/// <summary>
/// Emit the provided log event to the sink.
/// </summary>
/// <param name="logEvent">The log event to write.</param>
/// <remarks>
/// <see cref="LogEventLevel.Debug" />, <see cref="LogEventLevel.Information" /> and <see cref="LogEventLevel.Verbose" /> are registered as <see cref="EventLogEntryType.Information" />.
/// <see cref="LogEventLevel.Error" />, <see cref="LogEventLevel.Fatal" /> are registered as <see cref="EventLogEntryType.Error" />.
/// <see cref="LogEventLevel.Warning" /> are registered as <see cref="EventLogEntryType.Warning" />.
/// The Event ID in the Windows log will be set to the integer value of the <paramref name="logEvent"/>'s <see cref="LogEvent.Level"/> property, so that the log can be filtered with more granularity.</remarks>
public void Emit(LogEvent logEvent)
{
if (logEvent == null)
{
throw new ArgumentNullException("logEvent");
}
EventLogEntryType type;
switch (logEvent.Level)
{
case LogEventLevel.Debug:
case LogEventLevel.Information:
case LogEventLevel.Verbose:
type = EventLogEntryType.Information;
break;
case LogEventLevel.Error:
case LogEventLevel.Fatal:
type = EventLogEntryType.Error;
break;
case LogEventLevel.Warning:
type = EventLogEntryType.Warning;
break;
default:
SelfLog.WriteLine("Unexpected logging level, writing to EventLog as Information");
type = EventLogEntryType.Information;
break;
}
var payloadWriter = new StringWriter();
_textFormatter.Format(logEvent, payloadWriter);
//The payload is limitted in length and allowed chars
//see: https://msdn.microsoft.com/en-us/library/e29k5ebc%28v=vs.110%29.aspx
var payload = payloadWriter.ToString();
if (payload.Length > 31839)
{
//trim
payload = payload.Substring(0, 31839);
}
_log.WriteEntry(
message: payload,
type: type,
//even though the api is type int, eventID must be between 0 and 65535
//https://msdn.microsoft.com/en-us/library/d3159s0c(v=vs.110).aspx
eventID: (ushort)(EventIdHash.Compute(logEvent.MessageTemplate.Text)));
}
/// <summary>
/// Emit the provided log event to the sink.
/// </summary>
/// <param name="logEvent">The log event to write.</param>
/// <remarks>
/// <see cref="LogEventLevel.Debug" />, <see cref="LogEventLevel.Information" /> and <see cref="LogEventLevel.Verbose" /> are registered as <see cref="EventLogEntryType.Information" />.
/// <see cref="LogEventLevel.Error" />, <see cref="LogEventLevel.Fatal" /> are registered as <see cref="EventLogEntryType.Error" />.
/// <see cref="LogEventLevel.Warning" /> are registered as <see cref="EventLogEntryType.Warning" />.
/// The Event ID in the Windows log will be set to the integer value of the <paramref name="logEvent"/>'s <see cref="LogEvent.Level"/> property, so that the log can be filtered with more granularity.</remarks>
public void Emit(LogEvent logEvent)
{
if (logEvent == null)
{
throw new ArgumentNullException(nameof(logEvent));
}
var type = LevelToEventLogEntryType(logEvent.Level);
var payloadWriter = new StringWriter();
_textFormatter.Format(logEvent, payloadWriter);
// The payload is limited in length and allowed chars, see: https://msdn.microsoft.com/en-us/library/e29k5ebc%28v=vs.110%29.aspx
var payload = payloadWriter.ToString();
if (payload.Length > MaximumPayloadLengthChars)
{
SelfLog.WriteLine("Trimming long event log entry payload to {0} characters", MaximumPayloadLengthChars);
payload = payload.Substring(0, MaximumPayloadLengthChars);
}
_log.WriteEntry(payload, type, EventIdHash.Compute(logEvent.MessageTemplate.Text));
}