1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 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.Drawing;
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25 | using System.Linq;
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26 | using System.Threading;
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27 | using HeuristicLab.Common;
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28 | using HeuristicLab.Core;
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29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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30 |
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31 | namespace HeuristicLab.Clients.Hive {
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32 | [Item("Log", "A thread-safe log for logging string messages.")]
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33 | [StorableClass]
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34 | public class ThreadSafeLog : Item, ILog, IStorableContent {
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35 | protected ReaderWriterLockSlim locker = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
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36 |
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37 | public string Filename { get; set; }
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38 |
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39 | public override Image ItemImage {
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40 | get { return HeuristicLab.Common.Resources.VSImageLibrary.File; }
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41 | }
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42 |
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43 | public IEnumerable<string> Messages {
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44 | get {
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45 | locker.EnterReadLock();
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46 | try {
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47 | return log.Messages.ToArray();
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48 | }
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49 | finally { locker.ExitReadLock(); }
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50 | }
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51 | }
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52 |
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53 | [Storable]
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54 | protected ILog log;
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55 |
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56 | [StorableConstructor]
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57 | protected ThreadSafeLog(bool deserializing) : base(deserializing) { }
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58 | protected ThreadSafeLog(ThreadSafeLog original, Cloner cloner)
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59 | : base(original, cloner) {
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60 | log = cloner.Clone(original.log);
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61 | }
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62 | public ThreadSafeLog(ILog log)
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63 | : base() {
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64 | this.log = log;
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65 | RegisterLogEvents();
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66 | }
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67 |
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68 | public override IDeepCloneable Clone(Cloner cloner) {
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69 | return new ThreadSafeLog(this, cloner);
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70 | }
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71 |
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72 | public virtual void Clear() {
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73 | locker.EnterWriteLock();
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74 | try {
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75 | log.Clear();
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76 | }
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77 | finally { locker.ExitWriteLock(); }
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78 | }
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79 | public virtual void LogMessage(string message) {
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80 | locker.EnterWriteLock();
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81 | try {
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82 | log.LogMessage(message);
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83 | }
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84 | finally { locker.ExitWriteLock(); }
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85 | }
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86 | public virtual void LogException(Exception ex) {
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87 | locker.EnterWriteLock();
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88 | try {
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89 | log.LogException(ex);
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90 | }
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91 | finally { locker.ExitWriteLock(); }
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92 | }
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93 |
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94 | #region Log Events
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95 | private void RegisterLogEvents() {
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96 | this.log.Cleared += new EventHandler(log_Cleared);
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97 | this.log.MessageAdded += new EventHandler<EventArgs<string>>(log_MessageAdded);
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98 | this.log.ToStringChanged += new EventHandler(log_ToStringChanged);
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99 | }
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100 |
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101 | private void log_ToStringChanged(object sender, EventArgs e) {
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102 | OnToStringChanged();
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103 | }
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104 |
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105 | private void log_MessageAdded(object sender, EventArgs<string> e) {
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106 | OnMessageAdded(e.Value);
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107 | }
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108 |
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109 | private void log_Cleared(object sender, EventArgs e) {
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110 | OnCleared();
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111 | }
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112 | #endregion
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113 |
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114 | #region Event Handler
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115 | public event EventHandler<EventArgs<string>> MessageAdded;
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116 | protected virtual void OnMessageAdded(string message) {
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117 | EventHandler<EventArgs<string>> handler = MessageAdded;
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118 | if (handler != null) handler(this, new EventArgs<string>(message));
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119 | }
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120 | public event EventHandler Cleared;
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121 | protected virtual void OnCleared() {
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122 | EventHandler handler = Cleared;
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123 | if (handler != null) handler(this, EventArgs.Empty);
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124 | }
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125 | #endregion
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126 | }
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127 | }
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