annotate Implab/Diagnostics/LogChannel.cs @ 210:5dc21f6a3222 v2

Code review for RunnableComponent Added StaApartment class based on System.Windows.Forms.Application message loop
author cin
date Mon, 20 Mar 2017 17:44:18 +0300
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Linq;
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4 using System.Text;
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5
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6 namespace Implab.Diagnostics {
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7 /// <summary>
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8 /// Канал, через который публикуются события журнала.
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9 /// </summary>
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10 /// <typeparam name="TEvent">Тип событий в канале</typeparam>
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11 /// <remarks>
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12 /// Событиями журнала могут быть любые типы, например строки, в которых будет передаваться
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13 /// информация, или структуры с набором полей, описывающих важность, текст и другую информацию.
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14 /// </remarks>
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15 public class LogChannel<TEvent> {
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16 static LogChannel<TEvent> _default = new LogChannel<TEvent>();
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17
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18 /// <summary>
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19 /// Канал по-умолчанию для событий типа <typeparam name="TEvent"/>.
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20 /// </summary>
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21 public static LogChannel<TEvent> Default {
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22 get {
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23 return _default;
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24 }
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25 }
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26
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27 /// <summary>
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28 /// Событие появление новой записи в журнале, на это событие подписываются слушатели.
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29 /// </summary>
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30 public event EventHandler<LogEventArgs<TEvent>> Events;
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31
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32 /// <summary>
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33 /// Имя канала, полезно для отображения в журнале
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34 /// </summary>
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35 public string Name {
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36 get;
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37 private set;
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38 }
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40 /// <summary>
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41 /// Создает журнал, имя типа событий назначается в качетве имени канала.
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42 /// </summary>
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43 public LogChannel()
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44 : this(null) {
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45 }
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46
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47 /// <summary>
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48 /// Содает канал с указанным именем.
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49 /// </summary>
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50 /// <param name="name">Имя канала.</param>
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51 public LogChannel(string name) {
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52 if (String.IsNullOrEmpty(name))
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53 name = typeof(TEvent).Name;
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54 Name = name;
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55 }
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56
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57 /// <summary>
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58 /// Отправляет запись журнала через канал подписчикам.
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59 /// </summary>
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60 /// <param name="data">Запись журнала.</param>
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61 /// <remarks>
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62 /// Контекст трассировки от которого рассылается сообщение определяется автоматически из текущего потока.
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63 /// </remarks>
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64 public void LogEvent(TEvent data) {
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65 var t = Events;
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66 if (t != null) {
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67 var traceContext = TraceContext.Instance;
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68 t(
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69 this,
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70 new LogEventArgs<TEvent>(
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71 data,
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72 this,
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73 traceContext.ThreadId,
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74 traceContext.CurrentOperation,
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75 traceContext.CurrentOperation.Duration
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76 )
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77 );
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78 }
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79 }
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81 public override string ToString() {
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82 return Name;
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83 }
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84 }
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85 }