mono/mcs/class/System.Web/System.Web.Caching/InMemoryOutputCacheProvider.cs

//
// Authors:
//   Marek Habersack <[email protected]>
//
// (C) 2010 Novell, Inc (http://novell.com/)
//

//
// 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.Collections.Generic;
using System.Configuration.Provider;
using System.Web;

namespace System.Web.Caching
{
	sealed class InMemoryOutputCacheProvider : OutputCacheProvider
	{
		const string CACHE_PREFIX = "@InMemoryOCP_";
		public InMemoryOutputCacheProvider ()
		{}

		public override object Add (string key, object entry, DateTime utcExpiry)
		{
			return HttpRuntime.InternalCache.Add (CACHE_PREFIX + key, entry, null, utcExpiry.ToLocalTime (), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null);
		}

		public override object Get (string key)
		{
			return HttpRuntime.InternalCache.Get (CACHE_PREFIX + key);
		}

		public override void Remove (string key)
		{
			HttpRuntime.InternalCache.Remove (CACHE_PREFIX + key);
		}

		public override void Set (string key, object entry, DateTime utcExpiry)
		{
			Cache cache = HttpRuntime.InternalCache;
			string cacheKey = CACHE_PREFIX + key;
			object oldObject = cache.Get (cacheKey);

			if (oldObject != null)
				cache.Remove (cacheKey);
			
			cache.Add (cacheKey, entry, null, utcExpiry.ToLocalTime (), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null);
		}
	}
}