namespace Test.DataAccess
{
	public partial class PersonEntities
	{
		private static readonly object s_objSync = new object();
		private static readonly string UOW_DATACONTEXT_KEY = "PersonEntities_UserInstance";


		private static string s_connectionString;

		/// <summary>
		/// Uses a UnitOfWorkStore to return the same instance of PersonEntities, that is unique
		/// per user, per postback (or CallContext, if not in an HttpContext environment, such as unit tests or console apps)
		/// </summary>
		public static PersonEntities Instance
		{
			get
			{
				// Dirty (non thread-safe) check
				if (UnitOfWorkStore.GetData(UOW_DATACONTEXT_KEY) == null)
				{
					lock (s_objSync)
					{
						// Thread-safe check
						if (UnitOfWorkStore.GetData(UOW_DATACONTEXT_KEY) == null)
						{
							PersonEntities context = new PersonEntities();
							s_connectionString = context.Connection.ConnectionString;
							UnitOfWorkStore.SetData(UOW_DATACONTEXT_KEY, context);
						}
					}
				}
				return (PersonEntities)UnitOfWorkStore.GetData(UOW_DATACONTEXT_KEY);
			}

			/*
			// This could be used if we wanted to add a method that disposed the current DataContext, and created a new one.
			private set
			{
				UnitOfWorkStore.SetData(UOW_DATACONTEXT_KEY, value);
			}
			*/
		}


		public static string ConnectionString
		{
			get { return s_connectionString; }
		}

	}
}