1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.IO;
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25 | using System.Threading;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Hive.Contracts;
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28 | using HeuristicLab.Hive.Contracts.BusinessObjects;
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29 | using HeuristicLab.Hive.Contracts.ResponseObjects;
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30 | using HeuristicLab.Hive.Slave.Common;
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31 | using HeuristicLab.Hive.Slave.Communication;
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32 | using HeuristicLab.Hive.Slave.Core.ClientConsoleService;
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33 | using HeuristicLab.Hive.Slave.Core.ConfigurationManager;
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34 | using HeuristicLab.Hive.Slave.Core.JobStorage;
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35 | using HeuristicLab.Hive.Slave.ExecutionEngine;
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36 | using HeuristicLab.Tracing;
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37 | using HeuristicLab.Hive.Slave.Communication.SlaveService;
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38 |
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39 | namespace HeuristicLab.Hive.Slave.Core {
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40 | /// <summary>
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41 | /// The core component of the Hive Client
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42 | /// </summary>
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43 | public class Core : MarshalByRefObject {
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44 | public static bool abortRequested { get; set; }
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45 |
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46 | private bool _currentlyFetching;
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47 | private bool CurrentlyFetching {
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48 | get {
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49 | return _currentlyFetching;
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50 | }
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51 | set {
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52 | _currentlyFetching = value;
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53 | Logger.Debug("Set CurrentlyFetching to " + _currentlyFetching);
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54 | }
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55 | }
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56 |
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57 | private Dictionary<Guid, Executor> engines = new Dictionary<Guid, Executor>();
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58 | private Dictionary<Guid, AppDomain> appDomains = new Dictionary<Guid, AppDomain>();
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59 | private Dictionary<Guid, JobDto> jobs = new Dictionary<Guid, JobDto>();
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60 |
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61 | private WcfService wcfService;
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62 | private HeartbeatManager beat;
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63 |
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64 | /// <summary>
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65 | /// Main Method for the client
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66 | /// </summary>
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67 | public void Start() {
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68 | abortRequested = false;
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69 | Logger.Info("Hive Slave started");
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70 | SlaveConsoleServer server = new SlaveConsoleServer();
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71 | server.StartClientConsoleServer(new Uri("net.tcp://127.0.0.1:8000/SlaveConsole/"));
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72 |
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73 | ConfigManager manager = ConfigManager.Instance;
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74 | manager.Core = this;
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75 |
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76 | //Register all Wcf Service references
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77 | wcfService = WcfService.Instance;
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78 | wcfService.GetJobCompleted += new EventHandler<GetJobCompletedEventArgs>(wcfService_GetJobCompleted);
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79 | wcfService.GetFinishedJobResultCompleted += new EventHandler<StoreFinishedJobResultCompletedEventArgs>(wcfService_StoreFinishedJobResultCompleted);
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80 | wcfService.ProcessSnapshotCompleted += new EventHandler<ProcessSnapshotCompletedEventArgs>(wcfService_ProcessSnapshotCompleted);
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81 | wcfService.ConnectionRestored += new EventHandler(wcfService_ConnectionRestored);
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82 | wcfService.ServerChanged += new EventHandler(wcfService_ServerChanged);
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83 | wcfService.Connected += new EventHandler(wcfService_Connected);
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84 |
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85 | //Recover Server IP and Port from the Settings Framework
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86 | ConnectionContainer cc = ConfigManager.Instance.GetServerIPAndPort();
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87 | if (cc.IPAdress != String.Empty && cc.Port != 0)
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88 | wcfService.SetIPAndPort(cc.IPAdress, cc.Port);
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89 |
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90 | //Initialize the heartbeat
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91 | beat = new HeartbeatManager { Interval = new TimeSpan(0, 0, 10) };
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92 | beat.StartHeartbeat();
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93 |
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94 | MessageQueue queue = MessageQueue.GetInstance();
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95 |
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96 | //Main processing loop
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97 | //Todo: own thread for message handling
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98 | //Rly?!
