public virtual void Flush()

in src/log4net/Appender/BufferingAppenderSkeleton.cs [314:362]
39 lines of code
9 McCabe index (conditional complexity)

		public virtual void Flush(bool flushLossyBuffer)
		{
			// This method will be called outside of the AppenderSkeleton DoAppend() method
			// therefore it needs to be protected by its own lock. This will block any
			// Appends while the buffer is flushed.
			lock(this)
			{
				if (m_cb != null && m_cb.Length > 0)
				{
					if (m_lossy)
					{
						// If we are allowed to eagerly flush from the lossy buffer
						if (flushLossyBuffer)
						{
							if (m_lossyEvaluator != null)
							{
								// Test the contents of the buffer against the lossy evaluator
								LoggingEvent[] bufferedEvents = m_cb.PopAll();
								ArrayList filteredEvents = new ArrayList(bufferedEvents.Length);

								foreach(LoggingEvent loggingEvent in bufferedEvents)
								{
									if (m_lossyEvaluator.IsTriggeringEvent(loggingEvent))
									{
										filteredEvents.Add(loggingEvent);
									}
								}

								// Send the events that meet the lossy evaluator criteria
								if (filteredEvents.Count > 0)
								{
									SendBuffer((LoggingEvent[])filteredEvents.ToArray(typeof(LoggingEvent)));
								}
							}
							else
							{
								// No lossy evaluator, all buffered events are discarded
								m_cb.Clear();
							}
						}
					}
					else
					{
						// Not lossy, send whole buffer
						SendFromBuffer(null, m_cb);
					}
				}
			}
		}