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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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193
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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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193
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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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334
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43 private boolean hasInputLock=false;
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44 private int port;
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284
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45
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46
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47 public TestEditor(String name, String _host,int _port, boolean master){
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193
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48 super(name);
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49 LinkedList<REPCommand>cmdList = new LinkedList<REPCommand>();
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50 String[] txts = {
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51 "aaa", "bbb", "ccc", "ddd", "eee",
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52 };
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334
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53 port = _port;
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54 semaIP = new InetSocketAddress(_host, _port);
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55 ns = REPLogger.singleton();
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297
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56 this.name = name;
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57 cmds = cmdList;
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58 if (master) {
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59 this.master=true;
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60 text = new Text(txts);
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61 cmds.add(new REPCommand(REP.SMCMD_PUT,0,0,0,0,name+"-file"));
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62 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"m0"));
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333
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63 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"m0"));
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64 cmds.add(new REPCommand(REP.SMCMD_QUIT,0,0,0,0,""));
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285
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65 } else {
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66 text = new Text(new String[0]);
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67 cmds.add(new REPCommand(REP.SMCMD_JOIN,0,0,0,0,name));
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333
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68 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"c0"));
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69 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"c0"));
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303
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70 }
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71 }
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72
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73 public TestEditor(String name, String _host,int _port, boolean master,
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74 String[] txts,LinkedList<REPCommand> cmdList){
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75 super(name);
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76 port = _port;
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77 semaIP = new InetSocketAddress(_host, _port);
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78 ns = REPLogger.singleton();
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79 this.name = name;
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80 cmds = cmdList;
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81 if (master) {
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82 this.master=true;
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83 text = new Text(txts);
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285
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84 }
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193
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85 }
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86
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87 public void run(){
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302
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88 /*
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89 * Create Socket and connect to the session manager
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90 */
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91 try {
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92 channel = REPSocketChannel.<REPCommand>create(new REPCommandPacker());
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285
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93 } catch (IOException e) { return; }
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94
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95 ns.writeLog("try to connect to SessionManager whose ip is "+semaIP+" "+name, 1);
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96 try {
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97 while (!channel.connect(semaIP)){
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98 ns.writeLog("SeMa not listen to socket yet, wait", 1);
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99 }
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285
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100 } catch (IOException e) { return; }
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101 ns.writeLog("successes to connect "+name);
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102 /*
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103 * Start editor main loop
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104 * public REPCommand(REP cmd,int sid,int eid, int seq, int lineno, String string)
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105 */
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106 try {
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107 mainloop();
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108 } catch (IOException e) {
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109 }
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110 }
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111
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302
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112 /*
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113 * Editor main loop with input lock
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114 */
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115 private void mainloop() throws IOException {
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116
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117 channel.configureBlocking(false);
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118 REPSelector<REPCommand> selector = REPSelector.create();
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119 channel.register(selector, SelectionKey.OP_READ);
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120 while(running) {
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121 if (inputLock) {
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122 // No user input during merge mode (optional)
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123 if (selector.select(0)>0) {
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124 handle(channel.read());
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125 }
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126 continue;
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127 } else if (selector.select(timeout)<=0) {
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128 if (syncCounter>0) {
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129 syncText(); // send the master editor buffer to clients.
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130 }
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131 userInput();
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132 }
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133 // selector(timeout) returns 0, but it may contain readable channel..
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134 for(REPSelectionKey<REPCommand> key : selector.selectedKeys1()) {
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135 REPSocketChannel<REPCommand> ch = key.channel1();
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136 handle(ch.read());
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137 }
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138 }
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139 }
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140
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300
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141 private void syncText() {
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302
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142 /*
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143 * Send delete/insert one at a time to synchronize
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144 * all clients. SYNC is requested by the session manager.
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145 */
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300
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146 if (syncCounter>text.size()) {
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147 syncCounter=0;
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148 } else {
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149 int i=syncCounter-1;
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150 REPCommand del = new REPCommand(REP.REPCMD_DELETE,sid,eid,0,i, text.get(i));
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151 REPCommand ins = new REPCommand(REP.REPCMD_INSERT,sid,eid,0,i, text.get(i));
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315
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152 sendCommand(del);
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153 sendCommand(ins);
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300
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154 syncCounter++;
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155 }
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156 }
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157
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302
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158 /*
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159 * Simulate User Input
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160 */
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288
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161 private void userInput() {
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162 REPCommand cmd = cmds.poll();
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163 if (cmd!=null) {
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297
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164 switch(cmd.cmd) {
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165 case REPCMD_INSERT:
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166 text.insert(cmd.lineno, cmd.string);
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167 sendCommand(cmd);
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168 break;
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169 case REPCMD_DELETE:
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170 String del = text.delete(cmd.lineno);
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171 cmd.setString(del);
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172 sendCommand(cmd);
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173 break;
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174 case SMCMD_QUIT:
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302
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175 /*
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176 * start termination phase 1 by the master editor.
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177 * after this command do not send any user input.
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178 * clients simply disconnect from the session manager.
