private static IEnumerable <MethodInfo> GetEventMethods(EventSource eventSource)
{
#if WINRT || WINDOWS_UWP
IEnumerable <MethodInfo> methods = eventSource.GetType().GetRuntimeMethods();
#else
MethodInfo[] methods = eventSource.GetType().GetMethods();
#endif
return(methods.Where(m => m.GetCustomAttributes(typeof(EventAttribute), false).Any()));
}
/// <summary>
/// Parses the <see cref="EventSource"/> class and returns the <see cref="EventSourceInfo"/> object
/// </summary>
/// <param name="eventSource">Event source to be parsed</param>
/// <param name="friendlyName">Friendly name of the event source</param>
/// <returns>event source info</returns>
public static EventSourceInfo Parse(EventSource eventSource, string friendlyName)
{
if (string.IsNullOrEmpty(friendlyName))
{
friendlyName = eventSource.Name;
}
var info = new EventSourceInfo {
FriendlyName = friendlyName,
};
foreach (var method in eventSource.GetType().GetMethods())
{
var eventAttribute = method.GetCustomAttribute <EventAttribute>();
if (eventAttribute == null)
{
continue;
}
var id = eventAttribute.EventId;
var name = method.Name;
var parameters = method.GetParameters().Select(p => p.Name).ToArray();
info.events.Add(id, Tuple.Create(name, parameters));
}
return(info);
}
public void DoesNotLeakWithActionsDefinedInDisplayClass()
{
var source = new EventSource();
var counter = 0;
Action action = () =>
{
counter++;
};
var weakEventListener = WeakEventListener.SubscribeToWeakEvent(this, source, "PublicEvent", action);
Assert.AreEqual(0, counter);
source.RaisePublicEvent();
Assert.AreEqual(1, counter);
// Some dummy code to make sure the previous listener is removed
GC.Collect();
//Assert.IsTrue(weakEventListener.IsSourceAlive);
//Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
/// <summary>
/// Create handlers for all AI telemetry types.
/// </summary>
private Dictionary <Type, Action <ITelemetry> > CreateTelemetryHandlers(EventSource eventSource)
{
var telemetryHandlers = new Dictionary <Type, Action <ITelemetry> >();
var eventSourceType = eventSource.GetType();
// EventSource.Write<T> (String, EventSourceOptions, T)
var writeGenericMethod = eventSourceType.GetMethods(BindingFlags.Instance | BindingFlags.Public)
.Where(m => m.Name == "Write" && m.IsGenericMethod == true)
.Select(m => new { Method = m, Parameters = m.GetParameters() })
.Where(m => m.Parameters.Length == 3 &&
m.Parameters[0].ParameterType.FullName == "System.String" &&
m.Parameters[1].ParameterType.FullName == "System.Diagnostics.Tracing.EventSourceOptions" &&
m.Parameters[2].ParameterType.FullName == null && m.Parameters[2].ParameterType.IsByRef == false)
.Select(m => m.Method)
.SingleOrDefault();
if (writeGenericMethod != null)
{
var eventSourceOptionsType = eventSourceType.Assembly.GetType("System.Diagnostics.Tracing.EventSourceOptions");
var eventSourceOptionsKeywordsProperty = eventSourceOptionsType.GetProperty("Keywords", BindingFlags.Public | BindingFlags.Instance);
// Request
telemetryHandlers.Add(typeof(RequestTelemetry), this.CreateHandlerForRequestTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
// Trace
telemetryHandlers.Add(typeof(TraceTelemetry), this.CreateHandlerForTraceTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
// Event
telemetryHandlers.Add(typeof(EventTelemetry), this.CreateHandlerForEventTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
// Dependency
telemetryHandlers.Add(typeof(DependencyTelemetry), this.CreateHandlerForDependencyTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
// Metric
telemetryHandlers.Add(typeof(MetricTelemetry), this.CreateHandlerForMetricTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
// Exception
telemetryHandlers.Add(typeof(ExceptionTelemetry), this.CreateHandlerForExceptionTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
#pragma warning disable 618
// PerformanceCounter
telemetryHandlers.Add(typeof(PerformanceCounterTelemetry), this.CreateHandlerForPerformanceCounterTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
#pragma warning restore 618
// PageView
telemetryHandlers.Add(typeof(PageViewTelemetry), this.CreateHandlerForPageViewTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