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99 | while (!abortRequested) {
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100 | MessageContainer container = queue.GetMessage();
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101 | DetermineAction(container);
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102 | }
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103 | Logger.Info("Program shutdown");
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104 | }
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105 |
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106 | /// <summary>
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107 | /// Reads and analyzes the Messages from the MessageQueue and starts corresponding actions
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108 | /// </summary>
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109 | /// <param name="container">The Container, containing the message</param>
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110 | private void DetermineAction(MessageContainer container) {
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111 | Logger.Info("Message: " + container.Message.ToString() + " for job: " + container.JobId);
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112 | switch (container.Message) {
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113 | //Server requests to abort a job
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114 | case MessageContainer.MessageType.AbortJob:
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115 | if (engines.ContainsKey(container.JobId))
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116 | engines[container.JobId].Abort();
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117 | else
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118 | Logger.Error("AbortJob: Engine doesn't exist");
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119 | break;
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120 |
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121 | //Job has been successfully aborted
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122 | case MessageContainer.MessageType.JobAborted:
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123 | Guid jobId = new Guid(container.JobId.ToString());
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124 | KillAppDomain(jobId);
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125 | break;
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126 |
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127 | //Request a Snapshot from the Execution Engine
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128 | case MessageContainer.MessageType.RequestSnapshot:
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129 | if (engines.ContainsKey(container.JobId))
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130 | engines[container.JobId].RequestSnapshot();
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131 | else
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132 | Logger.Error("RequestSnapshot: Engine with Job doesn't exist");
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133 | break;
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134 |
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135 | //Snapshot is ready and can be sent back to the Server
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136 | case MessageContainer.MessageType.SnapshotReady:
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137 | ThreadPool.QueueUserWorkItem(new WaitCallback(GetSnapshot), container.JobId);
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138 | break;
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139 |
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140 | //Pull a Job from the Server
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141 | case MessageContainer.MessageType.FetchJob:
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142 | if (!CurrentlyFetching) {
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143 | wcfService.GetJobAsync(ConfigManager.Instance.GetClientInfo().Id);
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144 | CurrentlyFetching = true;
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145 | } else
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146 | Logger.Info("Currently fetching, won't fetch this time!");
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147 | break;
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148 |
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149 |
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150 | //A Job has finished and can be sent back to the server
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151 | case MessageContainer.MessageType.FinishedJob:
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152 | ThreadPool.QueueUserWorkItem(new WaitCallback(GetFinishedJob), container.JobId);
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153 | break;
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154 |
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155 |
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156 | //When the timeslice is up
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157 | case MessageContainer.MessageType.UptimeLimitDisconnect:
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158 | Logger.Info("Uptime Limit reached, storing jobs and sending them back");
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159 |
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160 | ShutdownRunningJobsAndSubmitSnapshots();
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161 | break;
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162 |
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163 | //Fetch or Force Fetch Calendar!
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164 | case MessageContainer.MessageType.FetchOrForceFetchCalendar:
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165 | Logger.Info("Fetch Calendar from Server");
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166 | FetchCalendarFromServer();
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167 | break;
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168 |
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169 | //Hard shutdown of the client
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170 | case MessageContainer.MessageType.Shutdown:
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171 | Logger.Info("Shutdown Signal received");
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172 | lock (engines) {
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173 | Logger.Debug("engines locked");
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174 | foreach (KeyValuePair<Guid, AppDomain> kvp in appDomains) {
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175 | Logger.Debug("Shutting down Appdomain for " + kvp.Key);
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176 | appDomains[kvp.Key].UnhandledException -= new UnhandledExceptionEventHandler(appDomain_UnhandledException);
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177 | AppDomain.Unload(kvp.Value);
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178 | }
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179 | }
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180 | Logger.Debug("Stopping heartbeat");
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181 | abortRequested = true;
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182 | beat.StopHeartBeat();
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183 | Logger.Debug("Logging out");
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184 | WcfService.Instance.Logout(ConfigManager.Instance.GetClientInfo().Id);
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185 | break;
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186 | }
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187 | }
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188 |
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189 | private void ShutdownRunningJobsAndSubmitSnapshots() {
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190 | //check if there are running jobs
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191 | if (engines.Count > 0) {
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192 | //make sure there is no more fetching of jobs while the snapshots get processed
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193 | CurrentlyFetching = true;
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194 | //request a snapshot of each running job
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195 | foreach (KeyValuePair<Guid, Executor> kvp in engines) {
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196 | kvp.Value.RequestSnapshot();
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197 | }
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198 | }
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199 | }
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200 |
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201 | //Asynchronous Threads for interaction with the Execution Engine
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202 | #region Async Threads for the EE
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203 |
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204 | /// <summary>
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205 | /// serializes the finished job and submits it to the server. If, at the time, a network connection is unavailable, the Job gets stored on the disk.
