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 System.Timers;
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27 | using HeuristicLab.Hive.Slave.Common;
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28 | using HeuristicLab.Hive.Slave.Communication;
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29 | using System.Diagnostics;
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30 | using HeuristicLab.Hive.Contracts.BusinessObjects;
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31 | using HeuristicLab.Hive.Contracts;
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32 | using HeuristicLab.Hive.Slave.Core.ConfigurationManager;
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33 | using HeuristicLab.Tracing;
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34 | using System.Threading;
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35 | using HeuristicLab.Hive.Slave.Communication.SlaveService;
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36 |
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37 | namespace HeuristicLab.Hive.Slave.Core {
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38 | /// <summary>
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39 | /// Heartbeat class. It sends every x ms a heartbeat to the server and receives a Message
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40 | /// </summary>
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41 | public class HeartbeatManager {
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42 |
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43 | private bool offline;
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44 |
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45 | public TimeSpan Interval { get; set; }
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46 |
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47 | private Thread heartBeatThread;
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48 |
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49 | private static object locker = new object();
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50 |
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51 | public HeartbeatManager() {
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52 | Interval = new TimeSpan(0,0,10);
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53 | }
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54 |
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55 | public HeartbeatManager(TimeSpan interval) {
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56 | Interval = interval;
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57 | }
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58 |
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59 | private WcfService wcfService;
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60 |
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61 | private bool abortThreadPending;
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62 |
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63 | ReaderWriterLockSlim heartBeatThreadIsSleepingLock = new ReaderWriterLockSlim();
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64 | private bool heartBeatThreadIsSleeping = false;
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65 |
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66 | /// <summary>
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67 | /// Starts the Heartbeat signal.
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68 | /// </summary>
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69 | public void StartHeartbeat() {
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70 | wcfService = WcfService.Instance;
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71 | wcfService.ProcessHeartBeatCompleted += new EventHandler<ProcessHeartBeatCompletedEventArgs>(wcfService_ProcessHeartBeatCompleted);
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72 | abortThreadPending = false;
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73 | heartBeatThread = GetHeartBeatThread();
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74 | heartBeatThread.Start();
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75 | }
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76 |
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77 | private Thread GetHeartBeatThread() {
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78 | return new Thread(() => {
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79 | while (!abortThreadPending) {
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80 | try {
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81 | lock (locker) {
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82 | if (wcfService.ConnState != NetworkEnum.WcfConnState.Connected) {
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83 | wcfService.Connect(); // Login happens automatically upon successufl connection
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84 | }
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85 | if (!wcfService.LoggedIn) {
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86 | wcfService.LoginSync(ConfigManager.Instance.GetClientInfo()); // if login faild previously try again
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87 | }
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88 |
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89 | if (wcfService.LoggedIn) {
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90 | SlaveDto info = ConfigManager.Instance.GetClientInfo();
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91 |
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92 | HeartBeatData heartBeatData = new HeartBeatData {
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93 | SlaveId = info.Id,
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94 | FreeCores = info.NrOfCores - ConfigManager.Instance.GetUsedCores(),
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95 | FreeMemory = GetFreeMemory(),
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96 | JobProgress = ConfigManager.Instance.GetProgressOfAllJobs(),
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97 | IsAllowedToCalculate = UptimeManager.Instance.IsAllowedToCalculate() && UptimeManager.Instance.CalendarAvailable
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98 | };
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99 |
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100 | if (!heartBeatData.IsAllowedToCalculate) {
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101 | // stop all running jobs and send snapshots to server
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102 | MessageQueue.GetInstance().AddMessage(MessageContainer.MessageType.UptimeLimitDisconnect);
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103 | }
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104 |
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105 | Logger.Debug("Sending Heartbeat: " + heartBeatData);
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106 | wcfService.ProcessHeartBeatAsync(heartBeatData);
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107 | }
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108 |
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109 | } // lock
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110 | try {
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111 | heartBeatThreadIsSleepingLock.EnterWriteLock();
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112 | heartBeatThreadIsSleeping = true;
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113 | heartBeatThreadIsSleepingLock.ExitWriteLock();
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114 |
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115 | Thread.Sleep(Interval);
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116 |
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117 | heartBeatThreadIsSleepingLock.EnterWriteLock();
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118 | heartBeatThreadIsSleeping = false;
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119 | heartBeatThreadIsSleepingLock.ExitWriteLock();
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120 | }
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121 | catch (ThreadInterruptedException e) {
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122 | Logger.Debug("Heartbeat sleep interrupted");
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123 | }
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124 | }
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125 | catch (Exception e) {
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126 | Logger.Error("Heartbeat Thread failed badly: " + e.Message);
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127 | }
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128 | } // while
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129 | abortThreadPending = false;
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130 | Logger.Debug("Heartbeat thread stopped");
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131 | });
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132 | }
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133 |
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134 | private int GetFreeMemory() {
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135 | PerformanceCounter counter = new PerformanceCounter("Memory", "Available Bytes", true);
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136 | int mb = (int)(counter.NextValue() / 1024 / 1024);
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137 | return mb;
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138 | }
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139 |
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140 | void wcfService_ProcessHeartBeatCompleted(object sender, ProcessHeartBeatCompletedEventArgs e) {
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141 | Logger.Debug("Heartbeat Response received");
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142 | e.Result.ActionRequest.ForEach(mc => MessageQueue.GetInstance().AddMessage(mc));
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143 | }
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144 |
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145 | public void StopHeartBeat() {
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146 | abortThreadPending = true;
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147 | heartBeatThread.Interrupt();
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148 | heartBeatThread.Join();
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149 | }
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150 |
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151 | /// <summary>
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152 | /// use this method to singalize there is work to do (to avoid the waiting period if its clear that actions are required)
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153 | /// </summary>
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154 | public void InterruptHeartBeatThread() {
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155 | // deal with ReadWriteLock to avoid interrupting the thread while it is in SleepOrWait due to another reason (like waiting for a resource in a lock-statement)
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156 | heartBeatThreadIsSleepingLock.EnterReadLock();
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157 | Debug.WriteLine("InterruptHeartBeatThread");
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158 | if (heartBeatThreadIsSleeping) {
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159 | Debug.WriteLine("will interrupt heartbeatthread");
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160 | heartBeatThread.Interrupt();
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161 | } else {
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162 | Debug.WriteLine("will not interrupt heartbeatthread");
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163 | }
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164 | heartBeatThreadIsSleepingLock.ExitReadLock();
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165 | }
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166 | }
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167 | }
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