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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 using System.Threading;
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6 using System.Threading.Tasks;
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7
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8 namespace Implab.Diagnostics {
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9 public class TraceContext {
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10 LogicalOperation m_currentOperation;
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11 readonly LogicalOperation m_traceBound;
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12 readonly int m_threadId;
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13 readonly TraceContext m_parent;
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14
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15 readonly static object _consoleLock = new object();
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16
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17 [ThreadStatic]
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18 static TraceContext _current;
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19
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20 public static TraceContext Current {
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21 get {
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22 if (_current == null)
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23 _current = new TraceContext();
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24 return _current;
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25 }
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26 }
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27
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28 TraceContext(TraceContext context) {
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29 if (context == null)
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30 throw new ArgumentNullException("context");
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31
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32 m_parent = context;
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33 m_currentOperation = context.CurrentOperation;
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34 m_traceBound = context.CurrentOperation;
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35 m_threadId = Thread.CurrentThread.ManagedThreadId;
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36
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37 LogEvent(TraceEventType.Transfer, String.Empty);
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38 }
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39
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40 TraceContext() {
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41 m_currentOperation = new LogicalOperation();
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42 m_traceBound = m_currentOperation;
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43 m_threadId = Thread.CurrentThread.ManagedThreadId;
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44 }
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45
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46 public static void Transfer(TraceContext from) {
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47 _current = from == null ? new TraceContext() : new TraceContext(from);
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48 }
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49
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50 public TraceContext ParentContext {
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51 get {
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52 return m_parent;
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53 }
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54 }
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55
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56 public LogicalOperation CurrentOperation {
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57 get {
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58 return m_currentOperation;
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59 }
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60 }
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61
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62 public LogicalOperation TraceBound {
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63 get {
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64 return m_traceBound;
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65 }
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66 }
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67
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68 public int ThreadId {
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69 get {
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70 return m_threadId;
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71 }
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72 }
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73
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74 public void StartLogicalOperation() {
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75 StartLogicalOperation(null);
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76 }
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77
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78 public void StartLogicalOperation(string name) {
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79 LogEvent(TraceEventType.OperationStarted, "{0}", name);
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80 m_currentOperation = new LogicalOperation(name, m_currentOperation);
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81 }
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82
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83 public void EndLogicalOperation() {
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84 if (m_traceBound == m_currentOperation) {
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85 LogEvent(TraceEventType.Error, "Trying to end the operation which isn't belongs to current trace");
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86 } else {
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87 var op = m_currentOperation;
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88 m_currentOperation = m_currentOperation.Parent;
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89 LogEvent(TraceEventType.OperationCompleted, "{0} {1} ms", op.Name, op.Duration);
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90 }
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91 }
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92
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93 void LogEvent(TraceEventType type, string format, params object[] args) {
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94 LogChannel<TraceEvent>.Default.LogEvent(TraceEvent.Create(type, format, args));
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95 }
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96 }
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97 }
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