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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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407
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11 import rep.SessionManager;
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193
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12 import rep.channel.REPLogger;
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308
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13 import rep.channel.REPSelectionKey;
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14 import rep.channel.REPSelector;
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15 import rep.channel.REPSocketChannel;
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284
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16 import test.Text;
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17
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18
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297
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19 /**
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20 * @author kono
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411
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21 * Basic Remote Editor client implementation
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22 * should support multi-session
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23 * currently multi-session requires new channel, that is
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24 * only one session for this editor.
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25 */
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193
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26 public class TestEditor extends Thread{
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284
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27 private InetSocketAddress semaIP;
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28 private REPLogger ns;
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284
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29 private int seq = 0;
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30 public Text text;
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285
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31 public LinkedList<REPCommand> cmds;
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286
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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 REPCommand nop = new REPCommand(REP.REPCMD_NOP, 0, 0, 0, 0, "");
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36 boolean running = true;
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37 long timeout = 1;
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297
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38 private String name;
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298
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39 private boolean inputLock=false;
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40 public boolean detached=false;
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41 public boolean master=false;
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387
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42 REPCommand quit=null;
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43 private int syncCounter=0;
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421
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44 private boolean hasInputLock=true;
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334
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45 private int port;
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46 private REPSelector<REPCommand> selector;
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47 private boolean syncEnable=false;
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284
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48
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49
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50 public TestEditor(String name, String _host,int _port, boolean master){
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51 super(name);
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52 LinkedList<REPCommand>cmdList = new LinkedList<REPCommand>();
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53 String[] txts = {
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54 //"aaa", "bbb", // "ccc", "ddd", "eee",
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303
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55 };
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56 port = _port;
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57 semaIP = new InetSocketAddress(_host, _port);
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58 ns = REPLogger.singleton();
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59 this.name = name;
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60 cmds = cmdList;
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61 if (master) {
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62 this.master=true;
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63 text = new Text(txts);
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64 cmds.add(new REPCommand(REP.SMCMD_PUT,0,0,0,0,name+"-file"));
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65 cmds.add(new REPCommand(REP.REPCMD_INSERT_USER,0,0,0,0,"m0"));
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66 cmds.add(new REPCommand(REP.REPCMD_INSERT_USER,0,0,0,0,"m1"));
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67 cmds.add(new REPCommand(REP.SMCMD_QUIT,0,0,0,0,""));
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68 } else {
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69 text = new Text(new String[0]);
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70 cmds.add(new REPCommand(REP.SMCMD_JOIN,0,0,0,0,name));
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71 cmds.add(new REPCommand(REP.REPCMD_INSERT_USER,0,0,0,0,"c0"));
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72 cmds.add(new REPCommand(REP.REPCMD_INSERT_USER,0,0,0,0,"c1"));
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73 }
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74 }
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75
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76 public TestEditor(String name, String _host,int _port, boolean master,
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77 String[] txts,LinkedList<REPCommand> cmdList){
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78 super(name);
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79 port = _port;
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80 semaIP = new InetSocketAddress(_host, _port);
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81 ns = REPLogger.singleton();
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82 this.name = name;
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83 cmds = cmdList;
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84 if (master) {
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85 this.master=true;
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86 text = new Text(txts);
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386
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87 } else {
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88 text = new Text(new String[0]);
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89 }
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90 }
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91
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92 public void run(){
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93 /*
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94 * Create Socket and connect to the session manager
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95 */
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96 try {
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97 channel = REPSocketChannel.<REPCommand>create(new REPCommandPacker());
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98 } catch (IOException e) { return; }
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99
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100 ns.writeLog("try to connect to SessionManager whose ip is "+semaIP+" "+name, 1);
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101 try {
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102 while (!channel.connect(semaIP)){
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103 ns.writeLog("SeMa not listen to socket yet, wait", 1);
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104 }
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105 } catch (IOException e) { return; }
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106 ns.writeLog("successes to connect "+name);
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107 /*
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108 * Start editor main loop
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109 * public REPCommand(REP cmd,int sid,int eid, int seq, int lineno, String string)
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110 */
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111 try {
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112 mainloop();
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113 } catch (IOException e) {
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114 }
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115 }
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116
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302
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117 /*
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118 * Editor main loop with input lock
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119 */
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120 private void mainloop() throws IOException {
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121
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122 channel.configureBlocking(false);
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123 REPSelector<REPCommand> selector = REPSelector.create();
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124 channel.register(selector, SelectionKey.OP_READ);
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125 this.selector = selector;
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126 while(running) {
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127 if (inputLock) {
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128 // No user input during merge mode (optional)
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129 if (selector.select(0)>0) {
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130 handle(channel.read());
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131 }
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132 continue;
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133 } else if (selector.select(timeout)<=0) {
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134 if (syncCounter>0) {
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135 syncText(); // send the master editor buffer to clients.