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206 | /// once the connection gets reestablished, the job gets submitted
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207 | /// </summary>
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208 | /// <param name="jobId"></param>
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209 | private void GetFinishedJob(object jobId) {
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210 | Guid jId = (Guid)jobId;
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211 | Logger.Info("Getting the finished job with id: " + jId);
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212 | try {
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213 | if (!engines.ContainsKey(jId)) {
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214 | Logger.Info("Engine doesn't exist");
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215 | return;
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216 | }
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217 |
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218 | byte[] sJob = engines[jId].GetFinishedJob();
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219 |
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220 | if (WcfService.Instance.LoggedIn) {
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221 | Logger.Info("Sending the finished job with id: " + jId);
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222 | wcfService.GetFinishedJobResultAsync(ConfigManager.Instance.GetClientInfo().Id, jId, sJob, 1.0, engines[jId].CurrentException, true);
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223 | } else {
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224 | Logger.Info("Storing the finished job with id: " + jId + " to hdd");
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225 | JobStorageManager.PersistObjectToDisc(wcfService.ServerIP, wcfService.ServerPort, jId, sJob);
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226 | KillAppDomain(jId);
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227 | }
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228 | }
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229 | catch (InvalidStateException ise) {
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230 | Logger.Error("Invalid State while Snapshoting:", ise);
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231 | }
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232 | }
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233 |
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234 | private void GetSnapshot(object jobId) {
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235 | Logger.Info("Fetching a snapshot for job " + jobId);
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236 | Guid jId = (Guid)jobId;
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237 | byte[] obj = engines[jId].GetSnapshot();
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238 | Logger.Debug("BEGIN: Sending snapshot sync");
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239 | wcfService.ProcessSnapshotSync(ConfigManager.Instance.GetClientInfo().Id,
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240 | jId,
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241 | obj,
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242 | engines[jId].Progress,
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243 | null);
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244 | Logger.Debug("END: Sended snapshot sync");
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245 | //Uptime Limit reached, now is a good time to destroy this jobs.
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246 | Logger.Debug("Checking if uptime limit is reached");
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247 | if (!UptimeManager.Instance.IsAllowedToCalculate()) {
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248 | Logger.Debug("Uptime limit reached");
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249 | Logger.Debug("Killing Appdomain");
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250 | KillAppDomain(jId);
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251 | //Still anything running?
