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.Linq;
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25 | using System.Text;
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26 | using HeuristicLab.Hive.Contracts.BusinessObjects;
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27 | using HeuristicLab.Hive.Contracts.Interfaces;
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28 | using HeuristicLab.Hive.Contracts;
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29 | using HeuristicLab.Core;
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30 | using HeuristicLab.Hive.Server.DataAccess;
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31 | using System.Resources;
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32 | using System.Reflection;
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33 | using HeuristicLab.Hive.JobBase;
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34 | using HeuristicLab.Hive.Server.Core.InternalInterfaces;
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35 | using System.Threading;
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36 | using HeuristicLab.PluginInfrastructure;
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37 | using HeuristicLab.DataAccess.Interfaces;
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38 |
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39 | namespace HeuristicLab.Hive.Server.Core {
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40 | /// <summary>
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41 | /// The ClientCommunicator manages the whole communication with the client
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42 | /// </summary>
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43 | public class ClientCommunicator: IClientCommunicator {
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44 | private static Dictionary<Guid, DateTime> lastHeartbeats =
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45 | new Dictionary<Guid,DateTime>();
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46 |
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47 | private static ReaderWriterLockSlim heartbeatLock =
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48 | new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
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49 |
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50 | private ISessionFactory factory;
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51 | private ILifecycleManager lifecycleManager;
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52 | private IInternalJobManager jobManager;
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53 | private IScheduler scheduler;
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54 |
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55 | /// <summary>
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56 | /// Initialization of the Adapters to the database
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57 | /// Initialization of Eventhandler for the lifecycle management
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58 | /// Initialization of lastHearbeats Dictionary
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59 | /// </summary>
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60 | public ClientCommunicator() {
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61 | factory = ServiceLocator.GetSessionFactory();
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62 |
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63 | lifecycleManager = ServiceLocator.GetLifecycleManager();
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64 | jobManager = ServiceLocator.GetJobManager() as
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65 | IInternalJobManager;
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66 | scheduler = ServiceLocator.GetScheduler();
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67 |
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68 | lifecycleManager.RegisterHeartbeat(
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69 | new EventHandler(lifecycleManager_OnServerHeartbeat));
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70 | }
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71 |
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72 | /// <summary>
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73 | /// Check if online clients send their hearbeats
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74 | /// if not -> set them offline and check if they where calculating a job
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75 | /// </summary>
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76 | /// <param name="sender"></param>
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77 | /// <param name="e"></param>
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78 | void lifecycleManager_OnServerHeartbeat(object sender, EventArgs e) {
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79 | ISession session = factory.GetSessionForCurrentThread();
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80 | ITransaction tx = null;
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81 |
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82 | try {
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83 | IClientAdapter clientAdapter =
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84 | session.GetDataAdapter<ClientInfo, IClientAdapter>();
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85 | IJobAdapter jobAdapter =
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86 | session.GetDataAdapter<Job, IJobAdapter>();
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87 |
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88 | tx = session.BeginTransaction();
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89 |
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90 | List<ClientInfo> allClients = new List<ClientInfo>(clientAdapter.GetAll());
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91 |
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92 | foreach (ClientInfo client in allClients) {
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93 | if (client.State != State.offline && client.State != State.nullState) {
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94 | heartbeatLock.EnterUpgradeableReadLock();
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95 |
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96 | if (!lastHeartbeats.ContainsKey(client.Id)) {
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97 | client.State = State.offline;
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98 | clientAdapter.Update(client);
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99 | foreach (Job job in jobAdapter.GetActiveJobsOf(client)) {
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100 | jobManager.ResetJobsDependingOnResults(job);
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101 | }
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102 | } else {
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103 | DateTime lastHbOfClient = lastHeartbeats[client.Id];
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104 |
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105 | TimeSpan dif = DateTime.Now.Subtract(lastHbOfClient);
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106 | // check if time between last hearbeat and now is greather than HEARTBEAT_MAX_DIF
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107 | if (dif.TotalSeconds > ApplicationConstants.HEARTBEAT_MAX_DIF) {
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108 | // if client calculated jobs, the job must be reset
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109 | foreach (Job job in jobAdapter.GetActiveJobsOf(client)) {
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110 | jobManager.ResetJobsDependingOnResults(job);
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111 | }
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112 |
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113 | // client must be set offline
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114 | client.State = State.offline;
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115 | clientAdapter.Update(client);
