//
// System.Web.HttpTaskAsyncHandler.cs
//
// Author:
//   Kornel Pal (kornelpal@gmail.com)
//
// Copyright (C) 2014 Kornel Pal
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.ComponentModel;
using System.Threading.Tasks;

namespace System.Web
{
	public abstract class HttpTaskAsyncHandler : IHttpAsyncHandler, IHttpHandler
	{
		public virtual bool IsReusable {
			get { return false; }
		}

		[EditorBrowsable (EditorBrowsableState.Never)]
		public virtual void ProcessRequest (HttpContext context)
		{
			throw new NotSupportedException ("This handler cannot be executed synchronously.");
		}

		public abstract Task ProcessRequestAsync (HttpContext context);

		IAsyncResult IHttpAsyncHandler.BeginProcessRequest (HttpContext context, AsyncCallback cb, object extraData)
		{
			Task task = ProcessRequestAsync (context);
			return TaskAsyncResult.GetAsyncResult (task, cb, extraData);
		}

		void IHttpAsyncHandler.EndProcessRequest (IAsyncResult result)
		{
			TaskAsyncResult.Wait (result);
		}
	}
}