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252 | if (engines.Count == 0) {
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253 | Logger.Info("All jobs snapshotted and sent back, disconnecting");
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254 | WcfService.Instance.Disconnect();
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255 | } else {
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256 | Logger.Debug("There are still active Jobs in the Field, not disconnecting");
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257 | }
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258 |
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259 | } else {
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260 | Logger.Debug("Restarting the job" + jobId);
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261 | engines[jId].StartOnlyJob();
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262 | Logger.Info("Restarted the job" + jobId);
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263 | }
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264 | }
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265 |
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266 | #endregion
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267 |
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268 | //Eventhandlers for the communication with the wcf Layer
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269 | #region wcfService Events
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270 | /// <summary>
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271 | /// Login has returned
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272 | /// </summary>
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273 | /// <param name="sender"></param>
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274 | /// <param name="e"></param>
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275 | void wcfService_LoginCompleted(object sender, LoginCompletedEventArgs e) {
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276 | if (e.Result.StatusMessage == ResponseStatus.Ok) {
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277 | CurrentlyFetching = false;
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278 | Logger.Info("Login completed to Hive Server @ " + DateTime.Now);
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279 | } else
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280 | Logger.Error("Error during login: " + e.Result.StatusMessage.ToString());
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281 | }
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282 |
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283 | /// <summary>
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284 | /// A new Job from the wcfService has been received and will be started within a AppDomain.
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285 | /// </summary>
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286 | /// <param name="sender"></param>
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287 | /// <param name="e"></param>
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288 | void wcfService_GetJobCompleted(object sender, GetJobCompletedEventArgs e) {
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289 | if (e.Result.StatusMessage != ResponseStatus.GetJob_NoJobsAvailable) {
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290 | Logger.Info("Received new job with id " + e.Result.Obj.Id);
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291 | bool sandboxed = false;
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292 | Logger.Debug("Fetching plugins for job " + e.Result.Obj.Id);
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293 | try {
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294 |
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295 | PluginCache.Instance.PreparePlugins(e.Result.Obj.PluginsNeeded);
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296 | PluginCache.Instance.CopyPluginsForJob(e.Result.Obj.PluginsNeeded, e.Result.Obj.Id);
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297 |
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298 | // foreach (CachedHivePluginInfoDto plugininfo in PluginCache.Instance.GetPlugins(e.Result.Job.PluginsNeeded))
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299 | // files.AddRange(plugininfo.PluginFiles);
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300 | Logger.Debug("Plugins fetched for job " + e.Result.Obj.Id);
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301 | String pluginDir = Path.Combine(PluginCache.Instance.PluginRepositoryDir, e.Result.Obj.Id.ToString());
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302 |
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303 | AppDomain appDomain = HeuristicLab.PluginInfrastructure.Sandboxing.SandboxManager.CreateAndInitSandbox(pluginDir, null);
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304 | appDomain.UnhandledException += new UnhandledExceptionEventHandler(appDomain_UnhandledException);
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305 | lock (engines) {
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306 | if (!jobs.ContainsKey(e.Result.Obj.Id)) {
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307 | jobs.Add(e.Result.Obj.Id, e.Result.Obj);
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308 | appDomains.Add(e.Result.Obj.Id, appDomain);
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309 | Logger.Debug("Creating AppDomain");
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310 | Executor engine = (Executor)appDomain.CreateInstanceAndUnwrap(typeof(Executor).Assembly.GetName().Name, typeof(Executor).FullName);
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311 | Logger.Debug("Created AppDomain");
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312 | engine.JobId = e.Result.Obj.Id;
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313 | engine.Queue = MessageQueue.GetInstance();
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314 | Logger.Debug("Starting Engine for job " + e.Result.Obj.Id);
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315 | engine.Start(e.Data);
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316 | engines.Add(e.Result.Obj.Id, engine);
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317 |
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318 | SlaveStatusInfo.JobsFetched++;