#pragma warning disable 618
// SessionState
telemetryHandlers.Add(typeof(SessionStateTelemetry), this.CreateHandlerForSessionStateTelemetry(eventSource, writeGenericMethod, eventSourceOptionsType, eventSourceOptionsKeywordsProperty));
#pragma warning restore 618
}
else
{
CoreEventSource.Log.LogVerbose("Unable to get method: EventSource.Write<T>(String, EventSourceOptions, T)");
}
return(telemetryHandlers);
}
public EventSourceVersion GetLastCommittedVersion(EventSource eventSource, Guid eventSourceId)
{
var eventSourceParam = new OracleParameter(EventParameters.EVENTSOURCE, OracleDbType.NVarchar2, 512);
eventSourceParam.Value = eventSource.GetType().AssemblyQualifiedName;
var eventSourceIdParam = new OracleParameter(EventParameters.EVENTSOURCEID, OracleDbType.Raw, 16);
eventSourceIdParam.Value = eventSourceId.ToByteArray();
var version = EventSourceVersion.Zero;
try
{
OpenConnection();
using (var command = _connection.CreateCommand())
{
command.CommandText = LAST_VERSION_STATEMENT;
command.Parameters.Add(eventSourceIdParam);
command.Parameters.Add(eventSourceParam);
command.BindByName = true;
var reader = command.ExecuteReader(CommandBehavior.SingleResult);
if (reader.Read())
{
version = EventSourceVersion.FromCombined(Convert.ToDouble(reader.GetDecimal(0)));
}
}
}
finally
{
EnsureConnectionClosed(_connection);
}
return(version);
}
/// <summary>
/// Enable receiving events
/// </summary>
protected override void OnEventSourceCreated(EventSource eventSource)
{
if (eventSource != null && eventSource.Name == SqlEventSourceName && eventSource.GetType().FullName == EventSourceTypeName)
{
EnableEvents(eventSource, EventLevel.Informational, (EventKeywords)1);
}
base.OnEventSourceCreated(eventSource);
}
private ICollection <EventSchema> GetEventSchemas(EventSource eventSource)
{
if (eventSource == null)
{
throw new ArgumentNullException("eventSource");
}
try
{
var manifest = EventSource.GenerateManifest(
eventSource.GetType(),
Assembly.GetAssembly(eventSource.GetType()).Location
);
this.CheckForBadFormedManifest(manifest);
return(new EventSourceSchemaReader().GetSchema(manifest).Values);
}
catch (EventSourceAnalyzerException)
{
throw;
}
catch (Exception e)
{
if (eventSource.ConstructionException != null)
{
throw new EventSourceAnalyzerException(
e.Message,
eventSource.ConstructionException
);
}
throw new EventSourceAnalyzerException(
string.Format(
CultureInfo.CurrentCulture,
Resources.EventSourceAnalyzerManifestGenerationError,
e.Message,
EventSource.GenerateManifest(
eventSource.GetType(),
null
)));
}
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var eventSourceType = eventSource.GetType();
var query = Query.And(
Query.EQ("EventSourceId", eventSourceId),
Query.EQ("EventSource", eventSourceType.AssemblyQualifiedName)
);
var cursor = _collection.FindAs <BsonDocument>(query);
var documents = cursor.ToArray();
var events = ToEvents(documents);
var stream = new CommittedEventStream(eventSourceId);
stream.Append(events);
return(stream);
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
using (var session = _documentStore.OpenSession())
{
var eventSourceType = eventSource.GetType();
var events = session.Query <IEvent>()
.Where(
e => e.EventSourceId == eventSourceId &&
e.EventSource == eventSourceType.AssemblyQualifiedName
).ToArray();
var stream = new CommittedEventStream(eventSourceId);
stream.Append(events);
return(stream);
}
}
private ICollection <EventSchema> GetEventSchemas(EventSource eventSource)
{
try
{
string manifest = EventSource.GenerateManifest(eventSource.GetType(), null);
this.CheckForBadFormedManifest(manifest);
return(new EventSourceSchemaReader().GetSchema(manifest).Values);
}
catch (EventSourceAnalyzerException)
{
throw;
}
catch (Exception e)
{
throw new EventSourceAnalyzerException(string.Format(CultureInfo.CurrentCulture, Resources.EventSourceAnalyzerManifestGenerationError, e.Message, EventSource.GenerateManifest(eventSource.GetType(), null)));
}
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var committedEventStream = new CommittedEventStream(eventSourceId);
