1 | package com.framsticks.remote; |
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2 | |
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3 | import com.framsticks.communication.*; |
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4 | import com.framsticks.communication.queries.GetRequest; |
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5 | import com.framsticks.communication.queries.InfoRequest; |
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6 | import com.framsticks.communication.queries.SetRequest; |
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7 | import com.framsticks.communication.util.LoggingSubscriptionCallback; |
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8 | import com.framsticks.core.ListChange; |
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9 | import com.framsticks.core.Path; |
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10 | import com.framsticks.params.*; |
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11 | import com.framsticks.params.types.EventParam; |
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12 | import com.framsticks.parsers.MultiParamLoader; |
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13 | import com.framsticks.core.Instance; |
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14 | import com.framsticks.util.*; |
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15 | import com.framsticks.util.dispatching.Dispatching; |
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16 | import com.framsticks.util.dispatching.Future; |
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17 | import com.framsticks.util.lang.Casting; |
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18 | import com.framsticks.util.lang.Pair; |
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19 | import com.framsticks.util.dispatching.RunAt; |
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20 | |
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21 | import org.apache.commons.configuration.Configuration; |
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22 | import org.apache.log4j.Logger; |
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23 | |
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24 | import java.util.*; |
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25 | |
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26 | /** |
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27 | * @author Piotr Sniegowski |
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28 | */ |
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29 | public class RemoteInstance extends Instance { |
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30 | |
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31 | private final static Logger log = Logger.getLogger(RemoteInstance.class.getName()); |
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32 | |
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33 | protected Path simulator; |
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34 | protected ClientConnection connection; |
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35 | |
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36 | protected final Set<Pair<Path, Subscription<?>>> subscriptions = new HashSet<>(); |
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37 | |
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38 | public Pair<Path, Subscription<?>> getSubscription(Path path) { |
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39 | for (Pair<Path, Subscription<?>> s : subscriptions) { |
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40 | if (s.first.matches(path)) { |
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41 | return s; |
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42 | } |
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43 | } |
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44 | return null; |
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45 | } |
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46 | |
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47 | @Override |
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48 | public void run() { |
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49 | assert isActive(); |
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50 | super.run(); |
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51 | connection.connect(new StateFunctor() { |
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52 | @Override |
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53 | public void call(Exception e) { |
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54 | if (e != null) { |
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55 | fireRun(e); |
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56 | return; |
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57 | } |
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58 | connection.negotiateProtocolVersion(new StateFunctor() { |
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59 | @Override |
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60 | public void call(Exception e) { |
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61 | if (e != null) { |
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62 | log.fatal("unsupported protocol version!\n minimal version is: " |
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63 | + "nmanager protocol is: " |
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64 | + connection.getProtocolVersion()); |
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65 | connection.close(); |
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66 | fireRun(e); |
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67 | return; |
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68 | } |
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69 | |
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70 | invokeLater(new RunAt<Instance>() { |
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71 | @Override |
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72 | public void run() { |
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73 | resolveAndFetch("/simulator", new Future<Path>() { |
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74 | @Override |
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75 | public void result(Path path, Exception e) { |
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76 | if (e != null) { |
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77 | log.fatal("failed to resolve simulator node"); |
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78 | fireRun(e); |
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79 | return; |
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80 | } |
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81 | assert isActive(); |
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82 | simulator = path; |
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83 | fireRun(null); |
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84 | log.info("resolved simulator node"); |
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85 | |
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86 | EventParam param = getParam(simulator, "running_changed", EventParam.class); |
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87 | assert param != null; |
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88 | connection.subscribe(simulator.getTextual() + "/" + param.getId(), RemoteInstance.this, new LoggingSubscriptionCallback<Instance>(log, "server running state change", new EventCallback() { |
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89 | @Override |
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90 | public void call(List<File> files) { |
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91 | invokeLater(new RunAt<Instance>() { |
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92 | @Override |
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93 | public void run() { |
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94 | updateSimulationRunning(); |
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95 | } |
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96 | }); |
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97 | } |
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98 | })); |
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99 | new PeriodicTask<Instance>(RemoteInstance.this, 1000) { |
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100 | @Override |
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101 | public void run() { |
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102 | updateSimulationRunning(); |
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103 | again(); |
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104 | } |
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105 | }; |
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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 | } |
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111 | }); |
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112 | } |
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113 | }); |
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114 | } |
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115 | |
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116 | public RemoteInstance() { |
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117 | } |
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118 | |
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119 | |
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120 | @Override |
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121 | public void configure(Configuration config) { |
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122 | super.configure(config); |
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123 | connection = new ClientConnection(config.getString("address")); |
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124 | } |
