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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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342
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45 private REPSelector<REPCommand> selector;
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284
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46
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47
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48 public TestEditor(String name, String _host,int _port, boolean master){
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193
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49 super(name);
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50 LinkedList<REPCommand>cmdList = new LinkedList<REPCommand>();
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51 String[] txts = {
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52 "aaa", "bbb", "ccc", "ddd", "eee",
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53 };
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334
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54 port = _port;
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55 semaIP = new InetSocketAddress(_host, _port);
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56 ns = REPLogger.singleton();
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57 this.name = name;
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303
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58 cmds = cmdList;
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59 if (master) {
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60 this.master=true;
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61 text = new Text(txts);
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62 cmds.add(new REPCommand(REP.SMCMD_PUT,0,0,0,0,name+"-file"));
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285
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63 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"m0"));
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333
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64 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"m0"));
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65 cmds.add(new REPCommand(REP.SMCMD_QUIT,0,0,0,0,""));
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285
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66 } else {
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67 text = new Text(new String[0]);
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68 cmds.add(new REPCommand(REP.SMCMD_JOIN,0,0,0,0,name));
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333
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69 cmds.add(new REPCommand(REP.REPCMD_INSERT,0,0,0,0,"c0"));
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70 cmds.add(new REPCommand(REP.REPCMD_DELETE,0,0,0,0,"c0"));
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303
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71 }
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72 }
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73
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74 public TestEditor(String name, String _host,int _port, boolean master,
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75 String[] txts,LinkedList<REPCommand> cmdList){
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76 super(name);
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77 port = _port;
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78 semaIP = new InetSocketAddress(_host, _port);
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79 ns = REPLogger.singleton();
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80 this.name = name;
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81 cmds = cmdList;
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82 if (master) {
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83 this.master=true;
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84 text = new Text(txts);
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285
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85 }
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86 }
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87
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88 public void run(){
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302
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89 /*
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90 * Create Socket and connect to the session manager
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91 */
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92 try {
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93 channel = REPSocketChannel.<REPCommand>create(new REPCommandPacker());
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285
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94 } catch (IOException e) { return; }
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95
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96 ns.writeLog("try to connect to SessionManager whose ip is "+semaIP+" "+name, 1);
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97 try {
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98 while (!channel.connect(semaIP)){
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99 ns.writeLog("SeMa not listen to socket yet, wait", 1);
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100 }
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285
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101 } catch (IOException e) { return; }
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102 ns.writeLog("successes to connect "+name);
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103 /*
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104 * Start editor main loop
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105 * public REPCommand(REP cmd,int sid,int eid, int seq, int lineno, String string)
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106 */
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107 try {
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108 mainloop();
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109 } catch (IOException e) {
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110 }
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111 }
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112
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302
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113 /*
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114 * Editor main loop with input lock
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115 */
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116 private void mainloop() throws IOException {
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117
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118 channel.configureBlocking(false);
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119 REPSelector<REPCommand> selector = REPSelector.create();
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120 channel.register(selector, SelectionKey.OP_READ);
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121 this.selector = selector;
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122 while(running) {
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123 if (inputLock) {
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124 // No user input during merge mode (optional)
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125 if (selector.select(0)>0) {
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126 handle(channel.read());
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127 }
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128 continue;
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129 } else if (selector.select(timeout)<=0) {
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130 if (syncCounter>0) {
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131 syncText(); // send the master editor buffer to clients.
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132 }
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133 userInput();
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134 }
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135 // selector(timeout) returns 0, but it may contain readable channel..
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136 for(REPSelectionKey<REPCommand> key : selector.selectedKeys1()) {
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137 REPSocketChannel<REPCommand> ch = key.channel1();
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138 handle(ch.read());
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139 }
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140 }
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141 }
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142
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300
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143 private void syncText() {
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144 /*
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145 * Send delete/insert one at a time to synchronize
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146 * all clients. SYNC is requested by the session manager.
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147 */
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300
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148 if (syncCounter>text.size()) {
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149 syncCounter=0;
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150 } else {
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151 int i=syncCounter-1;
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152 REPCommand del = new REPCommand(REP.REPCMD_DELETE,sid,eid,0,i, text.get(i));
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153 REPCommand ins = new REPCommand(REP.REPCMD_INSERT,sid,eid,0,i, text.get(i));
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315
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154 sendCommand(del);
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155 sendCommand(ins);
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300
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156 syncCounter++;
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157 }
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158 }
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159
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302
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160 /*
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161 * Simulate User Input
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162 */
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288
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163 private void userInput() {
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164 REPCommand cmd = cmds.poll();
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165 if (cmd!=null) {
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297
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166 switch(cmd.cmd) {
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167 case REPCMD_INSERT:
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168 text.insert(cmd.lineno, cmd.string);
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169 sendCommand(cmd);
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170 break;
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171 case REPCMD_DELETE:
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172 String del = text.delete(cmd.lineno);
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173 cmd.setString(del);
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174 sendCommand(cmd);
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175 break;
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176 case SMCMD_QUIT:
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302
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177 /*
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178 * start termination phase 1 by the master editor.
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179 * after this command do not send any user input.
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180 * clients simply disconnect from the session manager.
