/// <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;
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);
}
/// <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)
{
FilterResult filterResult = FilterResult.Neutral;
bool obsoleteFilter = false;
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;
if (!_repeatFilter.TryGetValue(filterInfoKey, out 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);
obsoleteFilter = true;
}
else
{
if (IncludeFirst)
{
obsoleteFilter = filterInfo.IsObsolete(logEvent.TimeStamp, TimeoutSeconds);
}
filterResult = RefreshFilterInfo(logEvent, filterInfo);
}
}
}
// Ignore the first log-event, and wait until next timeout expiry
if (IncludeFirst && obsoleteFilter)
{
filterResult = Action;
}
return(filterResult);
}
