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.ComponentModel;
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25 | using System.Data;
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26 | using System.Drawing;
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27 | using System.Linq;
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28 | using System.Text;
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29 | using System.Windows.Forms;
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30 | using System.ServiceModel;
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31 | using HeuristicLab.Core;
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32 | using System.Xml;
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33 | using System.Threading;
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34 | using System.IO;
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35 | using System.IO.Compression;
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36 | using System.Net;
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37 |
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38 | namespace HeuristicLab.Grid {
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39 | [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple, UseSynchronizationContext = false)]
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40 | public partial class ClientForm : Form {
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41 | private ChannelFactory<IEngineStore> factory;
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42 | private System.Timers.Timer fetchOperationTimer;
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43 | private IEngineStore engineStore;
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44 | private Guid currentGuid;
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45 | private ProcessingEngine currentEngine;
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46 | private object connectionLock = new object();
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47 |
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48 | public ClientForm() {
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49 | InitializeComponent();
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50 | fetchOperationTimer = new System.Timers.Timer();
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51 | fetchOperationTimer.Interval = 200;
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52 | fetchOperationTimer.Elapsed += new System.Timers.ElapsedEventHandler(fetchOperationTimer_Elapsed);
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53 | statusTextBox.Text = "Stopped";
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54 | currentGuid = Guid.Empty;
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55 | }
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56 |
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57 | private void startButton_Click(object sender, EventArgs e) {
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58 | try {
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59 | ResetConnection();
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60 | fetchOperationTimer.Start();
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61 | startButton.Enabled = false;
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62 | stopButton.Enabled = true;
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63 | statusTextBox.Text = "Waiting for engine";
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64 |
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65 | } catch(CommunicationException ex) {
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66 | MessageBox.Show("Exception while connecting to the server: " + ex.Message);
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67 | startButton.Enabled = true;
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68 | stopButton.Enabled = false;
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69 | fetchOperationTimer.Stop();
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70 | }
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71 | }
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72 |
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73 | private void ResetConnection() {
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74 | NetTcpBinding binding = new NetTcpBinding();
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75 | binding.MaxReceivedMessageSize = 100000000; // 100Mbytes
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76 | binding.ReaderQuotas.MaxStringContentLength = 100000000; // also 100M chars
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77 | binding.ReaderQuotas.MaxArrayLength = 100000000; // also 100M elements;
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78 | binding.Security.Mode = SecurityMode.None;
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79 | factory = new ChannelFactory<IEngineStore>(binding);
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80 | engineStore = factory.CreateChannel(new EndpointAddress(addressTextBox.Text));
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81 | }
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82 |
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83 | private void stopButton_Click(object sender, EventArgs e) {
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84 | fetchOperationTimer.Stop();
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85 | if(currentEngine != null)
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86 | currentEngine.Abort();
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87 | lock(connectionLock) {
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88 | IAsyncResult closeResult = factory.BeginClose(null, null);
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89 | factory.EndClose(closeResult);
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90 | }
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91 | statusTextBox.Text = "Stopped";
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92 | stopButton.Enabled = false;
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93 | startButton.Enabled = true;
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94 | }
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95 |
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96 | private void fetchOperationTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {
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97 | byte[] engineXml;
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98 | fetchOperationTimer.Stop();
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99 | try {
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100 | bool success;
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101 | lock(connectionLock) {
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102 | if(factory.State != CommunicationState.Opened) {
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103 | ResetConnection();
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104 | }
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105 | success = engineStore.TryTakeEngine(out currentGuid, out engineXml);
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106 | }
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107 | if(success) {
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108 | currentEngine = RestoreEngine(engineXml);
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109 | if(InvokeRequired) { Invoke((MethodInvoker)delegate() { statusTextBox.Text = "Executing engine"; }); } else statusTextBox.Text = "Executing engine";
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110 | currentEngine.Finished += delegate(object src, EventArgs args) {
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111 | if(factory.State == CommunicationState.Opened && !currentEngine.Canceled) {
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112 | byte[] resultXml = SaveEngine(currentEngine);
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113 | lock(connectionLock) {
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114 | engineStore.StoreResult(currentGuid, resultXml);
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115 | }
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116 | currentGuid = Guid.Empty;
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117 | currentEngine = null;
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118 | fetchOperationTimer.Interval = 100;
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119 | fetchOperationTimer.Start();
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120 | }
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121 | };
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122 | currentEngine.Execute();
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123 | } else {
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124 | if(InvokeRequired) { Invoke((MethodInvoker)delegate() { statusTextBox.Text = "Waiting for engine"; }); } else statusTextBox.Text = "Waiting for engine";
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125 | fetchOperationTimer.Interval = 5000;
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126 | fetchOperationTimer.Start();
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127 | }
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128 | } catch(TimeoutException timeoutException) {
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129 | currentEngine = null;
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130 | currentGuid = Guid.Empty;
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131 | fetchOperationTimer.Interval = 5000;
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132 | fetchOperationTimer.Start();
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133 | } catch(CommunicationException communicationException) {
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134 | currentEngine = null;
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135 | currentGuid = Guid.Empty;
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136 | fetchOperationTimer.Interval = 5000;
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137 | fetchOperationTimer.Start();
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138 | }
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139 | }
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140 | private ProcessingEngine RestoreEngine(byte[] engine) {
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141 | GZipStream stream = new GZipStream(new MemoryStream(engine), CompressionMode.Decompress);
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142 | return (ProcessingEngine)PersistenceManager.Load(stream);
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143 | }
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144 | private byte[] SaveEngine(IEngine engine) {
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145 | MemoryStream memStream = new MemoryStream();
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146 | GZipStream stream = new GZipStream(memStream, CompressionMode.Compress, true);
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147 | PersistenceManager.Save(engine, stream);
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148 | stream.Close();
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149 | return memStream.ToArray();
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150 | }
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151 | }
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152 | }
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