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181 */
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182 cmds.clear();
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183 sendCommand(cmd);
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184 break;
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185 case SMCMD_JOIN:
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186 case SMCMD_PUT:
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187 sendCommand(cmd);
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188 prevSeq = seq;
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302
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189 /*
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190 * To prevent confusion, stop user input until the ack
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191 */
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192 inputLock = true; // wait until ACK
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193 break;
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194 default:
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195 assert(false);
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196 }
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288
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197 } else {
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198 // no more command to send
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199 timeout = 0;
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200 }
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201 }
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202
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203
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204 private void sendCommand(REPCommand cmd1) {
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205 REPCommand cmd = new REPCommand(cmd1);
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206 cmd.setSEQID(seq++);
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207 cmd.setEID(eid);
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208 cmd.setSID(sid);
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209 ns.writeLog(name +" send "+cmd);
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210 channel.write(cmd);
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211 }
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212
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315
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213 private void forwardCommand(REPCommand cmd1) {
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214 REPCommand cmd = new REPCommand(cmd1);
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215 ns.writeLog(name +" forward "+cmd);
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216 channel.write(cmd);
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217 }
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218
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285
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219 private void handle(REPCommand cmd) {
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308
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220 if (cmd==null) return;
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297
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221 ns.writeLog(name +": read "+cmd);
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285
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222 switch(cmd.cmd) {
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297
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223 case REPCMD_INSERT :
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224 text.insert(cmd.lineno, cmd.string);
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225 if (cmd.eid!=REP.MERGE_EID.id)
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226 addNop();
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227 forwardCommand(cmd);
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228 break;
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229 case REPCMD_INSERT_ACK :
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230 assert(false);
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231 break;
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232 case REPCMD_DELETE :
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233 String del="";
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234 if(cmd.lineno>text.size()) {
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235 del = text.delete(cmd.lineno);
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236 }
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315
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237 if (cmd.eid!=REP.MERGE_EID.id)
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238 addNop();
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297
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239 cmd.setString(del);
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240 forwardCommand(cmd);
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297
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241 break;
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286
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242 case REPCMD_DELETE_ACK :
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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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313
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245 case REPCMD_NOP :
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315
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246 if (cmd.eid!=REP.MERGE_EID.id)
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247 addNop();
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248 forwardCommand(cmd);
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313
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249 break; case REPCMD_CLOSE :
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286
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250 case REPCMD_CLOSE_2 :
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298
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251 assert(false);
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286
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252 break;
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253
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286
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254 case SMCMD_JOIN_ACK :
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255 sid = cmd.sid;
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256 eid = cmd.eid;
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328
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257 name += "(eid="+eid+",sid="+sid+")";
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300
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258 inputLock = false;
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286
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259 break;
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260 case SMCMD_PUT_ACK :
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261 sid = cmd.sid;
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262 eid = cmd.eid;
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263 name += "(eid="+eid+",sid="+sid+")";
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300
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264 inputLock = false;
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265 break;
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266 case SMCMD_QUIT :
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267 if (cmd.eid!=eid)
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268 forwardCommand(cmd);
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269 else
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270 sendCommand(new REPCommand(REP.SMCMD_QUIT_2,
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271 sid, eid, seq, 0, ""));
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318
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272 // stop input processing after this command
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273 cmds.clear();
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274 break;
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286
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275 case SMCMD_QUIT_ACK :
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298
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276 assert(false);
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286
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277 break;
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278 case SMCMD_START_MERGE :
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298
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279 // lock user input during merge (optional)
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280 inputLock = hasInputLock;
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281 cmd.cmd = REP.SMCMD_START_MERGE_ACK;
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315
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282 sendCommand(cmd);
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298
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283 break;
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286
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284 case SMCMD_START_MERGE_ACK :
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298
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285 assert(false);
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286
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286 break;
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287 case SMCMD_END_MERGE :
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298
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288 inputLock = false;
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289 break;
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290 case SMCMD_QUIT_2 :
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291 if (cmd.eid!=eid) {
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315
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292 forwardCommand(cmd);
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341
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293 } else {
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294 cmd.cmd = REP.SMCMD_QUIT_2_ACK;
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295 sendCommand(cmd);
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303
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296 }
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286
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297 running = false;
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298 break;
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298
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299 case SMCMD_SYNC:
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300 // start contents sync with newly joined editor
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315
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301 cmd.cmd = REP.SMCMD_SYNC_ACK;
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302 forwardCommand(cmd);
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302
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303 if (cmd.eid==eid)
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304 syncCounter = 1;
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298
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305 break;
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286
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306 default:
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307 assert(false);
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308 break;
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285
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309 }
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284
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310 }
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313
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311
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312 private void addNop() {
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313 if (seq!=prevSeq) return;
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314 // We haven't send any command, add nop before retransmition.
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315
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315 sendCommand(nop);
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313
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316 prevSeq = seq;
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317 }
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334
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318
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319 public int getPort() {
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320 return port;
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321 }
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342
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322
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323 public synchronized void setCommand(LinkedList<REPCommand> cmds) {
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324 this.cmds = cmds;
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325 timeout=1;
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326 if(selector!=null) selector.wakeup();
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327 }
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193
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328 }
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