Mercurial > pub > ImplabNet
annotate Implab/Diagnostics/TextListenerBase.cs @ 66:790e8a997d30
Refactoring
| author | cin |
|---|---|
| date | Thu, 14 Aug 2014 18:08:09 +0400 |
| parents | d9d794b61bb9 |
| children | 4c0e5ef99986 |
| rev | line source |
|---|---|
| 40 | 1 using System; |
| 2 using System.Collections.Generic; | |
| 3 using System.Linq; | |
| 4 using System.Text; | |
| 5 | |
| 6 namespace Implab.Diagnostics { | |
| 7 public abstract class TextListenerBase : ServiceLocator, IEventTextFormatter<object>, IEventTextFormatter<TraceEvent> { | |
| 8 | |
| 9 readonly Dictionary<object, Action> m_subscriptions = new Dictionary<object, Action>(); | |
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10 readonly LogicalOperation m_boundOperation; |
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11 readonly int m_baseIndent; |
| 40 | 12 |
| 48 | 13 protected TextListenerBase(bool global) { |
| 40 | 14 Register(this); |
| 48 | 15 if (!global) { |
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16 m_boundOperation = TraceContext.Current.CurrentOperation; |
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17 m_baseIndent = Math.Max(0, m_boundOperation.Level - 1); |
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18 } |
| 40 | 19 } |
| 20 | |
| 21 public void Subscribe(Type eventType) { | |
| 22 if (eventType == null) | |
| 23 throw new ArgumentNullException("eventType"); | |
| 24 GetType().GetMethod("Subscribe", new Type[0]).MakeGenericMethod(eventType).Invoke(this, null); | |
| 25 } | |
| 26 | |
| 27 public void Subscribe<TEvent>() { | |
| 28 Subscribe<TEvent>(LogChannel<TEvent>.Default); | |
| 29 } | |
| 30 | |
| 31 public void Subscribe<TEvent>(LogChannel<TEvent> channel) { | |
| 32 if (channel == null) | |
| 33 throw new ArgumentNullException("channel"); | |
| 34 | |
| 35 lock (m_subscriptions) { | |
| 36 AssertNotDisposed(); | |
| 37 | |
| 38 var formatter = GetService<IEventTextFormatter<TEvent>>(); | |
| 48 | 39 var channelName = channel.Name; |
| 40 | 40 |
| 41 EventHandler<ValueEventArgs<TEvent>> handler = (sender, args) => { | |
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42 TraceContext context = (TraceContext)sender; |
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43 var text = formatter.Format(context, args.Value); |
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44 text.indent -= m_baseIndent; |
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45 |
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46 if (IsRelated(context.CurrentOperation)) |
| 48 | 47 WriteEntry(context, text, channelName); |
| 40 | 48 }; |
| 49 | |
| 50 if (m_subscriptions.ContainsKey(channel)) | |
| 51 return; | |
| 52 | |
| 53 channel.Events += handler; | |
| 54 | |
| 55 Action unsubscribe = () => { | |
| 56 channel.Events -= handler; | |
| 57 }; | |
| 58 | |
| 59 m_subscriptions.Add(channel, unsubscribe); | |
| 60 } | |
| 61 } | |
| 62 | |
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63 public bool IsRelated(LogicalOperation op) { |
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64 if (m_boundOperation == null) |
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65 return true; |
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66 |
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67 while (op != m_boundOperation && op.Level > m_boundOperation.Level) |
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68 op = op.Parent; |
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69 return op == m_boundOperation; |
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70 } |
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71 |
| 40 | 72 public void Unsubscribe<TEvent>(LogChannel<TEvent> channel) { |
| 73 if (channel == null) | |
| 74 throw new ArgumentNullException("channel"); | |
| 75 | |
| 76 lock (m_subscriptions) { | |
| 77 Action subscription; | |
| 78 if (m_subscriptions.TryGetValue(channel, out subscription)) { | |
| 79 subscription(); | |
| 80 m_subscriptions.Remove(channel); | |
| 81 } | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 public void UnsubscribeAll() { | |
| 86 lock (m_subscriptions) { | |
| 87 foreach (var subscription in m_subscriptions.Values) | |
| 88 subscription(); | |
| 89 m_subscriptions.Clear(); | |
| 90 } | |
| 91 } | |
| 92 | |
| 47 | 93 /// <summary> |
| 94 /// Вызывается для записи текста сообщения, в журнал. | |
| 95 /// </summary> | |
| 96 /// <remarks> | |
| 97 /// Данный метод может вызваться из разных потоков одновременно. Возможна ситуация, когда | |
| 98 /// данный метод вызывается уже после освобождения ообъекта методом <see cref="Dispose()"/>. | |
| 99 /// </remarks> | |
| 100 /// <param name="context">Контекст трассировки.</param> | |
| 101 /// <param name="text">Текст сообщения.</param> | |
| 48 | 102 protected abstract void WriteEntry(TraceContext context, EventText text, string channel); |
| 40 | 103 |
| 104 public EventText Format(TraceContext context, object data) { | |
| 105 return new EventText { | |
| 106 indent = context.CurrentOperation.Level, | |
| 107 content = data.ToString() | |
| 108 }; | |
| 109 } | |
| 110 | |
| 111 public EventText Format(TraceContext context, TraceEvent data) { | |
| 112 var level = context.CurrentOperation.Level; | |
| 113 if (data.EventType == TraceEventType.OperationCompleted || data.EventType == TraceEventType.OperationStarted) | |
| 114 level--; | |
| 115 | |
| 116 return new EventText { | |
| 117 indent = level, | |
| 118 content = data.ToString() | |
| 119 }; | |
| 120 } | |
| 121 | |
| 122 protected override void Dispose(bool disposing) { | |
| 47 | 123 base.Dispose(disposing); |
| 40 | 124 if (disposing) { |
| 125 UnsubscribeAll(); | |
| 126 } | |
| 127 } | |
| 128 } | |
| 129 } |