var eventSourceParam = new OracleParameter(EventParameters.EVENTSOURCE, OracleDbType.NVarchar2, 512);
eventSourceParam.Value = eventSource.GetType().AssemblyQualifiedName;
var eventSourceIdParam = new OracleParameter(EventParameters.EVENTSOURCEID, OracleDbType.Raw, 16);
eventSourceIdParam.Value = eventSourceId.ToByteArray();
var eventDtos = new List <EventDto>();
try
{
OpenConnection();
using (var command = _connection.CreateCommand())
{
command.CommandText = READ_STATEMENT_FOR_EVENTS_BY_AGGREGATE_ROOT;
command.Parameters.Add(eventSourceIdParam);
command.Parameters.Add(eventSourceParam);
command.BindByName = true;
var reader = command.ExecuteReader();
while (reader.Read())
{
eventDtos.Add(MapReaderToEventDto(reader));
}
}
}
finally
{
EnsureConnectionClosed(_connection);
}
var retrievedEvents = eventDtos.Select(BuildEventInstanceFromDto)
.Select(@event => _eventMigratorManager.Migrate(@event))
.ToList();
if (retrievedEvents.Any())
{
committedEventStream.Append(retrievedEvents);
}
return(committedEventStream);
}
public void DoesNotLeakWithoutAnyInvocation()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = WeakEventListener <EventListener, EventSource, ViewModelClosedEventArgs> .SubscribeToWeakGenericEvent(listener, source, "PublicEvent", listener.OnPublicEvent);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
public static void Write(this EventSource log, int eventCode, object context)
{
try
{
var type = context.GetType();
var method =
log.GetType().GetMethods().FirstOrDefault(x => x.GetCustomAttributes(typeof(EventAttribute), true).Any() && ((EventAttribute)x.GetCustomAttributes(typeof(EventAttribute), true).First()).EventId == eventCode);
if (method != null)
{
var parameters = new List <object>();
method.GetParameters().ToList().ForEach(value => parameters.Add(type.GetProperty(value.Name).GetValue(context)));
method.Invoke(log, parameters.ToArray());
}
}
catch (Exception)
{
//try log error
}
}
public void DoesNotLeakWithStaticEventHandlers()
{
var source = new EventSource();
var weakEventListener = WeakEventListener <EventListener, EventSource, ViewModelClosedEventArgs> .SubscribeToWeakGenericEvent(null, source, "PublicEvent", EventListener.OnEventStaticHandler);
Assert.AreEqual(0, EventListener.StaticEventHandlerCounter);
source.RaisePublicEvent();
Assert.AreEqual(1, EventListener.StaticEventHandlerCounter);
// Some dummy code to make sure the previous source is removed
source = new EventSource();
GC.Collect();
var type = source.GetType();
Assert.IsFalse(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
}
/// <summary>
/// Detaches this eventwrapper to be able to GC it later
/// </summary>
/// <param name="pathDetach">True if in middle path (just for debugging, doesnt matter which value is passed)</param>
public void Detach(bool pathDetach = false)
{
if (PropertyFilter != null)
{
EventSource.PropertyChanged -= SourcePropertyChanged;
}
else
{
EventSource.PropertyChanged -= PathPropertyChanged;
}
#if DEBUG
if (pathDetach)
{
Debug.WriteLine("Path detach: " + EventSource.GetType().Name + ":" + EventSource.GetHashCode() + " from " + PropertyFilter);
}
else
{
Debug.WriteLine("Final detach: " + EventSource.GetType().Name + ":" + EventSource.GetHashCode());
}
#endif
}
public EventSourceVersion GetLastCommittedVersion(EventSource eventSource, Guid eventSourceId)
{
var eventPath = GetPathFor(eventSource.GetType().Name, eventSourceId);
var first = Directory.GetFiles(eventPath).OrderByDescending(f => f).FirstOrDefault();
if (first == null)
{
return(EventSourceVersion.Zero);
}
var json = File.ReadAllText(first);
var target = new EventHolder
{
Type = typeof(string),
Version = EventSourceVersion.Zero,
Event = string.Empty
};
_serializer.FromJson(target, json);
return(target.Version);
}
public void DoesNotLeakWithPrivateEventHandlerSubscribedFromClassItself()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = listener.SubscribeToPrivateClassEvent(source);
Assert.AreEqual(0, listener.PrivateClassEventCount);
source.RaisePublicEvent();
Assert.AreEqual(1, listener.PrivateClassEventCount);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
#pragma warning disable 1591 // Xml Comments