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125 | |
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126 | |
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127 | public void setConnection(ClientConnection connection) { |
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128 | this.connection = connection; |
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129 | } |
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130 | |
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131 | @Override |
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132 | public String toString() { |
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133 | assert Dispatching.isThreadSafe(); |
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134 | return getConnection().getAddress(); |
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135 | } |
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136 | |
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137 | public void setRunning(final boolean running) { |
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138 | assert isActive(); |
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139 | //simulator.call(simulator.getParam(running ? "start" : "stop", ProcedureParam.class), new LoggingStateCallback(log, (running ? "starting" : "stopping") + " server")); |
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140 | } |
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141 | |
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142 | protected final UnaryListenersSet<Boolean> simulationRunningListeners = new UnaryListenersSet<Boolean>(); |
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143 | |
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144 | protected void updateSimulationRunning() { |
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145 | assert isActive(); |
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146 | /* |
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147 | fetchValue(simulator, getParam(simulator, "running", Param.class), new StateFunctor() { |
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148 | @Override |
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149 | public void call(Exception e) { |
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150 | if (e != null) { |
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151 | log.fatal("failed to query simulator running status: " + e); |
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152 | return; |
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153 | } |
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154 | |
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155 | invokeLater(new Runnable() { |
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156 | @Override |
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157 | public void run() { |
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158 | boolean value = bindAccess(simulator).get("running", Boolean.class); |
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159 | log.trace("server running: " + value); |
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160 | simulationRunningListeners.call(value); |
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161 | } |
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162 | }); |
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163 | |
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164 | } |
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165 | }); |
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166 | */ |
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167 | } |
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168 | |
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169 | public void addRunningStateListener(UnaryFunctor<Boolean, Boolean> listener) { |
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170 | assert isActive(); |
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171 | simulationRunningListeners.add(listener); |
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172 | } |
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173 | |
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174 | public void disconnect() { |
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175 | assert isActive(); |
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176 | if (connection.isConnected()) { |
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177 | connection.close(); |
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178 | } |
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179 | } |
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180 | |
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181 | public final ClientConnection getConnection() { |
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182 | return connection; |
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183 | } |
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184 | |
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185 | @Override |
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186 | public void fetchValue(final Path path, final Param param, final StateFunctor stateFunctor) { |
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187 | assert isActive(); |
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188 | assert param != null; |
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189 | assert path.isResolved(); |
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190 | connection.send(new GetRequest().field(param.getId()).path(path.getTextual()), this, new ResponseCallback<Instance>() { |
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191 | @Override |
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192 | public void process(Response response) { |
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193 | assert isActive(); |
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194 | if (!response.getOk()) { |
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195 | stateFunctor.call(new Exception(response.getComment())); |
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196 | return; |
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197 | } |
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198 | try { |
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199 | processFetchedValues(path, response.getFiles()); |
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200 | stateFunctor.call(null); |
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201 | } catch (Exception ex) { |
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202 | stateFunctor.call(ex); |
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203 | } |
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204 | } |
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205 | }); |
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206 | } |
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207 | |
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208 | protected final Map<String, Set<Future<FramsClass>>> infoRequests = new HashMap<String, Set<Future<FramsClass>>>(); |
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209 | |
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210 | protected void finishInfoRequest(String id, FramsClass result, Exception e) { |
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211 | assert isActive(); |
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212 | Set<Future<FramsClass>> futures = infoRequests.get(id); |
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213 | infoRequests.remove(id); |
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214 | for (Future<FramsClass> f : futures) { |
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215 | f.result(result, e); |
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216 | } |
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217 | } |
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218 | |
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219 | @Override |
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220 | protected void fetchInfo(final Path path, final Future<FramsClass> future) { |
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221 | |
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222 | final String name = path.getTop().getParam().getContainedTypeName(); |
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223 | |
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224 | if (infoRequests.containsKey(name)) { |
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225 | infoRequests.get(name).add(future); |
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226 | return; |
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227 | } |
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228 | |
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229 | log.debug("issuing info request for " + name); |
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230 | Set<Future<FramsClass>> futures = new HashSet<Future<FramsClass>>(); |
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231 | futures.add(future); |
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232 | infoRequests.put(name, futures); |
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233 | |
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234 | //TODO: if the info is in the cache, then don't communicate |
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235 | connection.send(new InfoRequest().path(path.getTextual()), this, new ResponseCallback<Instance>() { |
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236 | @Override |
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237 | public void process(Response response) { |
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238 | assert isActive(); |
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239 | if (!response.getOk()) { |
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240 | finishInfoRequest(name, null, new Exception(response.getComment())); |