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319 | Logger.Info("Increment FetchedJobs to:" + SlaveStatusInfo.JobsFetched);
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320 | }
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321 | }
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322 | beat.InterruptHeartBeatThread();
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323 | }
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324 | catch (Exception exception) {
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325 | Logger.Error("Creating the Appdomain and loading the job failed for job " + e.Result.Obj.Id);
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326 | Logger.Error("Error thrown is: ", exception);
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327 | CurrentlyFetching = false;
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328 | KillAppDomain(e.Result.Obj.Id);
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329 | wcfService.StoreFinishedJobResultsSync(ConfigManager.Instance.GetClientInfo().Id, e.Result.Obj.Id, new byte[] { }, 1, exception, true);
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330 | }
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331 | } else {
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332 | Logger.Info("No more jobs left!");
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333 | }
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334 | CurrentlyFetching = false;
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335 | }
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336 |
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337 | /// <summary>
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338 | /// A finished job has been stored on the server
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339 | /// </summary>
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340 | /// <param name="sender"></param>
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341 | /// <param name="e"></param>
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342 | void wcfService_StoreFinishedJobResultCompleted(object sender, StoreFinishedJobResultCompletedEventArgs e) {
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343 | Logger.Info("Job submitted with id " + e.Result.JobId);
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344 | KillAppDomain(e.Result.JobId);
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345 | if (e.Result.StatusMessage == ResponseStatus.Ok) {
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346 | SlaveStatusInfo.JobsProcessed++;
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347 | Logger.Info("Increased ProcessedJobs to:" + SlaveStatusInfo.JobsProcessed);
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348 | beat.InterruptHeartBeatThread();
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349 | } else {
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350 | Logger.Error("Sending of job " + e.Result.JobId + " failed, job has been wasted. Message: " + e.Result.StatusMessage);
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351 | }
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352 | }
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353 |
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354 | /// <summary>
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355 | /// A snapshot has been stored on the server
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356 | /// </summary>
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357 | /// <param name="sender"></param>
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358 | /// <param name="e"></param>
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359 | void wcfService_ProcessSnapshotCompleted(object sender, ProcessSnapshotCompletedEventArgs e) {
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360 | Logger.Info("Snapshot " + e.Result.JobId + " has been transmitted according to plan.");
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361 | }
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362 |
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363 | /// <summary>
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364 | /// The server has been changed. All Appdomains and Jobs must be aborted!
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365 | /// </summary>
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366 | /// <param name="sender"></param>
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367 | /// <param name="e"></param>
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368 | void wcfService_ServerChanged(object sender, EventArgs e) {
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369 | Logger.Info("ServerChanged has been called");
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370 | lock (engines) {
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371 | foreach (KeyValuePair<Guid, Executor> entries in engines) {
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372 | engines[entries.Key].Abort();
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373 | //appDomains[entries.Key].UnhandledException -= new UnhandledExceptionEventHandler(appDomain_UnhandledException);
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374 | //AppDomain.Unload(appDomains[entries.Key]);
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375 | }
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376 | //appDomains = new Dictionary<Guid, AppDomain>();
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377 | //engines = new Dictionary<Guid, Executor>();
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378 | //jobs = new Dictionary<Guid, Job>();
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379 | }
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380 | }
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381 |
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382 | /// <summary>
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383 | /// Connnection to the server has been estabilshed => Login and Send the persistet Jobs from the harddisk.
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384 | /// </summary>
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385 | /// <param name="sender"></param>
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386 | /// <param name="e"></param>