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var eventPath = GetPathFor(eventSource.GetType().Name, eventSourceId);
var files = Directory.GetFiles(eventPath).OrderBy(f => f);
var stream = new CommittedEventStream(eventSourceId);
var target = new EventHolder
{
Type = typeof(string),
Version = EventSourceVersion.Zero,
Event = string.Empty
};
foreach (var file in files)
{
var json = File.ReadAllText(file);
_serializer.FromJson(target, json);
var @event = _serializer.FromJson(target.Type, json) as IEvent;
stream.Append(new[] { @event });
}
return(stream);
}
public void DoesNotLeakWithPropertyChangedEvent()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = WeakEventListener <EventListener, EventSource, PropertyChangedEventArgs> .SubscribeToWeakPropertyChangedEvent(listener, source, listener.OnPropertyChangedEvent, eventName : "PropertyChanged");
Assert.AreEqual(0, listener.PropertyChangedEventCount);
source.RaisePropertyChangedEvent();
Assert.AreEqual(1, listener.PropertyChangedEventCount);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
public void AutomaticallySubscribesToCollectionChangedWhenEventNameIsNotSpecified()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = WeakEventListener <EventListener, EventSource, NotifyCollectionChangedEventArgs> .SubscribeToWeakCollectionChangedEvent(listener, source, listener.OnCollectionChangedEvent);
Assert.AreEqual(0, listener.CollectionChangedEventCount);
source.RaiseCollectionChangedEvent();
Assert.AreEqual(1, listener.CollectionChangedEventCount);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
public void DoesNotLeakWithAutomaticDetectionOfAllTypesForCollectionChanged()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = listener.SubscribeToWeakCollectionChangedEvent(source, listener.OnCollectionChangedEvent);
Assert.AreEqual(0, listener.CollectionChangedEventCount);
source.RaiseCollectionChangedEvent();
Assert.AreEqual(1, listener.CollectionChangedEventCount);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
public void DoesNotLeakWithAutomaticDetectionOfAllTypes()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = listener.SubscribeToWeakGenericEvent <ViewModelClosedEventArgs>(source, "PublicEvent", listener.OnPublicEvent);
Assert.AreEqual(0, listener.PublicEventCounter);
source.RaisePublicEvent();
Assert.AreEqual(1, listener.PublicEventCounter);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
#pragma warning disable 1591 // Xml Comments
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var eventPath = GetPathFor(eventSource.GetType().Name, eventSourceId);
var files = Directory.GetFiles(eventPath).OrderBy(f => f);
var stream = new CommittedEventStream(eventSourceId);
var target = new EventHolder
{
Type = typeof(string),
Version = EventSourceVersion.Zero,
Event = string.Empty
};
foreach (var file in files)
{
var json = File.ReadAllText(file);
_serializer.FromJson(target, json);
var @event = _serializer.FromJson(target.Type, json) as IEvent;
stream.Append(new[] { @event });
}
return stream;
}
public void DoesNotLeakWithPublicActions()
{
var source = new EventSource();
var listener = new EventListener();
var weakEventListener = WeakEventListener.SubscribeToWeakEvent(listener, source, "PublicEvent", listener.OnPublicAction);
Assert.AreEqual(0, listener.PublicActionCounter);
source.RaisePublicEvent();
Assert.AreEqual(1, listener.PublicActionCounter);
// Some dummy code to make sure the previous listener is removed
listener = new EventListener();
GC.Collect();
var type = listener.GetType();
Assert.IsTrue(weakEventListener.IsSourceAlive);
Assert.IsFalse(weakEventListener.IsTargetAlive);
// Some dummy code to make sure the source stays in memory
source.GetType();
}
private void SendManifestIfNecessary(EventSource eventSource)
{
var eventSourceIdx = EventSourceIndex(eventSource);
if (m_sentManifest.Length <= eventSourceIdx)
{
var newSentManifest = new bool[eventSourceIdx + 4];
Array.Copy(m_sentManifest, newSentManifest, m_sentManifest.Length);
m_sentManifest = newSentManifest;
}
if (m_sentManifest[eventSourceIdx])
{
return;
}
m_sentManifest[eventSourceIdx] = true;
// Get the manifest and send it.