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241 | return; |
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242 | } |
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243 | |
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244 | assert response.getFiles().size() == 1; |
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245 | assert path.isTheSame(response.getFiles().get(0).getPath()); |
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246 | FramsClass framsClass = processFetchedInfo(response.getFiles().get(0)); |
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247 | |
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248 | if (framsClass == null) { |
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249 | log.fatal("could not read class info"); |
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250 | finishInfoRequest(name, null, new Exception("could not read class info")); |
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251 | return; |
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252 | } |
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253 | CompositeParam thisParam = path.getTop().getParam(); |
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254 | if (!thisParam.isMatchingContainedName(framsClass.getId())) { |
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255 | String mismatch = "class name mismatch: param=" + thisParam.getContainedTypeName() + " differs from fetched=" + framsClass.getId(); |
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256 | log.error(mismatch); |
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257 | finishInfoRequest(name, null, new Exception(mismatch)); |
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258 | return; |
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259 | } |
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260 | finishInfoRequest(name, framsClass, null); |
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261 | } |
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262 | }); |
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263 | } |
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264 | |
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265 | @Override |
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266 | public void fetchValues(final Path path, final StateFunctor stateFunctor) { |
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267 | assert isActive(); |
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268 | assert path.getTop().getObject() != null; |
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269 | |
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270 | log.trace("fetching values for " + path); |
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271 | connection.send(new GetRequest().path(path.getTextual()), this, new ResponseCallback<Instance>() { |
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272 | @Override |
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273 | public void process(Response response) { |
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274 | assert isActive(); |
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275 | if (!response.getOk()) { |
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276 | stateFunctor.call(new Exception(response.getComment())); |
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277 | return; |
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278 | } |
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279 | try { |
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280 | processFetchedValues(path, response.getFiles()); |
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281 | stateFunctor.call(null); |
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282 | } catch (Exception ex) { |
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283 | log.error("an exception occurred while loading: " + ex); |
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284 | ex.printStackTrace(); |
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285 | stateFunctor.call(ex); |
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286 | } |
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287 | } |
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288 | }); |
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289 | } |
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290 | |
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291 | @Override |
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292 | public void resolve(final Path path, final Future<Path> future) { |
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293 | assert isActive(); |
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294 | if (path.getTop().getObject() != null) { |
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295 | if (getInfoFromCache(path) != null) { |
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296 | future.result(path, null); |
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297 | return; |
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298 | } |
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299 | findInfo(path, new Future<FramsClass>() { |
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300 | @Override |
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301 | public void result(FramsClass result, Exception e) { |
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302 | if (e != null) { |
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303 | future.result(null, e); |
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304 | return; |
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305 | } |
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306 | future.result(path, null); |
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307 | } |
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308 | }); |
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309 | return; |
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310 | } |
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311 | findInfo(path, new Future<FramsClass>() { |
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312 | @Override |
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313 | public void result(FramsClass result, Exception e) { |
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314 | assert isActive(); |
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315 | if (e != null) { |
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316 | future.result(null, e); |
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317 | return; |
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318 | } |
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319 | assert path.getTop().getParam().isMatchingContainedName(result.getId()); |
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320 | Path p = (path.getTop().getParam().getContainedTypeName() != null ? path : path.tryFindResolution()); |
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321 | future.result(createIfNeeded(p), null); |
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322 | } |
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323 | }); |
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324 | } |
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325 | |
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326 | @Override |
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327 | protected void tryRegisterOnChangeEvents(final Path path) { |
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328 | assert isActive(); |
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329 | AccessInterface access = bindAccess(path); |
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330 | if (!(access instanceof ListAccess)) { |
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331 | return; |
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332 | } |
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333 | |
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334 | |
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335 | assert path.size() >= 2; |
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336 | FramsClass underFramsClass = getInfoFromCache(path.getUnder().getParam().getContainedTypeName()); |
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337 | |
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338 | EventParam changedEvent = underFramsClass.getParamEntry(path.getTop().getParam().getId() + "_changed", EventParam.class); |
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339 | if (changedEvent == null) { |
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340 | return; |
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341 | } |
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342 | |
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343 | if (getSubscription(path) != null) { |
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344 | return; |
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345 | } |
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346 | |
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347 | final Pair<Path, Subscription<?>> temporary = new Pair<>(path, null); |
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348 | subscriptions.add(temporary); |
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349 | |
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350 | connection.subscribe(path.getTextual() + "_changed", this, new SubscriptionCallback<Instance>() { |
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351 | @Override |
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352 | public EventCallback subscribed(final Subscription<? super Instance> subscription) { |
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353 | if (subscription == null) { |
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354 | log.error("failed to subscribe for change event for " + path); |
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355 | return null; |
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356 | } |
