Mercurial > pub > ImplabNet

annotate Implab/Diagnostics/Trace.cs @ 260:547a2fc0d93e v3 v3.0.6

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minor fixes
author cin
date Fri, 13 Apr 2018 19:14:59 +0300
parents b00441e04738
children f07be402ab02
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Diagnostics;
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4 using System.Linq;
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5 using System.Text;
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6 using System.Threading;
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7 using System.Threading.Tasks;
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8
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9 namespace Implab.Diagnostics {
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10 public static class Trace<T> {
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11
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12 public static TraceSource TraceSource { get; } = new TraceSource(typeof(T).Name);
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13
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14 #if NETFX_TRACE_BUG
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15 readonly static AsyncLocal<object> m_currentOperation = new AsyncLocal<object>();
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16 #endif
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17
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18 /// <summary>
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19 /// Starts the logical operation nested to the current operation nested to the current one.
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20 /// </summary>
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21 public static void StartLogicalOperation() {
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22 Trace.CorrelationManager.StartLogicalOperation();
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23
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24 }
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25
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26 /// <summary>
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27 /// Starts the logical operation with the specified name, this name is usefull in logs.
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28 /// </summary>
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29 /// <param name="name">Name.</param>
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30 #if NETFX_TRACE_BUG
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31 public static void StartLogicalOperation(object name) {
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32 m_currentOperation.Value = name;
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33 Trace.CorrelationManager.StartLogicalOperation(name);
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34 }
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35 #else
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36 public static void StartLogicalOperation(object name) {
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37 Trace.CorrelationManager.StartLogicalOperation(name);
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38 }
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39 #endif
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40
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41 /// <summary>
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42 /// Ends the logical operation and restores the previous one.
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43 /// </summary>
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44 public static void StopLogicalOperation() {
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45 Trace.CorrelationManager.StopLogicalOperation();
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46 }
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47
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48 /// <summary>
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49 /// Writes an informational message.
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50 /// </summary>
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51 /// <param name="format">Format.</param>
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52 /// <param name="arguments">Arguments.</param>
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53 [Conditional("TRACE")]
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54 public static void Log(string format, params object[] arguments) {
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55 TraceSource.TraceEvent(TraceEventType.Information, 0, format, arguments);
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56 }
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57
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58 /// <summary>
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59 /// Writes a warning message.
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60 /// </summary>
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61 /// <param name="format">Format.</param>
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62 /// <param name="arguments">Arguments.</param>
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63 [Conditional("TRACE")]
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64 public static void Warn(string format, params object[] arguments) {
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65 TraceSource.TraceEvent(TraceEventType.Warning, 0, format, arguments);
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66 }
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67
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68 [Conditional("TRACE")]
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69 public static void Error(string format, params object[] arguments) {
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70 TraceSource.TraceEvent(TraceEventType.Error, 0, format, arguments);
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71 }
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72
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73 [Conditional("TRACE")]
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74 public static void Error(Exception err) {
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75 TraceSource.TraceData(TraceEventType.Error, 0, err);
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76 }
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77
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78 /// <summary>
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79 /// This method save the current activity, and transfers to the specified activity,
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80 /// emits <see cref="TraceEventType.Start"/> and returns a scope of the new
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81 /// activity.
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82 /// </summary>
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83 /// <param name="activityName">The name of the new activity/</param>
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84 /// <param name="activityId">The identifier of the activity to which
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85 /// the control will be transferred</param>
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86 /// <returns>A scope of the new activity, dispose it to transfer
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87 /// the control back to the original activity.</returns>
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88 public static ActivityScope TransferActivity(string activityName, Guid activityId) {
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89 var prev = Trace.CorrelationManager.ActivityId;
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90
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91 TraceSource.TraceTransfer(0, "Transfer", activityId);
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92 Trace.CorrelationManager.ActivityId = activityId;
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93 TraceSource.TraceEvent(TraceEventType.Start, 0, activityName);
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94
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95 return new ActivityScope(TraceSource, prev, 0, activityName);
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96 }
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97
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98 /// <summary>
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99 /// Emits <see cref="TraceEventType.Start"/> and returns a scope of the
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100 /// activity.
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101 /// </summary>
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102 /// <param name="activityName">The name of the activity to start</param>
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103 /// <returns>A scope of the new activity, dispose it to emit
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104 /// <see cref="TraceEventType.Stop"/> for the current activity.</returns>
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105 public static ActivityScope StartActivity(string activityName) {
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106 if (Trace.CorrelationManager.ActivityId == Guid.Empty)
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107 Trace.CorrelationManager.ActivityId = Guid.NewGuid();
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108
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109 var prev = Trace.CorrelationManager.ActivityId;
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110
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111 TraceSource.TraceEvent(TraceEventType.Start, 0, activityName);
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112 return new ActivityScope(TraceSource, prev, 0, activityName);
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113 }
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114
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115 /// <summary>
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116 /// Creates new <see cref="LogicalOperation(string)"/> and calls
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117 /// to <see cref="CorrelationManager.StartLogicalOperation(object)"/>
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118 /// passing the created operation as identity. Calls
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119 /// <see cref="TraceSource.TraceData(TraceEventType, int, object)"/>
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120 /// to notify listeners on operation start.
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121 /// </summary>
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122 /// <param name="name">The name of the logical operation.</param>
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123 /// <returns>Logical operation scope, disposing it will stop
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124 /// logical operation and notify trace listeners.</returns>
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125 public static LogicalOperationScope LogicalOperation(string name) {
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126 var operation = new LogicalOperation(name);
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127 TraceSource.TraceData(TraceEventType.Information, TraceEventCodes.StartLogicalOperation, operation);
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128 StartLogicalOperation(operation);
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129 return new LogicalOperationScope(TraceSource, operation);
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130 }
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131 }
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132 }