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387 | void wcfService_Connected(object sender, EventArgs e) {
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388 | Logger.Info("WCF Service got a connection");
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389 | if (!UptimeManager.Instance.CalendarAvailable) {
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390 | Logger.Info("No local calendar available, fetch it");
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391 | FetchCalendarFromServer();
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392 | }
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393 | //if the fetching from the server failed - still set the client online... maybe we get
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394 | //a result within the next few heartbeats
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395 | //if (!UptimeManager.Instance.CalendarAvailable || UptimeManager.Instance.IsOnline()) {
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396 | Logger.Info("CalendarAvailable is " + UptimeManager.Instance.CalendarAvailable + " and IsOnline is: " + UptimeManager.Instance.IsAllowedToCalculate());
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397 | Logger.Info("Setting client online");
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398 | wcfService.LoginSync(ConfigManager.Instance.GetClientInfo());
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399 | JobStorageManager.CheckAndSubmitJobsFromDisc();
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400 | CurrentlyFetching = false;
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401 | //}
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402 | }
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403 |
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404 | private void FetchCalendarFromServer() {
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405 | ResponseCalendar calres = wcfService.GetCalendarSync(ConfigManager.Instance.GetClientInfo().Id);
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406 | if (calres.StatusMessage == ResponseStatus.Ok) {
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407 | if (UptimeManager.Instance.SetAppointments(false, calres)) {
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408 | Logger.Info("Remote calendar installed");
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409 | wcfService.SetCalendarStatus(ConfigManager.Instance.GetClientInfo().Id, CalendarState.Fetched);
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410 | } else {
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411 | Logger.Info("Remote calendar installation failed, setting state to " + CalendarState.NotAllowedToFetch);
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412 | wcfService.SetCalendarStatus(ConfigManager.Instance.GetClientInfo().Id, CalendarState.NotAllowedToFetch);
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413 | }
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414 | } else {
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415 | Logger.Info("Remote calendar installation failed, setting state to " + CalendarState.NotAllowedToFetch);
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416 | wcfService.SetCalendarStatus(ConfigManager.Instance.GetClientInfo().Id, CalendarState.NotAllowedToFetch);
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417 | }
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418 | }
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419 |
|
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420 | //this is a little bit tricky -
|
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421 | void wcfService_ConnectionRestored(object sender, EventArgs e) {
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422 | Logger.Info("Reconnected to old server - checking currently running appdomains");
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423 |
|
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424 | foreach (KeyValuePair<Guid, Executor> execKVP in engines) {
|
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425 | if (execKVP.Value.ExecutionState != ExecutionState.Started && execKVP.Value.CurrentMessage == MessageContainer.MessageType.NoMessage) {
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426 | Logger.Info("Checking for JobId: " + execKVP.Value.JobId);
|
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427 | Thread finThread = new Thread(new ParameterizedThreadStart(GetFinishedJob));
|
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428 | finThread.Start(execKVP.Value.JobId);
|
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429 | }
|
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430 | }
|
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431 | }
|
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432 |
|
---|
433 | #endregion
|
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434 |
|
---|
435 | public Dictionary<Guid, Executor> GetExecutionEngines() {
|
---|
436 | return engines;
|
---|
437 | }
|
---|
438 |
|
---|
439 | void appDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) {
|
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440 | Logger.Error("Exception in AppDomain: " + e.ExceptionObject.ToString());
|
---|
441 | }
|
---|
442 |
|
---|
443 | internal Dictionary<Guid, JobDto> GetJobs() {
|
---|
444 | return jobs;
|
---|
445 | }
|
---|
446 |
|
---|
447 | /// <summary>
|
---|
448 | /// Kill a appdomain with a specific id.
|
---|
449 | /// </summary>
|
---|
450 | /// <param name="id">the GUID of the job</param>
|
---|
451 | private void KillAppDomain(Guid id) {
|
---|
452 | Logger.Debug("Shutting down Appdomain for Job " + id);
|
---|
453 | lock (engines) {
|
---|
454 | try {
|
---|
455 | if (engines.ContainsKey(id))
|
---|
456 | engines[id].Dispose();
|
---|
457 | if (appDomains.ContainsKey(id)) {
|
---|
458 | appDomains[id].UnhandledException -= new UnhandledExceptionEventHandler(appDomain_UnhandledException);
|
---|
459 | AppDomain.Unload(appDomains[id]);
|
---|
460 | appDomains.Remove(id);
|
---|
461 | }
|
---|
462 | engines.Remove(id);
|
---|
463 | jobs.Remove(id);
|
---|
464 | PluginCache.Instance.DeletePluginsForJob(id);
|
---|
465 | GC.Collect();
|
---|
466 | }
|
---|
467 | catch (Exception ex) {
|
---|
468 | Logger.Error("Exception when unloading the appdomain: ", ex);
|
---|
469 | }
|
---|
470 | }
|
---|
471 | GC.Collect();
|
---|
472 | }
|
---|
473 | }
|
---|
474 |
|
---|
475 |
|
---|
476 | }
|
---|