1 | package com.framsticks.hosting; |
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2 | |
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3 | import org.apache.logging.log4j.Level; |
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4 | import org.apache.logging.log4j.Logger; |
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5 | import org.apache.logging.log4j.LogManager; |
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6 | |
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7 | import com.framsticks.params.ParamFlags; |
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8 | import com.framsticks.params.annotations.AutoAppendAnnotation; |
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9 | import com.framsticks.params.annotations.FramsClassAnnotation; |
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10 | import com.framsticks.params.annotations.ParamAnnotation; |
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11 | import com.framsticks.structure.Tree; |
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12 | import com.framsticks.util.FramsticksException; |
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13 | import com.framsticks.util.dispatching.AbstractJoinable; |
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14 | import com.framsticks.util.dispatching.Dispatching; |
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15 | import com.framsticks.util.dispatching.Joinable; |
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16 | import com.framsticks.util.dispatching.JoinableCollection; |
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17 | import com.framsticks.util.dispatching.JoinableParent; |
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18 | import com.framsticks.util.dispatching.JoinableState; |
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19 | import com.framsticks.util.dispatching.RunAt; |
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20 | import com.framsticks.util.dispatching.ThrowExceptionHandler; |
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21 | |
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22 | import java.io.IOException; |
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23 | import java.net.InetSocketAddress; |
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24 | import java.net.ServerSocket; |
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25 | import java.net.Socket; |
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26 | import java.util.TimerTask; |
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27 | |
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28 | import com.framsticks.util.dispatching.Thread; |
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29 | |
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30 | @FramsClassAnnotation |
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31 | public class Server extends AbstractJoinable implements JoinableParent { |
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32 | |
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33 | private final static Logger log = LogManager.getLogger(Server.class); |
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34 | |
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35 | protected int port; |
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36 | |
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37 | protected ServerSocket acceptSocket; |
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38 | protected Tree hosted; |
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39 | protected final JoinableCollection<ClientAtServer> clients = new JoinableCollection<ClientAtServer>(JoinableCollection.FinishPolicy.Never); |
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40 | |
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41 | public static class Accept { |
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42 | }; |
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43 | |
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44 | protected Thread<Accept> acceptThread = new Thread<>(); |
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45 | |
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46 | /** |
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47 | * |
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48 | */ |
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49 | public Server() { |
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50 | log.debug("created server"); |
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51 | port = 9009; |
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52 | } |
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53 | |
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54 | /** |
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55 | * @return the port |
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56 | */ |
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57 | @ParamAnnotation |
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58 | public int getPort() { |
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59 | return port; |
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60 | } |
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61 | |
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62 | /** |
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63 | * @param port the port to set |
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64 | */ |
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65 | @ParamAnnotation(flags = ParamFlags.USERREADONLY) |
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66 | public void setPort(int port) { |
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67 | this.port = port; |
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68 | } |
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69 | |
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70 | |
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71 | /** |
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72 | * @return the hosted |
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73 | */ |
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74 | public Tree getHosted() { |
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75 | return hosted; |
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76 | } |
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77 | |
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78 | @AutoAppendAnnotation |
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79 | public void setHosted(Tree hosted) { |
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80 | if (this.hosted != null) { |
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81 | throw new FramsticksException().msg("hosted tree is already set").arg("current", this.hosted); |
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82 | } |
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83 | this.hosted = hosted; |
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84 | acceptThread.setName(hosted.getName() + " acceptor"); |
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85 | clients.setObservableName(hosted.getName() + " clients"); |
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86 | } |
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87 | |
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88 | @Override |
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89 | public void childChangedState(Joinable joinable, JoinableState state) { |
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90 | proceedToState(state); |
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91 | } |
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92 | |
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93 | @Override |
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94 | @ParamAnnotation |
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95 | public String getName() { |
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96 | return hosted != null ? hosted.getName() : "server"; |
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97 | } |
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98 | |
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99 | protected void acceptNext() { |
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100 | if (!isRunning()) { |
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101 | log.debug("server is not in running state, aborting accepting"); |
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102 | return; |
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103 | } |
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104 | acceptThread.dispatch(new RunAt<Accept>(hosted) { |
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105 | @Override |
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106 | protected void runAt() { |
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107 | try { |
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108 | log.debug("accepting"); |
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109 | final Socket socket = acceptSocket.accept(); |
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110 | assert socket != null; |
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111 | log.debug("accepted socket: {}", socket.getInetAddress().getHostAddress()); |
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112 | hosted.dispatch(new RunAt<Tree>(this) { |
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113 | @Override |
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114 | protected void runAt() { |
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115 | ClientAtServer client = new ClientAtServer(Server.this, socket); |
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116 | clients.add(client); |
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117 | log.info("client connected: {}", client); |
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118 | } |
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119 | }); |
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120 | } catch (IOException e) { |
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121 | log.log((isRunning() ? Level.ERROR : Level.DEBUG), "failed to accept socket: {}", e); |
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122 | } |
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123 | acceptNext(); |
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124 | } |
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125 | }); |
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126 | } |
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127 | |
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128 | protected void tryBind(int when) { |
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129 | Dispatching.getTimer().schedule(new TimerTask() { |
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130 | |
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131 | @Override |
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132 | public void run() { |
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133 | acceptThread.dispatch(new RunAt<Accept>(ThrowExceptionHandler.getInstance()) { |
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134 | @Override |
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135 | protected void runAt() { |
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136 | try { |
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137 | acceptSocket.bind(new InetSocketAddress(port)); |
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138 | log.debug("started accepting on port {}", port); |
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139 | acceptNext(); |
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140 | return; |
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141 | } catch (IOException e) { |
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142 | log.warn("failed to accept on port {} (repeating): ", port, e); |
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143 | } |
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144 | tryBind(1000); |
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145 | } |
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146 | }); |
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147 | } |
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148 | |
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149 | }, when); |
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150 | } |
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151 | |
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152 | |
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153 | @Override |
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154 | protected void joinableStart() { |
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155 | Dispatching.use(acceptThread, this); |
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156 | Dispatching.use(hosted, this); |
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157 | Dispatching.use(clients, this); |
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158 | try { |
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159 | acceptSocket = new ServerSocket(); |
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160 | acceptSocket.setReuseAddress(true); |
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161 | } catch (IOException e) { |
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162 | throw new FramsticksException().msg("failed to create server socket").cause(e); |
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163 | } |
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164 | tryBind(0); |
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165 | } |
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166 | |
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167 | @Override |
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168 | protected void joinableInterrupt() { |
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169 | Dispatching.drop(acceptThread, this); |
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170 | Dispatching.drop(hosted, this); |
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171 | Dispatching.drop(clients, this); |
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172 | |
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173 | try { |
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174 | acceptSocket.close(); |
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175 | } catch (IOException e) { |
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176 | log.debug("exception caught during socket closing: ", e); |
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177 | } |
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178 | |
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179 | finishJoinable(); |
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180 | } |
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181 | |
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182 | @Override |
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183 | protected void joinableFinish() { |
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184 | |
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185 | } |
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186 | |
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187 | @Override |
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188 | protected void joinableJoin() throws InterruptedException { |
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189 | Dispatching.join(acceptThread); |
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190 | Dispatching.join(hosted); |
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191 | Dispatching.join(clients); |
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192 | } |
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193 | |
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194 | } |
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