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179 */
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180 cmds.clear();
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181 sendCommand(cmd);
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182 break;
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183 case SMCMD_JOIN:
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184 case SMCMD_PUT:
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185 sendCommand(cmd);
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186 prevSeq = seq;
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302
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187 /*
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188 * To prevent confusion, stop user input until the ack
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189 */
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190 inputLock = true; // wait until ACK
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191 break;
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192 default:
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193 assert(false);
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194 }
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288
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195 } else {
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196 // no more command to send
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197 timeout = 0;
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198 }
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199 }
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200
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201
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202 private void sendCommand(REPCommand cmd1) {
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203 REPCommand cmd = new REPCommand(cmd1);
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204 cmd.setSEQID(seq++);
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205 cmd.setEID(eid);
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206 cmd.setSID(sid);
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207 ns.writeLog(name +" send "+cmd);
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208 channel.write(cmd);
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209 }
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210
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315
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211 private void forwardCommand(REPCommand cmd1) {
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212 REPCommand cmd = new REPCommand(cmd1);
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213 ns.writeLog(name +" forward "+cmd);
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214 channel.write(cmd);
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215 }
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216
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217 private void handle(REPCommand cmd) {
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308
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218 if (cmd==null) return;
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219 ns.writeLog(name +": read "+cmd);
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220 switch(cmd.cmd) {
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297
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221 case REPCMD_INSERT :
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222 text.insert(cmd.lineno, cmd.string);
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315
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223 if (cmd.eid!=REP.MERGE_EID.id)
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224 addNop();
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225 forwardCommand(cmd);
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226 break;
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227 case REPCMD_INSERT_ACK :
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228 assert(false);
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229 break;
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230 case REPCMD_DELETE :
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333
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231 String del="";
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232 if(cmd.lineno>text.size()) {
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233 del = text.delete(cmd.lineno);
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234 }
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315
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235 if (cmd.eid!=REP.MERGE_EID.id)
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236 addNop();
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297
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237 cmd.setString(del);
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315
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238 forwardCommand(cmd);
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239 break;
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286
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240 case REPCMD_DELETE_ACK :
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298
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241 assert(false);
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286
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242 break;
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313
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243 case REPCMD_NOP :
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315
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244 if (cmd.eid!=REP.MERGE_EID.id)
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245 addNop();
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246 forwardCommand(cmd);
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313
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247 break; case REPCMD_CLOSE :
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286
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248 case REPCMD_CLOSE_2 :
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298
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249 assert(false);
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286
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250 break;
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313
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251
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286
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252 case SMCMD_JOIN_ACK :
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253 sid = cmd.sid;
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254 eid = cmd.eid;
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328
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255 name += "(eid="+eid+",sid="+sid+")";
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300
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256 inputLock = false;
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257 break;
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258 case SMCMD_PUT_ACK :
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259 sid = cmd.sid;
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260 eid = cmd.eid;
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328
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261 name += "(eid="+eid+",sid="+sid+")";
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300
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262 inputLock = false;
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263 break;
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264 case SMCMD_QUIT :
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265 if (cmd.eid!=eid)
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266 forwardCommand(cmd);
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267 else
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268 sendCommand(new REPCommand(REP.SMCMD_QUIT_2,
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269 sid, eid, seq, 0, ""));
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318
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270 // stop input processing after this command
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271 cmds.clear();
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272 break;
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286
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273 case SMCMD_QUIT_ACK :
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298
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274 assert(false);
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286
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275 break;
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276 case SMCMD_START_MERGE :
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298
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277 // lock user input during merge (optional)
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278 inputLock = hasInputLock;
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279 cmd.cmd = REP.SMCMD_START_MERGE_ACK;
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315
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280 sendCommand(cmd);
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298
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281 break;
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286
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282 case SMCMD_START_MERGE_ACK :
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298
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283 assert(false);
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286
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284 break;
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285 case SMCMD_END_MERGE :
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298
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286 inputLock = false;
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286
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287 break;
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288 case SMCMD_QUIT_2 :
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303
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289 if (cmd.eid!=eid) {
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315
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290 forwardCommand(cmd);
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341
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291 } else {
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292 cmd.cmd = REP.SMCMD_QUIT_2_ACK;
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293 sendCommand(cmd);
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303
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294 }
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286
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295 running = false;
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296 break;
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298
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297 case SMCMD_SYNC:
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298 // start contents sync with newly joined editor
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315
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299 cmd.cmd = REP.SMCMD_SYNC_ACK;
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300 forwardCommand(cmd);
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302
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301 if (cmd.eid==eid)
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302 syncCounter = 1;
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298
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303 break;
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286
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304 default:
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305 assert(false);
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306 break;
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285
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307 }
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284
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308 }
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313
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309
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310 private void addNop() {
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311 if (seq!=prevSeq) return;
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312 // We haven't send any command, add nop before retransmition.
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315
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313 sendCommand(nop);
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313
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314 prevSeq = seq;
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315 }
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334
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316
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317 public int getPort() {
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318 return port;
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319 }
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193
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320 }
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