var manifestStr = EventSource.GenerateManifest(eventSource.GetType(), eventSource.Name);
var manifestBytes = System.Text.Encoding.UTF8.GetBytes(manifestStr);
m_relogger.SendManifest(manifestBytes, eventSource);
}
private ICollection<EventSchema> GetEventSchemas(EventSource eventSource)
{
if(eventSource == null)
throw new ArgumentNullException("eventSource");
try
{
var manifest = EventSource.GenerateManifest(
eventSource.GetType(),
Assembly.GetAssembly(eventSource.GetType()).Location
);
this.CheckForBadFormedManifest(manifest);
return new EventSourceSchemaReader().GetSchema(manifest).Values;
}
catch (EventSourceAnalyzerException)
{
throw;
}
catch (Exception e)
{
if (eventSource.ConstructionException != null)
{
throw new EventSourceAnalyzerException(
e.Message,
eventSource.ConstructionException
);
}
throw new EventSourceAnalyzerException(
string.Format(
CultureInfo.CurrentCulture,
Resources.EventSourceAnalyzerManifestGenerationError,
e.Message,
EventSource.GenerateManifest(
eventSource.GetType(),
null
)));
}
}
private MethodInfo GetMethodFromSchema(EventSource source, EventSchema schema)
{
return(source.GetType().GetMethods(Bindings).SingleOrDefault(m => this.IsEvent(m, schema.Id)) ??
source.GetType().GetMethod(schema.TaskName, Bindings));
}
protected override void OnEventSourceCreated(EventSource eventSource)
{
Console.WriteLine("OnEventSourceCreated: {0}", eventSource.GetType().FullName);
}
/// <summary>
/// Return the manifest of a provider for the given type.
/// </summary>
/// <param name="type">The provider type.</param>
/// <returns>The XML manifest content.</returns>
public static string GenerateManifest(Type type)
{
EventSource eventSource = EventSourceImplementer.GetEventSource(type);
return(EventSource.GenerateManifest(eventSource.GetType(), Assembly.GetAssembly(type).Location));
}
/// <summary>
/// Create handler for unknown telemetry that accepts EventData, InstrumentationKey, tags, flags.