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357 | log.debug("subscribed for change event for " + path); |
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358 | // subscription.setDispatcher(RemoteInstance.this); |
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359 | RemoteInstance.this.invokeLater(new RunAt<Instance>() { |
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360 | @Override |
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361 | public void run() { |
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362 | subscriptions.remove(temporary); |
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363 | subscriptions.add(new Pair<Path, Subscription<?>>(path, subscription)); |
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364 | } |
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365 | }); |
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366 | return new EventCallback() { |
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367 | @Override |
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368 | public void call(List<File> files) { |
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369 | assert isActive(); |
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370 | assert files.size() == 1; |
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371 | MultiParamLoader loader = new MultiParamLoader(); |
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372 | loader.setNewSource(files.get(0).getContent()); |
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373 | loader.addBreakCondition(MultiParamLoader.Status.AfterObject); |
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374 | ReflectionAccess access = new ReflectionAccess(ListChange.class, ListChange.getFramsClass()); |
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375 | loader.addAccessInterface(access); |
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376 | MultiParamLoader.Status status; |
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377 | try { |
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378 | while ((status = loader.go()) != MultiParamLoader.Status.Finished) { |
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379 | if (status == MultiParamLoader.Status.AfterObject) { |
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380 | AccessInterface accessInterface = loader.getLastAccessInterface(); |
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381 | reactToChange(path, (ListChange) accessInterface.getSelected()); |
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382 | } |
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383 | } |
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384 | } catch (Exception e) { |
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385 | e.printStackTrace(); |
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386 | } |
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387 | } |
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388 | }; |
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389 | } |
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390 | }); |
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391 | } |
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392 | |
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393 | |
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394 | protected void reactToChange(final Path path, final ListChange listChange) { |
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395 | assert isActive(); |
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396 | log.debug("reacting to change " + listChange + " in " + path); |
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397 | AccessInterface access = bindAccess(path); |
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398 | assert access != null; |
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399 | |
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400 | if ((listChange.getAction() == ListChange.Action.Modify) && (listChange.getPosition() == -1)) { |
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401 | final String p = path.getTextual(); |
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402 | resolveAndFetch(p, new Future<Path>() { |
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403 | @Override |
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404 | public void result(Path result, Exception e) { |
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405 | if (e != null) { |
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406 | log.error("failed to modify " + p + ": " + e); |
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407 | return; |
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408 | } |
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409 | fireListChange(path, listChange); |
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410 | } |
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411 | }); |
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412 | return; |
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413 | } |
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414 | |
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415 | |
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416 | CompositeParam childParam = Casting.tryCast(CompositeParam.class, access.getParam(listChange.getBestIdentifier())); |
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417 | assert childParam != null; |
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418 | switch (listChange.getAction()) { |
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419 | case Add: { |
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420 | final String p = path.getTextual() + "/" + childParam.getId(); |
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421 | resolveAndFetch(p, new Future<Path>() { |
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422 | @Override |
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423 | public void result(Path result, Exception e) { |
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424 | if (e != null) { |
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425 | log.error("failed to add " + p + ": " + e); |
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426 | return; |
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427 | } |
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428 | log.debug("added: " + result); |
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429 | fireListChange(path, listChange); |
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430 | } |
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431 | }); |
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432 | break; |
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433 | } |
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434 | case Remove: { |
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435 | access.set(childParam, null); |
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436 | fireListChange(path, listChange); |
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437 | break; |
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438 | } |
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439 | case Modify: { |
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440 | final String p = path.getTextual() + "/" + childParam.getId(); |
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441 | resolveAndFetch(p, new Future<Path>() { |
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442 | @Override |
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443 | public void result(Path result, Exception e) { |
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444 | if (e != null) { |
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445 | log.error("failed to modify " + p + ": " + e); |
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446 | return; |
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447 | } |
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448 | fireListChange(path, listChange); |
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449 | } |
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450 | }); |
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451 | break; |
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452 | } |
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453 | } |
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454 | } |
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455 | |
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456 | //TODO ValueParam |
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457 | @Override |
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458 | public void storeValue(final Path path, final Param param, final Object value, final StateFunctor stateFunctor) { |
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459 | assert isActive(); |
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460 | |
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461 | log.trace("storing value " + param + " for " + path); |
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462 | connection.send(new SetRequest().value(value.toString()).field(param.getId()).path(path.getTextual()), this, new StateCallback<Instance>() { |
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463 | @Override |
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464 | public void call(Exception e) { |
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465 | if (e == null) { |
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466 | bindAccess(path).set((ValueParam) param, value); |
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467 | } |
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468 | stateFunctor.call(e); |
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469 | } |
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470 | }); |
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471 | } |
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472 | } |
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