protected virtual void CallAppenders()

in src/log4net/Repository/Hierarchy/Logger.cs [556:618]
48 lines of code
10 McCabe index (conditional complexity)

		protected virtual void CallAppenders(LoggingEvent loggingEvent) 
		{
			if (loggingEvent == null)
			{
				throw new ArgumentNullException("loggingEvent");
			}

			int writes = 0;

			for(Logger c=this; c != null; c=c.m_parent) 
			{
				if (c.m_appenderAttachedImpl != null) 
				{
					// Protected against simultaneous call to addAppender, removeAppender,...
					c.m_appenderLock.AcquireReaderLock();
					try
					{
						if (c.m_appenderAttachedImpl != null) 
						{
							writes += c.m_appenderAttachedImpl.AppendLoopOnAppenders(loggingEvent);
						}
					}
					finally
					{
						c.m_appenderLock.ReleaseReaderLock();
					}
				}

				if (!c.m_additive) 
				{
					break;
				}
			}
			
			// No appenders in hierarchy, warn user only once.
			//
			// Note that by including the AppDomain values for the currently running
			// thread, it becomes much easier to see which application the warning
			// is from, which is especially helpful in a multi-AppDomain environment
			// (like IIS with multiple VDIRS).  Without this, it can be difficult
			// or impossible to determine which .config file is missing appender
			// definitions.
			//
			if (!m_hierarchy.EmittedNoAppenderWarning && writes == 0) 
			{
				m_hierarchy.EmittedNoAppenderWarning = true;
				LogLog.Debug(declaringType, "No appenders could be found for logger [" + Name + "] repository [" + Repository.Name + "]");
				LogLog.Debug(declaringType, "Please initialize the log4net system properly.");
				try
				{
					LogLog.Debug(declaringType, "    Current AppDomain context information: ");
					LogLog.Debug(declaringType, "       BaseDirectory   : " + SystemInfo.ApplicationBaseDirectory);
#if !NETCF && !NETSTANDARD1_3
					LogLog.Debug(declaringType, "       FriendlyName    : " + AppDomain.CurrentDomain.FriendlyName);
					LogLog.Debug(declaringType, "       DynamicDirectory: " + AppDomain.CurrentDomain.DynamicDirectory);
#endif
				}
				catch(System.Security.SecurityException)
				{
					// Insufficient permissions to display info from the AppDomain
				}
			}
		}