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WPF Control Factory

, 20 Apr 2010 CPOL
This article explains some advantages and disadvantages of factories, and shows one to use for generating WPF Controls.
WpfControlsAndSample
Pfz.ClassLibraries
Pfz
Caching
Collections
DataTypes
Extensions
Pfz.snk
Properties
Ranges
Threading
Pfz.WpfControls
BoundGridParts
Extensions
Pfz.WpfControls.snk
Properties
TypeConverters
WpfControlFactorySample
bin
Debug
Pfz.dll
Pfz.WpfControls.dll
WpfControlFactorySample.exe
Properties
WpfControlFactorySample.suo
using System;
using System.Diagnostics;
using System.IO;

namespace Pfz.Threading
{
	/// <summary>
	/// This class only configures what to do when a dead-lock occurs while
	/// acquiring a lock with PfzMonitorLockExtensions or with 
	/// PfzReaderWriterLockExtensions.
	/// </summary>
	public static class LockConfiguration
	{
		#region LockType enum
			/// <summary>
			/// Enum used to identify which type of lock has dead-locked when
			/// invoking DeadLocked event.
			/// </summary>
			public enum LockType
			{
				/// <summary>
				/// A monitor lock has dead-locked. (LockWithTimeout method).
				/// </summary>
				Monitor,
				
				/// <summary>
				/// A read-lock has dead-locked.
				/// </summary>
				Read,
				
				/// <summary>
				/// An upgradeable-read-lock has dead-locked.
				/// </summary>
				Upgradeable,
				
				/// <summary>
				/// A write-lock has dead-locked.
				/// </summary>
				Write
			}
		#endregion
		#region TimedOutEventArgs
			/// <summary>
			/// Class used as argument of the TimedOut event.
			/// </summary>
			[Serializable]
			public sealed class TimedOutEventArgs:
				EventArgs
			{
				internal TimedOutEventArgs(LockType lockType)
				{
					LockType = lockType;
				}
				
				/// <summary>
				/// The LockType that caused the timeout.
				/// </summary>
				public LockType LockType { get; private set; }
			}
		#endregion
		#region TimedOut event
			/// <summary>
			/// This event is invoked when any of the Locking extensions
			/// times-out (probably by a dead-lock).
			/// </summary>
			public static event EventHandler<TimedOutEventArgs> TimedOut;
		#endregion
		
		#region DefaultLockTimeout
			private static TimeSpan fDefaultLockTimeout = new TimeSpan(0, 1, 0);
			
			/// <summary>
			/// Gets or sets the default timeout for LockWithTimeout method.
			/// </summary>
			public static TimeSpan DefaultLockTimeout
			{
				get
				{
					return fDefaultLockTimeout;
				}
				set
				{
					if (value < TimeSpan.Zero)
						throw new ArgumentException("DefaultLockTimeout must be greater or equal to zero.");
						
					fDefaultLockTimeout = value;
				}
			}
		#endregion
		#region LockTimedOutLogPath
			private static string fLockTimedOutLogPath = "C:\\Temp\\PfzLockExtensions_TimedOut\\";
			
			/// <summary>
			/// Gets or sets a directory path in with log files will be generated when/if
			/// LockWithTimeout times out.
			/// </summary>
			public static string LockTimedOutLogPath
			{
				get
				{
					return fLockTimedOutLogPath;
				}
				set
				{
					if (value != null)
					{
						if (value == "")
							throw new ArgumentException("LockTimedOutLogPath can't be an empty string.");
							
						if (value[value.Length-1] != '\\')
							value += '\\';
					}
					
					fLockTimedOutLogPath = value;
				}
			}
		#endregion
		
		#region i_LockTimedOut
			internal static void i_LockTimedOutNoException(LockType lockType)
			{
				var logPath = fLockTimedOutLogPath;
				if (logPath != null)
				{
					try
					{
						if (!Directory.Exists(logPath))
							Directory.CreateDirectory(logPath);
						
						DateTime now = DateTime.Now;
						string filePath = logPath + now.ToString("yyyy-MM-dd") + ".log";
						
						var stackTrace = new StackTrace();
						File.AppendAllText(filePath, now.ToString("HH:mm:ss") + " " + lockType + "\r\n" + stackTrace.ToString() + "\r\n\r\n");
					}
					catch
					{
					}
				}
			
				var timedOut = TimedOut;
				if (timedOut != null)
				{
					TimedOutEventArgs args = new TimedOutEventArgs(lockType);
					timedOut.Invoke(null, args);
				}
			}
			internal static TimeoutException i_LockTimedOutException(LockType lockType)
			{
				i_LockTimedOutNoException(lockType);
				
				return new TimeoutException(string.Format("Timed out while acquiring a \"{0}\" lock.", lockType.ToString()));
			}
		#endregion
	}
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Paulo Zemek
Engineer Microsoft Corporation
United States United States
I started to program computers when I was 11 years old, as a hobbist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.

At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do they work easier, faster and with less errors.

Now I just started working as a Senior Software Engineer at Microsoft.

Want more info or simply want to contact me?
Take a look at: http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com

Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (now I work at Microsoft so I can't be a Microsoft MVP anymore)

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