/// </summary>
private Action <EventData, string, IDictionary <string, string>, long> CreateHandlerForUnknownTelemetry(EventSource eventSource)
{
var eventSourceType = eventSource.GetType();
// EventSource.Write<T> (String, EventSourceOptions, T)
var writeGenericMethod = eventSourceType.GetMethods(BindingFlags.Instance | BindingFlags.Public)
.Where(m => m.Name == "Write" && m.IsGenericMethod == true)
.Select(m => new { Method = m, Parameters = m.GetParameters() })
.Where(m => m.Parameters.Length == 3 &&
m.Parameters[0].ParameterType.FullName == "System.String" &&
m.Parameters[1].ParameterType.FullName == "System.Diagnostics.Tracing.EventSourceOptions" &&
m.Parameters[2].ParameterType.FullName == null && m.Parameters[2].ParameterType.IsByRef == false)
.Select(m => m.Method)
.SingleOrDefault();
if (writeGenericMethod == null)
{
return(null);
}
var eventSourceOptionsType = eventSourceType.Assembly.GetType("System.Diagnostics.Tracing.EventSourceOptions");
var eventSourceOptionsKeywordsProperty = eventSourceOptionsType.GetProperty("Keywords", BindingFlags.Public | BindingFlags.Instance);
var eventSourceOptions = Activator.CreateInstance(eventSourceOptionsType);
var keywords = Keywords.Events;
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptions, keywords);
var dummyEventData = new EventData();
var writeMethod = writeGenericMethod.MakeGenericMethod(new
{
PartA_iKey = this.dummyPartAiKeyValue,
PartA_Tags = this.dummyPartATagsValue,
PartB_EventData = new
{
// The properties and layout should be the same as EventData_types.cs
dummyEventData.ver,
dummyEventData.name,
dummyEventData.properties,
dummyEventData.measurements,
},
PartA_flags = this.dummyPartAFlagsValue,
}.GetType());
return((data, iKey, tags, flags) =>
{
if (this.EventSourceInternal.IsEnabled(EventLevel.Verbose, keywords))
{
var extendedData = new
{
// The properties and layout should be the same as the anonymous type in the above MakeGenericMethod
PartA_iKey = iKey,
PartA_Tags = tags,
PartB_EventData = new
{
data.ver,
data.name,
data.properties,
data.measurements,
},
PartA_flags = flags,
};
writeMethod.Invoke(eventSource, new object[] { EventTelemetry.TelemetryName, eventSourceOptions, extendedData });
}
});
}
/// <summary>
/// Create a handler for <see cref="ProcessOperationStart(OperationTelemetry)"/> and <see cref="ProcessOperationStop(OperationTelemetry)"/>.
/// </summary>
private Action <OperationTelemetry, EventOpcode> CreateOperationStartStopHandler(EventSource eventSource)
{
var eventSourceType = eventSource.GetType();
// EventSource.Write<T> (String, EventSourceOptions, T)
var writeGenericMethod = eventSourceType.GetMethods(BindingFlags.Instance | BindingFlags.Public)
.Where(m => m.Name == "Write" && m.IsGenericMethod == true)
.Select(m => new { Method = m, Parameters = m.GetParameters() })
.Where(m => m.Parameters.Length == 3 &&
m.Parameters[0].ParameterType.FullName == "System.String" &&
m.Parameters[1].ParameterType.FullName == "System.Diagnostics.Tracing.EventSourceOptions" &&
m.Parameters[2].ParameterType.FullName == null && m.Parameters[2].ParameterType.IsByRef == false)
.Select(m => m.Method)
.SingleOrDefault();
if (writeGenericMethod == null)
{
return(null);
}
var eventSourceOptionsType = eventSourceType.Assembly.GetType("System.Diagnostics.Tracing.EventSourceOptions");
var eventSourceOptionsActivityOptionsProperty = eventSourceOptionsType.GetProperty("ActivityOptions", BindingFlags.Public | BindingFlags.Instance);
var eventSourceOptionsKeywordsProperty = eventSourceOptionsType.GetProperty("Keywords", BindingFlags.Public | BindingFlags.Instance);
var eventSourceOptionsOpcodeProperty = eventSourceOptionsType.GetProperty("Opcode", BindingFlags.Public | BindingFlags.Instance);
var eventSourceOptionsLevelProperty = eventSourceOptionsType.GetProperty("Level", BindingFlags.Public | BindingFlags.Instance);
var eventActivityOptionsType = eventSourceType.Assembly.GetType("System.Diagnostics.Tracing.EventActivityOptions");
var eventActivityOptionsRecursive = Enum.Parse(eventActivityOptionsType, "Recursive");