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136 }
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137 userInput();
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138 }
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139 // selector(timeout) returns 0, but it may contain readable channel..
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140 for(REPSelectionKey<REPCommand> key : selector.selectedKeys1()) {
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141 REPSocketChannel<REPCommand> ch = key.channel1();
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142 handle(ch.read());
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143 }
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144 }
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145 }
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146
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147 private void syncText() {
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148 /*
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149 * Send delete/insert one at a time to synchronize
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150 * all clients. SYNC is requested by the session manager.
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151 */
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152 if (syncCounter>text.size()) {
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153 SessionManager.logger.writeLog("Sync Completed.");
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154 syncCounter=0;
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155 } else {
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156 if (inputLock) return;
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157 int i=syncCounter-1;
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158 REPCommand del = new REPCommand(REP.REPCMD_DELETE_USER,sid,eid,0,i, text.get(i));
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159 REPCommand ins = new REPCommand(REP.REPCMD_INSERT_USER,sid,eid,0,i, text.get(i));
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315
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160 sendCommand(del);
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161 sendCommand(ins);
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162 syncCounter++;
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163 }
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164 }
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165
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302
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166 /*
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167 * Simulate User Input
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168 */
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169 private void userInput() {
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170 REPCommand cmd = cmds.poll();
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171 if (cmd!=null) {
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172 switch(cmd.cmd) {
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400
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173 case REPCMD_INSERT_USER:
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174 text.insert(cmd.lineno, cmd.string);
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175 sendCommand(cmd);
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176 break;
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177 case REPCMD_DELETE_USER:
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178 String del = text.delete(cmd.lineno);
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179 cmd.setString(del);
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180 sendCommand(cmd);
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181 break;
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182 case SMCMD_QUIT:
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183 /*
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184 * start termination phase 1 by the master editor.
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185 * after this command do not send any user input.
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186 * clients simply disconnect from the session manager.