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116 |
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117 | heartbeatLock.EnterWriteLock();
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118 | lastHeartbeats.Remove(client.Id);
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119 | heartbeatLock.ExitWriteLock();
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120 | }
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121 | }
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122 |
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123 | heartbeatLock.ExitUpgradeableReadLock();
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124 | } else {
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125 | heartbeatLock.EnterWriteLock();
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126 | if (lastHeartbeats.ContainsKey(client.Id))
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127 | lastHeartbeats.Remove(client.Id);
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128 | heartbeatLock.ExitWriteLock();
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129 | }
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130 | }
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131 | tx.Commit();
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132 | }
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133 | catch (Exception ex) {
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134 | if (tx != null)
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135 | tx.Rollback();
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136 | throw ex;
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137 | }
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138 | finally {
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139 | if (session != null)
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140 | session.EndSession();
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141 | }
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142 | }
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143 |
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144 | #region IClientCommunicator Members
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145 |
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146 | /// <summary>
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147 | /// Login process for the client
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148 | /// A hearbeat entry is created as well (login is the first hearbeat)
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149 | /// </summary>
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150 | /// <param name="clientInfo"></param>
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151 | /// <returns></returns>
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152 | public Response Login(ClientInfo clientInfo) {
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153 | ISession session = factory.GetSessionForCurrentThread();
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154 | ITransaction tx = null;
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155 |
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156 | try {
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157 | IClientAdapter clientAdapter =
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158 | session.GetDataAdapter<ClientInfo, IClientAdapter>();
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159 |
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160 | tx = session.BeginTransaction();
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161 |
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162 | Response response = new Response();
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163 |
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164 | heartbeatLock.EnterWriteLock();
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165 | if (lastHeartbeats.ContainsKey(clientInfo.Id)) {
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166 | lastHeartbeats[clientInfo.Id] = DateTime.Now;
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167 | } else {
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168 | lastHeartbeats.Add(clientInfo.Id, DateTime.Now);
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169 | }
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170 | heartbeatLock.ExitWriteLock();
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171 |
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172 | ClientInfo client = clientAdapter.GetById(clientInfo.Id);
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173 | if (client != null && client.State != State.offline && client.State != State.nullState) {
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174 | response.Success = false;
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175 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_LOGIN_USER_ALLREADY_ONLINE;
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176 | return response;
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177 | }
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178 | clientInfo.State = State.idle;
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179 | clientAdapter.Update(clientInfo);
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180 | response.Success = true;
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181 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_LOGIN_SUCCESS;
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182 |
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183 | tx.Commit();
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184 | return response;
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185 | }
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186 | catch (Exception ex) {
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187 | if (tx != null)
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188 | tx.Rollback();
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189 | throw ex;
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190 | }
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191 | finally {
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192 | if (session != null)
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193 | session.EndSession();
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194 | }
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195 | }
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196 |
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197 | /// <summary>
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198 | /// The client has to send regulary heartbeats
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199 | /// this hearbeats will be stored in the heartbeats dictionary
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200 | /// check if there is work for the client and send the client a response if he should pull a job
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201 | /// </summary>
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202 | /// <param name="hbData"></param>
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203 | /// <returns></returns>
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204 | public ResponseHB ProcessHeartBeat(HeartBeatData hbData) {
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205 | ISession session = factory.GetSessionForCurrentThread();
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206 | ITransaction tx = null;
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207 |
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208 | try {
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209 | IClientAdapter clientAdapter =
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210 | session.GetDataAdapter<ClientInfo, IClientAdapter>();
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211 |
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212 | IJobAdapter jobAdapter =
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213 | session.GetDataAdapter<Job, IJobAdapter>();
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214 |
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215 | tx = session.BeginTransaction();
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216 |
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217 | ResponseHB response = new ResponseHB();