var eventSourceOptionsStart = Activator.CreateInstance(eventSourceOptionsType);
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptionsStart, Keywords.Operations);
eventSourceOptionsOpcodeProperty.SetValue(eventSourceOptionsStart, EventOpcode.Start);
eventSourceOptionsLevelProperty.SetValue(eventSourceOptionsStart, EventLevel.Informational);
var eventSourceOptionsStop = Activator.CreateInstance(eventSourceOptionsType);
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptionsStop, Keywords.Operations);
eventSourceOptionsOpcodeProperty.SetValue(eventSourceOptionsStop, EventOpcode.Stop);
eventSourceOptionsLevelProperty.SetValue(eventSourceOptionsStop, EventLevel.Informational);
var eventSourceOptionsStartRecursive = Activator.CreateInstance(eventSourceOptionsType);
eventSourceOptionsActivityOptionsProperty.SetValue(eventSourceOptionsStartRecursive, eventActivityOptionsRecursive);
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptionsStartRecursive, Keywords.Operations);
eventSourceOptionsOpcodeProperty.SetValue(eventSourceOptionsStartRecursive, EventOpcode.Start);
eventSourceOptionsLevelProperty.SetValue(eventSourceOptionsStartRecursive, EventLevel.Informational);
var eventSourceOptionsStopRecursive = Activator.CreateInstance(eventSourceOptionsType);
eventSourceOptionsActivityOptionsProperty.SetValue(eventSourceOptionsStartRecursive, eventActivityOptionsRecursive);
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptionsStopRecursive, Keywords.Operations);
eventSourceOptionsOpcodeProperty.SetValue(eventSourceOptionsStopRecursive, EventOpcode.Stop);
eventSourceOptionsLevelProperty.SetValue(eventSourceOptionsStopRecursive, EventLevel.Informational);
var writeMethod = writeGenericMethod.MakeGenericMethod(new
{
IKey = (string)null,
Id = (string)null,
Name = (string)null,
RootId = (string)null,
}.GetType());
return((item, opCode) =>
{
bool isRequest = item is RequestTelemetry;
object eventSourceOptionsObject;
switch (opCode)
{
case EventOpcode.Start:
eventSourceOptionsObject = isRequest ? eventSourceOptionsStart : eventSourceOptionsStartRecursive;
break;
case EventOpcode.Stop:
eventSourceOptionsObject = isRequest ? eventSourceOptionsStop : eventSourceOptionsStopRecursive;
break;
default:
throw new ArgumentException($"Unexpected EventOpcode: {opCode}. Expected: Start or Stop.", nameof(opCode));
}
var extendedData = new
{
IKey = item.Context.InstrumentationKey,
Id = item.Id,
Name = item.Name,
RootId = item.Context.Operation.Id,
};
var parameters = new object[]
{
isRequest?RequestTelemetry.TelemetryName : OperationTelemetry.TelemetryName,
eventSourceOptionsObject,
extendedData,
};
writeMethod.Invoke(this.EventSourceInternal, parameters);
});
}
/// <summary>
/// ctor.
/// </summary>
/// <param name="source">EventSource object to instantiate from.</param>
public EventSourceInfo(EventSource source)
{
this.Source = source;
// DOM+XPath parsing for now, manifests should be very small and we shouldn't be doing this too frequently
string manifestXML = EventSource.GenerateManifest(source.GetType(), "");
var manifest = new XmlDocument();
manifest.LoadXml(manifestXML);
var namespaceMgr = new XmlNamespaceManager(manifest.NameTable);
XmlElement root = manifest.DocumentElement; // instrumentationManifest
namespaceMgr.AddNamespace("win", root.NamespaceURI);
// keep track of event to template mapping (template name can differ from event name)
var templateMapping = new Dictionary <string, EventInfo>(StringComparer.OrdinalIgnoreCase);
// not verifying but we expect a single provider
XmlNode provider = root.SelectSingleNode("//win:provider", namespaceMgr);
this.Name = provider.Attributes["name"].Value;
foreach (XmlNode ev in provider.SelectNodes("//win:events/win:event", namespaceMgr))
{
// EventSource+TraceEvent provide for the following naming scheme:
// - Events with neither a task nor opcode will have a task generated for them automatically.
// - Events with named tasks and the default opcode have the name of the task. It is possible
// as a result to have many events with the same name. We don't hedge against this today since
// we key on ID.
