public void Log <TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func <TState, Exception, string> formatter)
{
LogMessage logMessage = new LogMessage
{
Level = logLevel,
EventId = eventId,
State = state as IEnumerable <KeyValuePair <string, object> >,
Scope = _scopeProvider.GetScopeDictionaryOrNull(),
Exception = exception,
FormattedMessage = formatter(state, exception),
Category = Category,
Timestamp = DateTime.UtcNow
};
lock (_syncLock)
{
_logMessages.Add(logMessage);
}
}
public void Log <TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func <TState, Exception, string> formatter)
{
if (!IsEnabled(logLevel))
{
return;
}
// Make sure we have something to log
string formattedMessage = formatter?.Invoke(state, exception);
if (string.IsNullOrEmpty(formattedMessage) && exception == null)
{
return;
}
(string exceptionType, string exceptionMessage, string exceptionDetails) = exception.GetExceptionDetails();
if (exception != null)
{
formattedMessage = Sanitizer.Sanitize(formattedMessage);
}
// enumerate all the state values once, capturing the values we'll use below
// last one wins
string stateFunctionName = null;
if (state is IEnumerable <KeyValuePair <string, object> > stateProps)
{
foreach (var kvp in stateProps)
{
if (Utility.IsFunctionName(kvp))
{
stateFunctionName = kvp.Value?.ToString();
}
}
}
var scopeProps = _scopeProvider.GetScopeDictionaryOrNull();
string functionName = stateFunctionName;
if (string.IsNullOrEmpty(functionName))
{
if (Utility.TryGetFunctionName(scopeProps, out string scopeFunctionName))
{
functionName = scopeFunctionName;
}
}
// Build up a JSON string for the Azure Monitor 'properties' bag
StringWriter sw = new StringWriter();
using (JsonTextWriter writer = new JsonTextWriter(sw)
{
Formatting = Formatting.None
})
{
writer.WriteStartObject();
WritePropertyIfNotNull(writer, "appName", _appServiceOptions.CurrentValue.AppName);
WritePropertyIfNotNull(writer, "roleInstance", _roleInstance);
WritePropertyIfNotNull(writer, "message", formattedMessage);
WritePropertyIfNotNull(writer, "category", _category);
WritePropertyIfNotNull(writer, "hostVersion", _hostVersion);
WritePropertyIfNotNull(writer, "functionInvocationId", Utility.GetValueFromScope(scopeProps, ScopeKeys.FunctionInvocationId));
WritePropertyIfNotNull(writer, "functionName", functionName);
WritePropertyIfNotNull(writer, "hostInstanceId", _hostInstanceId);
WritePropertyIfNotNull(writer, "activityId", Utility.GetValueFromScope(scopeProps, ScriptConstants.LogPropertyActivityIdKey));
WritePropertyIfNotNull(writer, "level", logLevel.ToString());
WritePropertyIfNotNull(writer, "levelId", (int)logLevel);
WritePropertyIfNotNull(writer, "processId", _processId);
WritePropertyIfNotNull(writer, nameof(exceptionDetails), exceptionDetails);
WritePropertyIfNotNull(writer, nameof(exceptionMessage), exceptionMessage);
WritePropertyIfNotNull(writer, nameof(exceptionType), exceptionType);
// Only write the event if it's relevant
if (eventId.Id != 0 || !string.IsNullOrEmpty(eventId.Name))
{
WriteProperty(writer, "eventId", eventId.Id);
WriteProperty(writer, "eventName", eventId.Name);
}
writer.WriteEndObject();
}
_eventGenerator.LogAzureMonitorDiagnosticLogEvent(logLevel, _hostNameProvider.Value, AzureMonitorOperationName, AzureMonitorCategoryName, _regionName, sw.ToString());
}
public void Log <TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func <TState, Exception, string> formatter)
{
if (!IsEnabled(logLevel) || _isUserFunction)
{
return;
}
// enumerate all the state values once, capturing the values we'll use below