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218 | response.ActionRequest = new List<MessageContainer>();
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219 |
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220 | ClientInfo client = clientAdapter.GetById(hbData.ClientId);
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221 |
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222 | // check if the client is logged in
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223 | if (client.State == State.offline || client.State == State.nullState) {
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224 | response.Success = false;
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225 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_USER_NOT_LOGGED_IN;
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226 | response.ActionRequest.Add(new MessageContainer(MessageContainer.MessageType.NoMessage));
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227 | return response;
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228 | }
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229 |
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230 | client.NrOfFreeCores = hbData.FreeCores;
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231 | client.FreeMemory = hbData.FreeMemory;
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232 |
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233 | // save timestamp of this heartbeat
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234 | heartbeatLock.EnterWriteLock();
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235 | if (lastHeartbeats.ContainsKey(hbData.ClientId)) {
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236 | lastHeartbeats[hbData.ClientId] = DateTime.Now;
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237 | } else {
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238 | lastHeartbeats.Add(hbData.ClientId, DateTime.Now);
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239 | }
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240 | heartbeatLock.ExitWriteLock();
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241 |
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242 | response.Success = true;
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243 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_HEARTBEAT_RECEIVED;
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244 | // check if client has a free core for a new job
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245 | // if true, ask scheduler for a new job for this client
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246 | if (hbData.FreeCores > 0 && scheduler.ExistsJobForClient(hbData))
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247 | response.ActionRequest.Add(new MessageContainer(MessageContainer.MessageType.FetchJob));
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248 | else
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249 | response.ActionRequest.Add(new MessageContainer(MessageContainer.MessageType.NoMessage));
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250 |
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251 | processJobProcess(hbData, jobAdapter, clientAdapter, response);
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252 | clientAdapter.Update(client);
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253 |
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254 | tx.Commit();
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255 | return response;
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256 | }
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257 | catch (Exception ex) {
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258 | if (tx != null)
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259 | tx.Rollback();
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260 | throw ex;
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261 | }
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262 | finally {
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263 | if (session != null)
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264 | session.EndSession();
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265 | }
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266 | }
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267 |
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268 | /// <summary>
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269 | /// Process the Job progress sent by a client
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270 | /// </summary>
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271 | /// <param name="hbData"></param>
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272 | /// <param name="jobAdapter"></param>
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273 | /// <param name="clientAdapter"></param>
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274 | /// <param name="response"></param>
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275 | private void processJobProcess(HeartBeatData hbData, IJobAdapter jobAdapter, IClientAdapter clientAdapter, ResponseHB response) {
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276 | if (hbData.JobProgress != null) {
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277 | List<Job> jobsOfClient = new List<Job>(jobAdapter.GetActiveJobsOf(clientAdapter.GetById(hbData.ClientId)));
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278 | if (jobsOfClient == null || jobsOfClient.Count == 0) {
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279 | response.Success = false;
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280 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_IS_NOT_BEEING_CALCULATED;
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281 | return;
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282 | }
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283 |
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284 | foreach (KeyValuePair<Guid, double> jobProgress in hbData.JobProgress) {
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285 | Job curJob = jobAdapter.GetById(jobProgress.Key);
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286 | if (curJob.Client == null || curJob.Client.Id != hbData.ClientId) {
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287 | response.Success = false;
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288 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_IS_NOT_BEEING_CALCULATED;
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289 | } else if (curJob.State == State.finished) {
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290 | // another client has finished this job allready
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291 | // the client can abort it
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292 | response.ActionRequest.Add(new MessageContainer(MessageContainer.MessageType.AbortJob, curJob.Id));
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293 | } else {
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294 | // save job progress
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295 | curJob.Percentage = jobProgress.Value;
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296 | jobAdapter.Update(curJob);
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297 | }
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298 | }
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299 | }
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300 | }
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301 |
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302 | /// <summary>
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303 | /// if the client asked to pull a job he calls this method
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304 | /// the server selects a job and sends it to the client
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305 | /// </summary>
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306 | /// <param name="clientId"></param>
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307 | /// <returns></returns>
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308 | public ResponseJob SendJob(Guid clientId) {
