/// <summary>
/// Repeated LogEvent detected. Checks if it should activate filter-action
/// </summary>
FilterResult RefreshFilterInfo(LogEventInfo logEvent, FilterInfo filterInfo)
{
if (filterInfo.HasExpired(logEvent.TimeStamp, TimeoutSeconds) || logEvent.Level.Ordinal > filterInfo.LogLevel.Ordinal)
{
int filterCount = filterInfo.FilterCount;
if (filterCount > 0 && filterInfo.IsObsolete(logEvent.TimeStamp, TimeoutSeconds))
{
filterCount = 0;
}
filterInfo.Refresh(logEvent.Level, logEvent.TimeStamp, 0);
if (filterCount > 0)
{
if (!string.IsNullOrEmpty(FilterCountPropertyName))
{
object otherFilterCount;
if (!logEvent.Properties.TryGetValue(FilterCountPropertyName, out otherFilterCount))
{
logEvent.Properties[FilterCountPropertyName] = filterCount;
}
else if (otherFilterCount is int)
{
filterCount = Math.Max((int)otherFilterCount, filterCount);
logEvent.Properties[FilterCountPropertyName] = filterCount;
}
}
if (!string.IsNullOrEmpty(FilterCountMessageAppendFormat))
{
if (logEvent.Message != null)
{
logEvent.Message += string.Format(FilterCountMessageAppendFormat, filterCount.ToString(System.Globalization.CultureInfo.InvariantCulture));
}
}
}
return(FilterResult.Neutral);
}
else
{
filterInfo.Refresh(logEvent.Level, logEvent.TimeStamp, filterInfo.FilterCount + 1);
return(Action);
}
}
/// <summary>
/// Checks whether log event should be logged or not. In case the LogEvent has just been repeated.
/// </summary>
/// <param name="logEvent">Log event.</param>
/// <returns>
/// <see cref="FilterResult.Ignore"/> - if the log event should be ignored<br/>
/// <see cref="FilterResult.Neutral"/> - if the filter doesn't want to decide<br/>
/// <see cref="FilterResult.Log"/> - if the log event should be logged<br/>
/// .</returns>
protected override FilterResult Check(LogEventInfo logEvent)
{
lock (_repeatFilter)
{
using (var targetBuilder = OptimizeBufferReuse ? ReusableLayoutBuilder.Allocate() : ReusableLayoutBuilder.None)
{
if (OptimizeBufferReuse && targetBuilder.Result.Capacity != OptimizeBufferDefaultLength)
{
// StringBuilder.Equals only works when StringBuilder.Capacity is the same
if (OptimizeBufferDefaultLength < MaxInitialRenderBufferLength)
{
OptimizeBufferDefaultLength = MaxLength;
while (OptimizeBufferDefaultLength < targetBuilder.Result.Capacity && OptimizeBufferDefaultLength < MaxInitialRenderBufferLength)
{
OptimizeBufferDefaultLength *= 2;
}
}
targetBuilder.Result.Capacity = OptimizeBufferDefaultLength;
}
FilterInfoKey filterInfoKey = RenderFilterInfoKey(logEvent, OptimizeBufferReuse ? targetBuilder.Result : null);
FilterInfo filterInfo = null;
if (_repeatFilter.TryGetValue(filterInfoKey, out filterInfo))
{
return(RefreshFilterInfo(logEvent, filterInfo));
}
filterInfo = CreateFilterInfo(logEvent);
if (OptimizeBufferReuse && filterInfo.StringBuffer != null)
{
filterInfo.StringBuffer.ClearBuilder();
int length = Math.Min(targetBuilder.Result.Length, MaxLength);
for (int i = 0; i < length; ++i)
{
filterInfo.StringBuffer.Append(targetBuilder.Result[i]);
}
}
filterInfo.Refresh(logEvent.Level, logEvent.TimeStamp, 0);
_repeatFilter.Add(new FilterInfoKey(filterInfo.StringBuffer, filterInfoKey.StringValue, filterInfoKey.StringHashCode), filterInfo);
}
}
return(FilterResult.Neutral);
}