// last one wins
string stateSourceValue = null;
string stateFunctionName = null;
string stateEventName = null;
string stateActivityId = null;
if (state is IEnumerable <KeyValuePair <string, object> > stateProps)
{
foreach (var kvp in stateProps)
{
if (string.Equals(kvp.Key, ScriptConstants.LogPropertySourceKey, StringComparison.OrdinalIgnoreCase))
{
stateSourceValue = kvp.Value?.ToString();
}
else if (string.Equals(kvp.Key, ScriptConstants.LogPropertyIsUserLogKey, StringComparison.OrdinalIgnoreCase))
{
if ((bool)kvp.Value)
{
return;
}
}
else if (Utility.IsFunctionName(kvp))
{
stateFunctionName = kvp.Value?.ToString();
}
else if (string.Equals(kvp.Key, ScriptConstants.LogPropertyEventNameKey, StringComparison.OrdinalIgnoreCase))
{
stateEventName = kvp.Value?.ToString();
}
else if (string.Equals(kvp.Key, ScriptConstants.LogPropertyActivityIdKey, StringComparison.OrdinalIgnoreCase))
{
stateActivityId = kvp.Value?.ToString();
}
}
}
// propagate special exceptions through the EventManager
string source = _categoryName ?? stateSourceValue;
if (exception is FunctionIndexingException && _eventManager != null)
{
_eventManager.Publish(new FunctionIndexingEvent(nameof(FunctionIndexingException), source, exception));
}
// If we don't have a message, there's nothing to log.
string formattedMessage = formatter?.Invoke(state, exception);
if (string.IsNullOrEmpty(formattedMessage))
{
return;
}
var scopeProps = _scopeProvider.GetScopeDictionaryOrNull();
string functionName = _functionName ?? stateFunctionName ?? string.Empty;
if (string.IsNullOrEmpty(functionName) && scopeProps?.Count > 0)
{
if (Utility.TryGetFunctionName(scopeProps, out string scopeFunctionName))
{
functionName = scopeFunctionName;
}
}
string invocationId = string.Empty;
object scopeValue = null;
if (scopeProps != null && scopeProps.TryGetValue(ScriptConstants.LogPropertyFunctionInvocationIdKey, out scopeValue) && scopeValue != null)
{
invocationId = scopeValue.ToString();
}
// Apply standard event properties
// Note: we must be sure to default any null values to empty string
// otherwise the ETW event will fail to be persisted (silently)
string summary = formattedMessage ?? string.Empty;
string eventName = !string.IsNullOrEmpty(eventId.Name) ? eventId.Name : stateEventName ?? string.Empty;
string activityId = stateActivityId ?? string.Empty;
string subscriptionId = _appServiceOptions.CurrentValue.SubscriptionId ?? string.Empty;
string appName = _appServiceOptions.CurrentValue.AppName ?? string.Empty;
string runtimeSiteName = _appServiceOptions.CurrentValue.RuntimeSiteName ?? string.Empty;
string slotName = _appServiceOptions.CurrentValue.SlotName ?? string.Empty;
string innerExceptionType = string.Empty;
string innerExceptionMessage = string.Empty;
string details = string.Empty;
if (exception != null)
{
// Populate details from the exception.
if (string.IsNullOrEmpty(functionName) && exception is FunctionInvocationException fex)
{
functionName = string.IsNullOrEmpty(fex.MethodName) ? string.Empty : fex.MethodName.Replace("Host.Functions.", string.Empty);
}
(innerExceptionType, innerExceptionMessage, details) = exception.GetExceptionDetails();
formattedMessage = Sanitizer.Sanitize(formattedMessage);
innerExceptionMessage = innerExceptionMessage ?? string.Empty;
}
_eventGenerator.LogFunctionTraceEvent(logLevel, subscriptionId, appName, functionName, eventName, source, details, summary, innerExceptionType, innerExceptionMessage, invocationId, _hostInstanceId, activityId, runtimeSiteName, slotName, DateTime.UtcNow);
}