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309 | ResponseJob response = new ResponseJob();
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310 |
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311 | Job job2Calculate = scheduler.GetNextJobForClient(clientId);
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312 | if (job2Calculate != null) {
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313 | response.Job = job2Calculate;
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314 | response.Success = true;
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315 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_PULLED;
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316 | } else {
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317 | response.Success = false;
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318 | response.Job = null;
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319 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_NO_JOBS_LEFT;
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320 | }
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321 | return response;
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322 | }
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323 |
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324 | private ResponseResultReceived ProcessJobResult(Guid clientId,
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325 | Guid jobId,
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326 | byte[] result,
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327 | double percentage,
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328 | Exception exception,
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329 | bool finished) {
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330 | ISession session = factory.GetSessionForCurrentThread();
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331 | ITransaction tx = null;
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332 |
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333 | try {
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334 | IClientAdapter clientAdapter =
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335 | session.GetDataAdapter<ClientInfo, IClientAdapter>();
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336 | IJobAdapter jobAdapter =
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337 | session.GetDataAdapter<Job, IJobAdapter>();
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338 | IJobResultsAdapter jobResultAdapter =
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339 | session.GetDataAdapter<JobResult, IJobResultsAdapter>();
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340 |
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341 | tx = session.BeginTransaction();
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342 |
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343 | ResponseResultReceived response = new ResponseResultReceived();
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344 | ClientInfo client =
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345 | clientAdapter.GetById(clientId);
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346 |
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347 | Job job =
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348 | jobAdapter.GetById(jobId);
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349 |
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350 | if (job.Client == null) {
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351 | response.Success = false;
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352 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_IS_NOT_BEEING_CALCULATED;
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353 | return response;
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354 | }
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355 | if (job.Client.Id != clientId) {
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356 | response.Success = false;
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357 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_WRONG_CLIENT_FOR_JOB;
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358 | return response;
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359 | }
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360 | if (job == null) {
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361 | response.Success = false;
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362 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_NO_JOB_WITH_THIS_ID;
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363 | return response;
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364 | }
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365 | if (job.State == State.finished) {
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366 | response.Success = true;
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367 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOBRESULT_RECEIVED;
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368 | return response;
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369 | }
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370 | if (job.State != State.calculating) {
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371 | response.Success = false;
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372 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_WRONG_JOB_STATE;
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373 | return response;
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374 | }
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375 | job.SerializedJob = result;
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376 | job.Percentage = percentage;
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377 |
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378 | if (finished) {
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379 | job.State = State.finished;
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380 | jobAdapter.Update(job);
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381 |
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382 | client.State = State.idle;
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383 | clientAdapter.Update(client);
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384 |
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385 | List<JobResult> jobResults = new List<JobResult>(jobResultAdapter.GetResultsOf(job));
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386 | foreach (JobResult currentResult in jobResults)
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387 | jobResultAdapter.Delete(currentResult);
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388 | }
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389 |
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390 | JobResult jobResult =
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391 | new JobResult();
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392 | jobResult.Client = client;
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393 | jobResult.Job = job;
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394 | jobResult.Result = result;
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395 | jobResult.Percentage = percentage;
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396 | jobResult.Exception = exception;
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397 | jobResult.DateFinished = DateTime.Now;
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398 |
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399 | jobResultAdapter.Update(jobResult);
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400 | jobAdapter.Update(job);
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401 |
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402 | response.Success = true;
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403 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOBRESULT_RECEIVED;
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404 | response.JobId = jobId;
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405 | response.finished = finished;
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406 |
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407 | tx.Commit();
