| | | 1 | | // Copyright (c) Microsoft Corporation. All rights reserved. |
| | | 2 | | // Licensed under the MIT License. |
| | | 3 | | |
| | | 4 | | #nullable enable |
| | | 5 | | |
| | | 6 | | using System; |
| | | 7 | | using System.Collections.Generic; |
| | | 8 | | using System.Diagnostics; |
| | | 9 | | using System.Reflection; |
| | | 10 | | |
| | | 11 | | namespace Azure.Core.Pipeline |
| | | 12 | | { |
| | | 13 | | internal readonly struct DiagnosticScope : IDisposable |
| | | 14 | | { |
| | | 15 | | private readonly DiagnosticActivity? _activity; |
| | | 16 | | |
| | | 17 | | private readonly string _name; |
| | | 18 | | |
| | | 19 | | private readonly DiagnosticListener _source; |
| | | 20 | | |
| | | 21 | | internal DiagnosticScope(string name, DiagnosticListener source) |
| | | 22 | | { |
| | | 23 | | _name = name; |
| | | 24 | | _source = source; |
| | | 25 | | _activity = _source.IsEnabled(_name) ? new DiagnosticActivity(_name) : null; |
| | | 26 | | _activity?.SetW3CFormat(); |
| | | 27 | | } |
| | | 28 | | |
| | | 29 | | public bool IsEnabled => _activity != null; |
| | | 30 | | |
| | | 31 | | public void AddAttribute(string name, string value) |
| | | 32 | | { |
| | | 33 | | _activity?.AddTag(name, value); |
| | | 34 | | } |
| | | 35 | | |
| | | 36 | | public void AddAttribute<T>(string name, T value) |
| | | 37 | | { |
| | | 38 | | if (_activity != null && value != null) |
| | | 39 | | { |
| | | 40 | | AddAttribute(name, value.ToString() ?? string.Empty); |
| | | 41 | | } |
| | | 42 | | } |
| | | 43 | | |
| | | 44 | | public void AddAttribute<T>(string name, T value, Func<T, string> format) |
| | | 45 | | { |
| | | 46 | | if (_activity != null) |
| | | 47 | | { |
| | | 48 | | AddAttribute(name, format(value)); |
| | | 49 | | } |
| | | 50 | | } |
| | | 51 | | |
| | | 52 | | public void AddLink(string id, IDictionary<string, string>? attributes = null) |
| | | 53 | | { |
| | | 54 | | if (_activity != null) |
| | | 55 | | { |
| | | 56 | | var linkedActivity = new Activity("LinkedActivity"); |
| | | 57 | | linkedActivity.SetW3CFormat(); |
| | | 58 | | linkedActivity.SetParentId(id); |
| | | 59 | | |
| | | 60 | | if (attributes != null) |
| | | 61 | | { |
| | | 62 | | foreach (var kvp in attributes) |
| | | 63 | | { |
| | | 64 | | linkedActivity.AddTag(kvp.Key, kvp.Value); |
| | | 65 | | } |
| | | 66 | | } |
| | | 67 | | |
| | | 68 | | _activity.AddLink(linkedActivity); |
| | | 69 | | } |
| | | 70 | | } |
| | | 71 | | |
| | | 72 | | public void Start() |
| | | 73 | | { |
| | | 74 | | if (_activity != null) |
| | | 75 | | { |
| | | 76 | | _source.StartActivity(_activity, _activity); |
| | | 77 | | } |
| | | 78 | | } |
| | | 79 | | |
| | | 80 | | public void SetStartTime(DateTime dateTime) => _activity?.SetStartTime(dateTime); |
| | | 81 | | |
| | | 82 | | public void Dispose() |
| | | 83 | | { |
| | | 84 | | if (_activity == null) |
| | | 85 | | { |
| | | 86 | | return; |
| | | 87 | | } |
| | | 88 | | |
| | | 89 | | if (_source != null) |
| | | 90 | | { |
| | | 91 | | _source.StopActivity(_activity, null); |
