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