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187 */
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188 cmds.clear();
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189 cmd.eid = -1;
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190 quit = cmd;
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191 break;
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192 case SMCMD_JOIN:
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193 case SMCMD_PUT:
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194 sendCommand(cmd);
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302
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195 /*
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196 * To prevent confusion, stop user input until the ack
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197 */
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198 inputLock = true; // wait until ACK
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199 break;
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200 default:
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201 assert(false);
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202 }
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203 } else {
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204 if(syncCounter==0) {
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205 // no more command to send, and we don't have syncCounter
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206 timeout = 0;
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207 if (quit!=null) {
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208 if (quit.eid==-1)
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209 sendCommand(quit);
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210 else
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211 forwardCommand(quit);
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212 quit=null;
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213 }
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214 }
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215 }
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216 }
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217
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218
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219 private void sendCommand(REPCommand cmd1) {
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220 REPCommand cmd = new REPCommand(cmd1);
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221 cmd.setSEQID(seq++);
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222 cmd.setEID(eid);
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223 cmd.setSID(sid);
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224 ns.writeLog(name +" send "+cmd);
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225 channel.write(cmd);
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226 }
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227
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315
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228 private void forwardCommand(REPCommand cmd1) {
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229 REPCommand cmd = new REPCommand(cmd1);
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230 ns.writeLog(name +" forward "+cmd);
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231 channel.write(cmd);
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232 }
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233
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234 private void handle(REPCommand cmd) {
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235 if (cmd==null) return;
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236 ns.writeLog(name +": read "+cmd + " textsize="+text.size());
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237 switch(cmd.cmd) {
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297
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238 case REPCMD_INSERT :
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405
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239 if (cmd.eid!=eid) {
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240 text.insert(cmd.lineno, cmd.string);
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241 }
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315
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242 forwardCommand(cmd);
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297
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243 break;
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244 case REPCMD_DELETE :
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405
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245 if (cmd.eid!=eid) {
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246 String del="";
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407
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247 if(cmd.lineno<text.size()) {
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405
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248 del = text.delete(cmd.lineno);
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249 }
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250 cmd.setString(del);
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333
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251 }
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315
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252 forwardCommand(cmd);
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253 break;
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405
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254 case REPCMD_NOP :
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255 case REPCMD_INSERT_ACK :
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256 case REPCMD_DELETE_ACK :
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257 forwardCommand(cmd);
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258 break;
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259 case REPCMD_CLOSE :
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260 case REPCMD_CLOSE_2 :
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261 assert(false);
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262 break;
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263
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405
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264 case SMCMD_JOIN_ACK :
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265 sid = cmd.sid;
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266 eid = cmd.eid;
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267 name += "(eid="+eid+",sid="+sid+")";
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268 inputLock = false;
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269 break;
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270 case SMCMD_PUT_ACK :
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271 sid = cmd.sid;
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272 eid = cmd.eid;
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273 name += "(eid="+eid+",sid="+sid+")";
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274 inputLock = false;
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275 break;
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276 case SMCMD_QUIT :
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277 if (cmd.eid!=eid)
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413
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278 quit = cmd;
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279 else // eid=-1 means do not forward but send it.
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280 quit = new REPCommand(REP.SMCMD_QUIT_2,
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281 sid, -1, seq, 0, "");
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282 timeout=1;
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405
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283 // stop input processing after this command
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284 cmds.clear();
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285 break;
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286 case SMCMD_START_MERGE :
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287 // lock user input during merge (optional)
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288 inputLock = hasInputLock;
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289 cmd.cmd = REP.SMCMD_START_MERGE_ACK;
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290 sendCommand(cmd);
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291 break;
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292 case SMCMD_END_MERGE :
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293 inputLock = false;
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294 break;
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295 case SMCMD_QUIT_2 :
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296 if (cmd.eid!=eid) {
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297 forwardCommand(cmd);
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298 } else {
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299 cmd.cmd = REP.SMCMD_QUIT_2_ACK;
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300 sendCommand(cmd);
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301 }
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302 running = false;
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303 dumpText();
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405
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304 break;
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305 case SMCMD_SYNC:
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306 // start contents sync with newly joined editor
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307 cmd.cmd = REP.SMCMD_SYNC_ACK;
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308 forwardCommand(cmd);
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309 //if (cmd.eid==eid) {
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310 if (master && syncEnable ) {
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311 syncCounter = 1;
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312 timeout = 1;
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313 }
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314 break;
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315 default:
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316 assert(false);
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317 break;
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285
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318 }
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284
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319 }
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313
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320
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334
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321
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421
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322 private void dumpText() {
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323 ns.writeLog("Final "+text);
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324 }
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325
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334
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326 public int getPort() {
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327 return port;
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328 }
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342
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329
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330 public synchronized void setCommand(LinkedList<REPCommand> cmds) {
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331 this.cmds = cmds;
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332 timeout=1;
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333 if(selector!=null) selector.wakeup();
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334 }
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193
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335 }
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