public abstract class BufferingAppenderSkeleton : AppenderSkeleton

Public MustInherit Class BufferingAppenderSkeleton
	Inherits AppenderSkeleton

public ref class BufferingAppenderSkeleton abstract : public AppenderSkeleton

[<AbstractClassAttribute>]
type BufferingAppenderSkeleton =  
    class
        inherit AppenderSkeleton
    end

The BufferingAppenderSkeleton type exposes the following members.

	Name	Description
	BufferingAppenderSkeleton	Initializes a new instance of the BufferingAppenderSkeleton class.
	BufferingAppenderSkeleton(Boolean)	Initializes a new instance of the BufferingAppenderSkeleton class.

	Name	Description
	BufferSize	Gets or sets the size of the cyclic buffer used to hold the logging events.
	ErrorHandler	Gets or sets the IErrorHandler for this appender. (Inherited from AppenderSkeleton.)
	Evaluator	Gets or sets the ITriggeringEventEvaluator that causes the buffer to be sent immediately.
	FilterHead	The filter chain. (Inherited from AppenderSkeleton.)
	Fix	Gets or sets a the fields that will be fixed in the event
	Layout	Gets or sets the ILayout for this appender. (Inherited from AppenderSkeleton.)
	Lossy	Gets or sets a value that indicates whether the appender is lossy.
	LossyEvaluator	Gets or sets the value of the ITriggeringEventEvaluator to use.
	Name	Gets or sets the name of this appender. (Inherited from AppenderSkeleton.)
	OnlyFixPartialEventData	Obsolete. Gets or sets a value indicating if only part of the logging event data should be fixed.
	RequiresLayout	Tests if this appender requires a Layout to be set. (Inherited from AppenderSkeleton.)
	Threshold	Gets or sets the threshold Level of this appender. (Inherited from AppenderSkeleton.)

	Name	Description
	ActivateOptions	Initialize the appender based on the options set (Overrides AppenderSkeletonActivateOptions.)
	AddFilter	Adds a filter to the end of the filter chain. (Inherited from AppenderSkeleton.)
	Append(LoggingEvent)	Append a bulk array of logging events. (Inherited from AppenderSkeleton.)
	Append(LoggingEvent)	This method is called by the DoAppend(LoggingEvent) method. (Overrides AppenderSkeletonAppend(LoggingEvent).)
	ClearFilters	Clears the filter list for this appender. (Inherited from AppenderSkeleton.)
	Close	Closes the appender and release resources. (Inherited from AppenderSkeleton.)
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent)] method. (Inherited from AppenderSkeleton.)
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent[])] method. (Inherited from AppenderSkeleton.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	FilterEvent	Test if the logging event should we output by this appender (Inherited from AppenderSkeleton.)
	Finalize	Finalizes this appender by calling the implementation's Close method. (Inherited from AppenderSkeleton.)
	Flush	Flush the currently buffered events
	Flush(Boolean)	Flush the currently buffered events
	Flush(Int32)	Flushes any buffered log data. (Overrides AppenderSkeletonFlush(Int32).)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsAsSevereAsThreshold	Checks if the message level is below this appender's threshold. (Inherited from AppenderSkeleton.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnClose	Close this appender instance. (Overrides AppenderSkeletonOnClose.)
	PreAppendCheck	Called before [M:Append(LoggingEvent)] as a precondition. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(TextWriter, LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	SendBuffer	Sends the events.
	SendFromBuffer	Sends the contents of the buffer.
	ToString	Returns a String that represents the current Object. (Inherited from Object.)

This base class should be used by appenders that need to buffer a number of events before logging them. For example the AdoNetAppender buffers events and then submits the entire contents of the buffer to the underlying database in one go.

Subclasses should override the [M:SendBuffer(LoggingEvent[])] method to deliver the buffered events.

The BufferingAppenderSkeleton maintains a fixed size cyclic buffer of events. The size of the buffer is set using the BufferSize property.

A ITriggeringEventEvaluator is used to inspect each event as it arrives in the appender. If the Evaluator triggers, then the current buffer is sent immediately (see [M:SendBuffer(LoggingEvent[])]). Otherwise the event is stored in the buffer. For example, an evaluator can be used to deliver the events immediately when an ERROR event arrives.

The buffering appender can be configured in a Lossy mode. By default the appender is NOT lossy. When the buffer is full all the buffered events are sent with [M:SendBuffer(LoggingEvent[])]. If the Lossy property is set to true then the buffer will not be sent when it is full, and new events arriving in the appender will overwrite the oldest event in the buffer. In lossy mode the buffer will only be sent when the Evaluator triggers. This can be useful behavior when you need to know about ERROR events but not about events with a lower level, configure an evaluator that will trigger when an ERROR event arrives, the whole buffer will be sent which gives a history of events leading up to the ERROR event.

Reference