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408 | return response;
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409 | }
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410 | catch (Exception ex) {
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411 | if (tx != null)
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412 | tx.Rollback();
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413 | throw ex;
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414 | }
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415 | finally {
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416 | if (session != null)
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417 | session.EndSession();
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418 | }
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419 | }
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420 |
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421 |
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422 | /// <summary>
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423 | /// the client can send job results during calculating
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424 | /// and will send a final job result when he finished calculating
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425 | /// these job results will be stored in the database
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426 | /// </summary>
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427 | /// <param name="clientId"></param>
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428 | /// <param name="jobId"></param>
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429 | /// <param name="result"></param>
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430 | /// <param name="exception"></param>
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431 | /// <param name="finished"></param>
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432 | /// <returns></returns>
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433 | public ResponseResultReceived StoreFinishedJobResult(Guid clientId,
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434 | Guid jobId,
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435 | byte[] result,
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436 | double percentage,
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437 | Exception exception) {
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438 |
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439 | return ProcessJobResult(clientId, jobId, result, percentage, exception, true);
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440 | }
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441 |
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442 |
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443 | public ResponseResultReceived ProcessSnapshot(Guid clientId, Guid jobId, byte[] result, double percentage, Exception exception) {
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444 | return ProcessJobResult(clientId, jobId, result, percentage, exception, false);
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445 | }
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446 |
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447 | /// <summary>
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448 | /// when a client logs out the state will be set
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449 | /// and the entry in the last hearbeats dictionary will be removed
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450 | /// </summary>
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451 | /// <param name="clientId"></param>
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452 | /// <returns></returns>
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453 | public Response Logout(Guid clientId) {
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454 | ISession session = factory.GetSessionForCurrentThread();
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455 | ITransaction tx = null;
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456 |
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457 | try {
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458 | IClientAdapter clientAdapter =
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459 | session.GetDataAdapter<ClientInfo, IClientAdapter>();
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460 | IJobAdapter jobAdapter =
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461 | session.GetDataAdapter<Job, IJobAdapter>();
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462 |
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463 | tx = session.BeginTransaction();
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464 |
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465 | Response response = new Response();
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466 |
|
---|
467 | heartbeatLock.EnterWriteLock();
|
---|
468 | if (lastHeartbeats.ContainsKey(clientId))
|
---|
469 | lastHeartbeats.Remove(clientId);
|
---|
470 | heartbeatLock.ExitWriteLock();
|
---|
471 |
|
---|
472 | ClientInfo client = clientAdapter.GetById(clientId);
|
---|
473 | if (client == null) {
|
---|
474 | response.Success = false;
|
---|
475 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_LOGOUT_CLIENT_NOT_REGISTERED;
|
---|
476 | return response;
|
---|
477 | }
|
---|
478 | List<Job> allJobs = new List<Job>(jobAdapter.GetAll());
|
---|
479 | if (client.State == State.calculating) {
|
---|
480 | // check wich job the client was calculating and reset it
|
---|
481 | foreach (Job job in allJobs) {
|
---|
482 | if (job.Client.Id == client.Id) {
|
---|
483 | jobManager.ResetJobsDependingOnResults(job);
|
---|
484 | }
|
---|
485 | }
|
---|
486 | }
|
---|
487 |
|
---|
488 | client.State = State.offline;
|
---|
489 | clientAdapter.Update(client);
|
---|
490 |
|
---|
491 | response.Success = true;
|
---|
492 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_LOGOUT_SUCCESS;
|
---|
493 |
|
---|
494 | tx.Commit();
|
---|
495 | return response;
|
---|
496 | }
|
---|
497 | catch (Exception ex) {
|
---|
498 | if (tx != null)
|
---|
499 | tx.Rollback();
|
---|
500 | throw ex;
|
---|
501 | }
|
---|
502 | finally {
|
---|
503 | if (session != null)
|
---|
504 | session.EndSession();
|
---|
505 | }
|
---|
506 | }
|
---|
507 |
|
---|
508 | /// <summary>
|
---|
509 | /// If a client goes offline and restores a job he was calculating
|
---|
510 | /// he can ask the client if he still needs the job result
|
---|
511 | /// </summary>
|
---|
512 | /// <param name="jobId"></param>
|
---|
513 | /// <returns></returns>
|
---|
514 | public Response IsJobStillNeeded(Guid jobId) {
|
---|
515 | ISession session = factory.GetSessionForCurrentThread();
|
---|
516 | ITransaction tx = null;
|
---|
517 |
|
---|
518 | try {
|
---|
519 | IJobAdapter jobAdapter =
|
---|
520 | session.GetDataAdapter<Job, IJobAdapter>();
|
---|
521 | tx = session.BeginTransaction();
|
---|
522 |
|
---|
523 | Response response = new Response();
|
---|
524 | Job job = jobAdapter.GetById(jobId);
|
---|
525 | if (job == null) {
|
---|
526 | response.Success = false;
|
---|
527 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_DOESNT_EXIST;
|
---|
528 | return response;
|
---|
529 | }
|
---|
530 | if (job.State == State.finished) {
|
---|
531 | response.Success = true;
|
---|
532 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_JOB_ALLREADY_FINISHED;
|
---|
533 | return response;
|
---|
534 | }
|
---|
535 | job.State = State.finished;
|
---|
536 | jobAdapter.Update(job);
|
---|
537 |
|
---|
538 | response.Success = true;
|
---|
539 | response.StatusMessage = ApplicationConstants.RESPONSE_COMMUNICATOR_SEND_JOBRESULT;
|
---|
540 | tx.Commit();
|
---|
541 | return response;
|
---|
542 | }
|
---|
543 | catch (Exception ex) {
|
---|
544 | if (tx != null)
|
---|
545 | tx.Rollback();
|
---|
546 | throw ex;
|
---|
547 | }
|
---|
548 | finally {
|
---|
549 | if (session != null)
|
---|
550 | session.EndSession();
|
---|
551 | }
|
---|
552 | }
|
---|
553 |
|
---|
554 | public ResponsePlugin SendPlugins(List<PluginInfo> pluginList) {
|
---|
555 |
|
---|
556 |
|
---|
557 | throw new NotImplementedException();
|
---|
558 | }
|
---|
559 |
|
---|
560 | #endregion
|
---|
561 | }
|
---|
562 | }
|
---|