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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 LogContext {
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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 LogContext 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 LogContext _current;
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19
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20 public static LogContext Current {
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21 get {
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22 if (_current == null)
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23 _current = new LogContext();
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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 LogContext(LogContext 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 TraceEvent(TraceEventType.Transfer, String.Empty);
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38 }
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39
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40 LogContext() {
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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(LogContext from) {
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47 _current = from == null ? new LogContext() : new LogContext(from);
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48 }
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49
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50 public LogContext 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 TraceEvent(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 TraceEvent(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 TraceEvent(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 public void TraceEvent(TraceEventType type, string format, params object[] args) {
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94 /*var msg = new StringBuilder();
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95 for (int i = 0; i < CurrentOperation.Level; i++)
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96 msg.Append(" ");
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97 msg.Append(type);
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98 msg.AppendFormat("[{0}]: ",m_threadId);
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99 msg.AppendFormat(format, args);
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100
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101 lock (_consoleLock) {
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102 Console.ForegroundColor = (ConsoleColor)(m_threadId % 15 + 1);
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103 Console.WriteLine(msg.ToString());
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104 }*/
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105 }
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106 }
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107 }
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