd);
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204 channel.write(cmd);
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205 }
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206
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207 private void handle(REPCommand cmd) {
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208 if (cmd==null) return;
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209 ns.writeLog(name +": read "+cmd);
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210 switch(cmd.cmd) {
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211 case REPCMD_INSERT :
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212 text.insert(cmd.lineno, cmd.string);
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213 if (cmd.eid==REP.MERGE_EID.id) break;
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214 addNop();
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215 sendCommand(cmd,cmd.seq);
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216 break;
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217 case REPCMD_INSERT_ACK :
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218 assert(false);
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219 break;
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220 case REPCMD_DELETE :
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221 String del = text.delete(cmd.lineno);
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222 if (cmd.eid==REP.MERGE_EID.id) break;
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223 addNop();
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224 cmd.setString(del);
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225 sendCommand(cmd,cmd.seq);
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226 break;
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227 case REPCMD_DELETE_ACK :
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228 assert(false);
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229 break;
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230 case REPCMD_NOP :
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231 if (cmd.eid==REP.MERGE_EID.id) break;
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232 addNop();
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233 sendCommand(cmd,cmd.seq);
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234 break; case REPCMD_CLOSE :
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235 case REPCMD_CLOSE_2 :
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236 assert(false);
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237 break;
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238
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239 case SMCMD_JOIN_ACK :
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240 sid = cmd.sid;
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241 eid = cmd.eid;
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300
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242 inputLock = false;
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243 break;
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244 case SMCMD_PUT_ACK :
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245 sid = cmd.sid;
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246 eid = cmd.eid;
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300
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247 inputLock = false;
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286
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248 break;
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249 case SMCMD_QUIT :
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250 if (false) {
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251 if (cmd.eid!=eid)
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252 sendCommand(cmd,cmd.seq);
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253 else
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254 sendCommand(new REPCommand(REP.SMCMD_QUIT_2,
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255 sid, eid, seq, 0, ""),seq++);
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256 }
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298
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257 cmds.clear();
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258 break;
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286
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259 case SMCMD_QUIT_ACK :
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298
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260 assert(false);
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261 break;
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262 case SMCMD_START_MERGE :
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263 // lock user input during merge (optional)
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264 inputLock = hasInputLock;
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265 cmd.cmd = REP.SMCMD_START_MERGE_ACK;
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266 sendCommand(cmd,seq++);
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267 break;
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268 case SMCMD_START_MERGE_ACK :
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269 assert(false);
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270 break;
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271 case SMCMD_END_MERGE :
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272 inputLock = false;
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273 break;
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274 case SMCMD_QUIT_2 :
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303
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275 if (cmd.eid!=eid) {
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276 sendCommand(cmd,cmd.seq);
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277 }
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286
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278 running = false;
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279 break;
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298
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280 case SMCMD_SYNC:
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281 // start contents sync with newly joined editor
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302
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282 cmd.cmd = REP.SMCMD_SYNC_ACK; sendCommand(cmd,cmd.seq);
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283 if (cmd.eid==eid)
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284 syncCounter = 1;
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298
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285 break;
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286
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286 default:
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287 assert(false);
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288 break;
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285
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289 }
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284
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290 }
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313
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291
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292 private void addNop() {
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293 if (seq!=prevSeq) return;
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294 // We haven't send any command, add nop before retransmition.
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295 REPCommand nop = new REPCommand(REP.REPCMD_NOP, sid, eid, seq, 0, "");
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296 sendCommand(nop,seq++);
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297 prevSeq = seq;
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298 }
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193
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299 }
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