public virtual void FormatDate()

in src/log4net/DateFormatter/AbsoluteTimeDateFormatter.cs [102:169]
46 lines of code
6 McCabe index (conditional complexity)

		public virtual void FormatDate(DateTime dateToFormat, TextWriter writer)
		{
                    lock (s_lastTimeStrings)
		    {
			// Calculate the current time precise only to the second
			long currentTimeToTheSecond = (dateToFormat.Ticks - (dateToFormat.Ticks % TimeSpan.TicksPerSecond));

                        string timeString = null;
			// Compare this time with the stored last time
			// If we are in the same second then append
			// the previously calculated time string
                        if (s_lastTimeToTheSecond != currentTimeToTheSecond)
                        {
                            s_lastTimeStrings.Clear();
                        }
                        else
                        {
                            timeString = (string) s_lastTimeStrings[GetType()];
                        }

                        if (timeString == null)
                        {
				// lock so that only one thread can use the buffer and
				// update the s_lastTimeToTheSecond and s_lastTimeStrings

				// PERF: Try removing this lock and using a new StringBuilder each time
				lock(s_lastTimeBuf)
				{
                                        timeString = (string) s_lastTimeStrings[GetType()];

                                        if (timeString == null)
                                        {
						// We are in a new second.
						s_lastTimeBuf.Length = 0;

						// Calculate the new string for this second
						FormatDateWithoutMillis(dateToFormat, s_lastTimeBuf);

						// Render the string buffer to a string
                                                timeString = s_lastTimeBuf.ToString();

#if NET_1_1
						// Ensure that the above string is written into the variable NOW on all threads.
						// This is only required on multiprocessor machines with weak memeory models
						System.Threading.Thread.MemoryBarrier();
#endif
						// Store the time as a string (we only have to do this once per second)
                                                s_lastTimeStrings[GetType()] = timeString;
						s_lastTimeToTheSecond = currentTimeToTheSecond;
					}
				}
			}
			writer.Write(timeString);
	
			// Append the current millisecond info
			writer.Write(',');
			int millis = dateToFormat.Millisecond;
			if (millis < 100) 
			{
				writer.Write('0');
			}
			if (millis < 10) 
			{
				writer.Write('0');
			}
			writer.Write(millis);
                    }
		}