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source: trunk/sources/HeuristicLab.Core/3.3/ThreadSafeLog.cs @ 6451

Last change on this file since 6451 was 6424, checked in by cneumuel, 14 years ago

#1545 added threadsafe log

File size: 4.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using System.Threading;
27using HeuristicLab.Common;
28using HeuristicLab.Common.Resources;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Core {
32  [Item("ThreadSafeLog", "A thread-safe log for logging string messages.")]
33  [StorableClass]
34  public class ThreadSafeLog : Item, ILog, IStorableContent {
35    protected ReaderWriterLockSlim locker = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
36
37    public string Filename { get; set; }
38
39    public override Image ItemImage {
40      get { return VSImageLibrary.File; }
41    }
42
43    public IEnumerable<string> Messages {
44      get {
45        locker.EnterReadLock();
46        try {
47          return log.Messages.ToArray(); // return copy of messages
48        }
49        finally { locker.ExitReadLock(); }
50      }
51    }
52
53    [Storable]
54    protected ILog log;
55
56    [StorableConstructor]
57    protected ThreadSafeLog(bool deserializing) : base(deserializing) { }
58    public ThreadSafeLog()
59      : base() {
60      this.log = new Log();
61      RegisterLogEvents();
62    }
63    public ThreadSafeLog(ILog log)
64      : base() {
65      this.log = log;
66      RegisterLogEvents();
67    }
68    ~ThreadSafeLog() {
69      locker.Dispose();
70    }
71
72    protected ThreadSafeLog(ThreadSafeLog original, Cloner cloner)
73      : base(original, cloner) {
74      log = cloner.Clone(original.log);
75    }
76    public override IDeepCloneable Clone(Cloner cloner) {
77      return new ThreadSafeLog(this, cloner);
78    }
79
80    public virtual void Clear() {
81      locker.EnterWriteLock();
82      try {
83        log.Clear();
84      }
85      finally { locker.ExitWriteLock(); }
86    }
87
88    public virtual void LogMessage(string message) {
89      locker.EnterWriteLock();
90      try {
91        log.LogMessage(message);
92      }
93      finally { locker.ExitWriteLock(); }
94    }
95
96    public virtual void LogException(Exception ex) {
97      locker.EnterWriteLock();
98      try {
99        log.LogException(ex);
100      }
101      finally { locker.ExitWriteLock(); }
102    }
103
104    #region Log Events
105    private void RegisterLogEvents() {
106      this.log.Cleared += new EventHandler(log_Cleared);
107      this.log.MessageAdded += new EventHandler<EventArgs<string>>(log_MessageAdded);
108      this.log.ToStringChanged += new EventHandler(log_ToStringChanged);
109    }
110
111    private void log_ToStringChanged(object sender, EventArgs e) {
112      OnToStringChanged();
113    }
114
115    private void log_MessageAdded(object sender, EventArgs<string> e) {
116      OnMessageAdded(e.Value);
117    }
118
119    private void log_Cleared(object sender, EventArgs e) {
120      OnCleared();
121    }
122    #endregion
123
124    #region Event Handler
125    public event EventHandler<EventArgs<string>> MessageAdded;
126    protected virtual void OnMessageAdded(string message) {
127      EventHandler<EventArgs<string>> handler = MessageAdded;
128      if (handler != null) handler(this, new EventArgs<string>(message));
129    }
130    public event EventHandler Cleared;
131    protected virtual void OnCleared() {
132      EventHandler handler = Cleared;
133      if (handler != null) handler(this, EventArgs.Empty);
134    }
135    #endregion
136  }
137}
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