/// <summary>
/// Writes a log entry.
/// </summary>
/// <typeparam name="TState">State being passed along.</typeparam>
/// <param name="logLevel">Entry will be written on this level.</param>
/// <param name="eventId">Id of the event.</param>
/// <param name="state">The entry to be written. Can be also an object.</param>
/// <param name="exception">The exception related to this entry.</param>
/// <param name="formatter">Function to create a <c>string</c> message of the <paramref name="state" /> and <paramref name="exception" />.</param>
public void Log <TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func <TState, Exception, string> formatter)
{
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
if (this.IsEnabled(logLevel))
{
if (exception == null)
{
if (this.applicationInsightsLoggerOptions.UseCustomEvents)
{
var eventRecord = new EventTelemetryRecord(
formatter(state, null));
this.PopulateTelemetry(eventRecord, state, eventId);
this.telemetryClient.TrackEvent(eventRecord);
return;
}
var record = new TraceTelemetryRecord(
formatter(state, exception),
logLevel);
this.PopulateTelemetry(record, state, eventId);
if (exception != null)
{
record.Properties.Add("ExceptionMessage", exception.Message);
}
this.telemetryClient.TrackTrace(record);
return;
}
var exceptionTelemetry = new ExceptionTelemetryRecord(exception)
{
Message = exception.Message,
SeverityLevel = logLevel,
};
exceptionTelemetry.Properties.Add("FormattedMessage", formatter(state, exception));
this.PopulateTelemetry(exceptionTelemetry, state, eventId);
this.telemetryClient.TrackException(exceptionTelemetry);
}
}
/// <summary>
/// Send a trace.
/// </summary>
/// <param name="traceTelemetry">The trace record.</param>
public void TrackTrace(TraceTelemetryRecord traceTelemetry)
{
if (traceTelemetry is null)
{
throw new ArgumentNullException(nameof(traceTelemetry));
}
var t = new TraceTelemetry(
traceTelemetry.Message,
this.GetSeverityLevel(traceTelemetry.SeverityLevel));
foreach (var k in traceTelemetry.Properties.Keys)
{
t.Properties.Add(k, traceTelemetry.Properties[k]);
}
t.Timestamp = traceTelemetry.Timestamp;
t.Sequence = traceTelemetry.Sequence;
this.client.TrackTrace(t);
}