Mercurial > pub > ImplabNet
annotate Implab/Diagnostics/TextListenerBase.cs @ 44:e5ec543feee3
Рефакторинг, журналирование
| author | cin |
|---|---|
| date | Wed, 16 Apr 2014 19:02:58 +0400 |
| parents | 7c2369f580b8 |
| children | b181f7bcb259 |
| 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 |
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13 protected TextListenerBase(bool local) { |
| 40 | 14 Register(this); |
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15 if (local) { |
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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>>(); | |
| 39 | |
| 40 EventHandler<ValueEventArgs<TEvent>> handler = (sender, args) => { | |
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41 TraceContext context = (TraceContext)sender; |
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42 var text = formatter.Format(context, args.Value); |
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43 text.indent -= m_baseIndent; |
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44 |
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45 if (IsRelated(context.CurrentOperation)) |
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46 WriteEntry(context, text); |
| 40 | 47 }; |
| 48 | |
| 49 if (m_subscriptions.ContainsKey(channel)) | |
| 50 return; | |
| 51 | |
| 52 channel.Events += handler; | |
| 53 | |
| 54 Action unsubscribe = () => { | |
| 55 channel.Events -= handler; | |
| 56 }; | |
| 57 | |
| 58 m_subscriptions.Add(channel, unsubscribe); | |
| 59 } | |
| 60 } | |
| 61 | |
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62 public bool IsRelated(LogicalOperation op) { |
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63 if (m_boundOperation == null) |
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64 return true; |
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65 |
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66 while (op != m_boundOperation && op.Level > m_boundOperation.Level) |
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67 op = op.Parent; |
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68 return op == m_boundOperation; |
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69 } |
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70 |
| 40 | 71 public void Unsubscribe<TEvent>(LogChannel<TEvent> channel) { |
| 72 if (channel == null) | |
| 73 throw new ArgumentNullException("channel"); | |
| 74 | |
| 75 lock (m_subscriptions) { | |
| 76 Action subscription; | |
| 77 if (m_subscriptions.TryGetValue(channel, out subscription)) { | |
| 78 subscription(); | |
| 79 m_subscriptions.Remove(channel); | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 public void UnsubscribeAll() { | |
| 85 lock (m_subscriptions) { | |
| 86 foreach (var subscription in m_subscriptions.Values) | |
| 87 subscription(); | |
| 88 m_subscriptions.Clear(); | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 protected abstract void WriteEntry(TraceContext context, EventText text); | |
| 93 | |
| 94 public EventText Format(TraceContext context, object data) { | |
| 95 return new EventText { | |
| 96 indent = context.CurrentOperation.Level, | |
| 97 content = data.ToString() | |
| 98 }; | |
| 99 } | |
| 100 | |
| 101 public EventText Format(TraceContext context, TraceEvent data) { | |
| 102 var level = context.CurrentOperation.Level; | |
| 103 if (data.EventType == TraceEventType.OperationCompleted || data.EventType == TraceEventType.OperationStarted) | |
| 104 level--; | |
| 105 | |
| 106 return new EventText { | |
| 107 indent = level, | |
| 108 content = data.ToString() | |
| 109 }; | |
| 110 } | |
| 111 | |
| 112 protected override void Dispose(bool disposing) { | |
| 113 if (disposing) { | |
| 114 UnsubscribeAll(); | |
| 115 } | |
| 116 base.Dispose(disposing); | |
| 117 } | |
| 118 } | |
| 119 } |