private static LayoutRenderer ConvertToLiteral(LayoutRenderer renderer)
{
StringBuilder sb = new StringBuilder();
renderer.Append(sb, LogEventInfo.CreateNullEvent());
return(new LiteralLayoutRenderer(sb.ToString()));
}
/// <summary>
/// Renders the layout for the specified logging event by invoking layout renderers
/// that make up the event.
/// </summary>
/// <param name="logEvent">The logging event.</param>
/// <returns>The rendered layout.</returns>
public string GetFormattedMessage(LogEventInfo logEvent)
{
if (_fixedText != null)
{
return(_fixedText);
}
string cachedValue = logEvent.GetCachedLayoutValue(this);
if (cachedValue != null)
{
return(cachedValue);
}
int size = 0;
for (int i = 0; i < _renderers.Length; ++i)
{
LayoutRenderer app = _renderers[i];
try
{
int ebs = app.GetEstimatedBufferSize(logEvent);
size += ebs;
}
catch (Exception ex)
{
if (InternalLogger.IsWarnEnabled)
{
InternalLogger.Warn("Exception in {0}.GetEstimatedBufferSize(): {1}.", app.GetType().FullName, ex);
}
}
}
StringBuilder builder = new StringBuilder(size);
for (int i = 0; i < _renderers.Length; ++i)
{
LayoutRenderer app = _renderers[i];
try
{
app.Append(builder, logEvent);
}
catch (Exception ex)
{
if (InternalLogger.IsWarnEnabled)
{
InternalLogger.Warn("Exception in {0}.Append(): {1}.", app.GetType().FullName, ex);
}
}
}
string value = builder.ToString();
logEvent.AddCachedLayoutValue(this, value);
return(value);
}