MonoRail/Castle.MonoRail.WindsorExtension/ContainerAccessorUtil.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.MonoRail.WindsorExtension
  16 {
  17         using System;
  18         using System.Web;
  19
  20         using Castle.Windsor;
  21
  22         using Castle.MonoRail.Framework;
  23
  24
  25         /// <summary>
  26         /// Uses the HttpContext and the <see cref="IContainerAccessor"/>
  27         /// to access the container instance.
  28         /// </summary>
  29         public abstract class ContainerAccessorUtil
  30         {
  31                 public static IWindsorContainer ObtainContainer()
  32                 {
  33                         IContainerAccessor containerAccessor =
  34                                 HttpContext.Current.ApplicationInstance as IContainerAccessor;
  35
  36                         if (containerAccessor == null)
  37                         {
  38                                 throw new RailsException("You must extend the HttpApplication in your web project " +
  39                                         "and implement the IContainerAccessor to properly expose your container instance");
  40                         }
  41
  42                         IWindsorContainer container = containerAccessor.Container;
  43
  44                         if (container == null)
  45                         {
  46                                 throw new RailsException("The container seems to be unavailable in " +
  47                                         "your HttpApplication subclass");
  48                         }
  49
  50                         return container;
  51                 }
  52         }
  53 }