BuildCycleMessageFor() public method

public BuildCycleMessageFor ( IHandler duplicateHandler, System.StringBuilder message ) : void
duplicateHandler IHandler
message System.StringBuilder
return void
Ejemplo n.º 1
0
		/// <summary>
		///   Returns an instance of the component this handler
		///   is responsible for
		/// </summary>
		/// <param name = "context"> </param>
		/// <param name = "requiresDecommission"> </param>
		/// <param name = "instanceRequired"> </param>
		/// <param name = "burden"> </param>
		/// <returns> </returns>
		protected object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired, out Burden burden)
		{
			if (IsBeingResolvedInContext(context))
			{
				var cache = lifestyleManager as IContextLifestyleManager;
				if (cache != null)
				{
					var instance = cache.GetContextInstance(context);
					if (instance != null)
					{
						burden = null;
						return instance;
					}
				}

				if (instanceRequired == false)
				{
					burden = null;
					return null;
				}
				var message = new StringBuilder();
				message.AppendFormat("Dependency cycle has been detected when trying to resolve component '{0}'.",
				                     ComponentModel.Name);
				message.AppendLine();
				message.AppendLine("The resolution tree that resulted in the cycle is the following:");
				context.BuildCycleMessageFor(this, message);

				throw new CircularDependencyException(message.ToString(), ComponentModel);
			}
			if (CanResolvePendingDependencies(context) == false)
			{
				if (instanceRequired == false)
				{
					burden = null;
					return null;
				}

				AssertNotWaitingForDependency();
			}
			try
			{
				using (var ctx = context.EnterResolutionContext(this, requiresDecommission))
				{
					var instance = lifestyleManager.Resolve(context, context.ReleasePolicy);
					burden = ctx.Burden;
					return instance;
				}
			}
			catch (NoResolvableConstructorFoundException)
			{
				throw UnresolvableHandlerException();
			}
		}