| | | 92 | | } |
| | | 93 | | else |
| | | 94 | | { |
| | | 95 | | _activity?.Stop(); |
| | | 96 | | } |
| | | 97 | | } |
| | | 98 | | |
| | | 99 | | public void Failed(Exception e) |
| | | 100 | | { |
| | | 101 | | if (_activity == null) |
| | | 102 | | { |
| | | 103 | | return; |
| | | 104 | | } |
| | | 105 | | |
| | | 106 | | _source?.Write(_activity.OperationName + ".Exception", e); |
| | | 107 | | |
| | | 108 | | } |
| | | 109 | | |
| | | 110 | | private class DiagnosticActivity : Activity |
| | | 111 | | { |
| | | 112 | | private List<Activity>? _links; |
| | | 113 | | |
| | | 114 | | public IEnumerable<Activity> Links => (IEnumerable<Activity>?)_links ?? Array.Empty<Activity>(); |
| | | 115 | | |
| | | 116 | | public DiagnosticActivity(string operationName) : base(operationName) |
| | | 117 | | { |
| | | 118 | | } |
| | | 119 | | |
| | | 120 | | public void AddLink(Activity activity) |
| | | 121 | | { |
| | | 122 | | _links ??= new List<Activity>(); |
| | | 123 | | _links.Add(activity); |
| | | 124 | | } |
| | | 125 | | } |
| | | 126 | | } |
| | | 127 | | |
| | | 128 | | /// <summary> |
| | | 129 | | /// HACK HACK HACK. Some runtime environments like Azure.Functions downgrade System.Diagnostic.DiagnosticSource pack |
| | | 130 | | /// This type is a temporary workaround to avoid the issue. |
| | | 131 | | /// </summary> |
| | | 132 | | internal static class ActivityExtensions |
| | | 133 | | { |
| | 4 | 134 | | private static readonly MethodInfo? s_setIdFormatMethod = typeof(Activity).GetMethod("SetIdFormat"); |
| | 4 | 135 | | private static readonly MethodInfo? s_getIdFormatMethod = typeof(Activity).GetProperty("IdFormat")?.GetMethod; |
| | 4 | 136 | | private static readonly MethodInfo? s_getTraceStateStringMethod = typeof(Activity).GetProperty("TraceStateString |
| | | 137 | | |
| | | 138 | | public static bool SetW3CFormat(this Activity activity) |
| | | 139 | | { |
| | 0 | 140 | | if (s_setIdFormatMethod == null) return false; |
| | | 141 | | |
| | 1932 | 142 | | s_setIdFormatMethod.Invoke(activity, new object[]{ 2 /* ActivityIdFormat.W3C */}); |
| | | 143 | | |
| | 1932 | 144 | | return true; |
| | | 145 | | } |
| | | 146 | | |
| | | 147 | | public static bool IsW3CFormat(this Activity activity) |
| | | 148 | | { |
| | 0 | 149 | | if (s_getIdFormatMethod == null) return false; |
| | | 150 | | |
| | 0 | 151 | | object? result = s_getIdFormatMethod.Invoke(activity, Array.Empty<object>()); |
| | | 152 | | |
| | 0 | 153 | | return result != null && (int)result == 2 /* ActivityIdFormat.W3C */; |
| | | 154 | | } |
| | | 155 | | |
| | | 156 | | public static bool TryGetTraceState(this Activity activity, out string? traceState) |
| | | 157 | | { |
| | 0 | 158 | | traceState = null; |
| | | 159 | | |
| | 0 | 160 | | if (s_getTraceStateStringMethod == null) return false; |
| | | 161 | | |
| | 0 | 162 | | traceState = s_getTraceStateStringMethod.Invoke(activity, Array.Empty<object>()) as string; |
| | | 163 | | |
| | 0 | 164 | | return true; |
| | | 165 | | } |
| | | 166 | | } |
| | | 167 | | } |