// - Events with opcodes but not task names do not get generated task names, so we simply use
// the event's ID as its name.
int eventID = int.Parse(ev.Attributes["value"].Value);
var taskName = ev.Attributes.GetNamedItem("task");
var opCodeName = ev.Attributes.GetNamedItem("opcode");
string eventName;
if (taskName != null && opCodeName != null)
{
int opCodeOffset = (opCodeName.Value.StartsWith("win:") ? 4 : 0);
eventName = string.Format("{0}/{1}", taskName.Value, opCodeName.Value.Substring(opCodeOffset));
}
else if (taskName != null)
{
eventName = taskName.Value;
}
else
{
eventName = eventID.ToString(CultureInfo.InvariantCulture);
}
var eventData = new EventInfo {
Name = eventName
};
this.eventIDs[eventID] = eventData;
if (ev.Attributes.GetNamedItem("template") != null)
{
templateMapping[ev.Attributes["template"].Value] = eventData;
}
}
// Each template has one or more 'data' tags whose attributes are the name of the argument and its
// type. Since we only care about the name we ignore the type. For array arguments EventSource emits
// two entries in the template, first a <foo>.Length entry specifying the length of the array,
// followed by the actual array data itself (<foo>). Since we're constructing this data only
// for handling intra-application EventSource calls we don't need to care about the .Length
// bit that comes in the manifest since it is specific to decoding ETW events.
foreach (XmlNode template in provider.SelectNodes("//win:templates/win:template", namespaceMgr))
{
string name = template.Attributes["tid"].Value;
// we want to throw right away if we somehow got a template for an unnamed event, that's a big
// contract breach.
EventInfo data = templateMapping[name];
XmlNodeList arguments = template.SelectNodes("win:data", namespaceMgr);
int numArgs = 0;
data.Arguments = new string[arguments.Count];
for (int i = 0; i < arguments.Count; ++i)
{
XmlNode node = arguments[i];
string dataName = node.Attributes["name"].Value;
if (!dataName.EndsWith(ArrayLengthArgumentSuffix, StringComparison.OrdinalIgnoreCase))
{
data.Arguments[numArgs] = dataName;
++numArgs;
}
}
}
}
public EventSourceVersion GetLastCommittedVersion(EventSource eventSource, Guid eventSourceId)
{
var eventPath = GetPathFor(eventSource.GetType().Name, eventSourceId);
var first = Directory.GetFiles(eventPath).OrderByDescending(f => f).FirstOrDefault();
if (first == null) return EventSourceVersion.Zero;
var json = File.ReadAllText(first);
var target = new EventHolder
{
Type = typeof(string),
Version = EventSourceVersion.Zero,
Event = string.Empty
};
_serializer.FromJson(target, json);
return target.Version;
}
/// <summary>
/// Gets the schema for the specified event source.
/// </summary>
/// <param name="eventSource">The event source.</param>
/// <returns>The event schema.</returns>
public IDictionary<int, EventSchema> GetSchema(EventSource eventSource)
{
Guard.ArgumentNotNull(eventSource, "eventSource");
return this.GetSchema(EventSource.GenerateManifest(eventSource.GetType(), null));
}
private ICollection<EventSchema> GetEventSchemas(EventSource eventSource)
{
try
{
string manifest = EventSource.GenerateManifest(eventSource.GetType(), null);
this.CheckForBadFormedManifest(manifest);
return new EventSourceSchemaReader().GetSchema(manifest).Values;
}
catch (EventSourceAnalyzerException)
{
throw;
}
catch (Exception e)
{
throw new EventSourceAnalyzerException(string.Format(CultureInfo.CurrentCulture, Properties.Resources.EventSourceAnalyzerManifestGenerationError, e.Message, EventSource.GenerateManifest(eventSource.GetType(), null)));
}
}
private MethodInfo GetMethodFromSchema(EventSource source, EventSchema schema)
{
return source.GetType().GetMethods(Bindings).SingleOrDefault(m => this.IsEvent(m, schema.Id)) ??
source.GetType().GetMethod(schema.TaskName, Bindings);
}
