#region Copyright
// /************************************************************************
// Copyright (c) 2016 Jamie Rees
// File: MemoryCacheProvider.cs
// Created By: Jamie Rees
//
// 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.
// ************************************************************************/
#endregion
using System;
using System.Linq;
using System.Runtime.Caching;
namespace PlexRequests.Helpers
{
public class MemoryCacheProvider : ICacheProvider
{
private ObjectCache Cache => MemoryCache.Default;
///
/// Gets the item from the cache, if the item is not present
/// then we will get that item and store it in the cache.
///
/// Type to store in the cache.
/// The key.
/// The item callback. This will be called if the item is not present in the cache.
///
/// The amount of time we want to cache the object.
/// A copy of the cached object.
/// If the ]]> itemCallback is null and the item is not in the cache it will throw a .
/// If you do not want to change the object in the cache (since it's a copy returned and not a reference) you will need to
/// the cached item and then it, or just call this method.
public T GetOrSet(string key, Func itemCallback, int cacheTime = 20) where T : class
{
var item = Get(key);
if (item == null)
{
item = itemCallback();
if (item != null)
{
Set(key, item, cacheTime);
}
}
// Return a copy, not the stored cache reference
// The cached object will not change
// If we
return item.CloneJson();
}
///
/// Gets the specified item from the cache.
///
/// Type to get from the cache
/// The key.
///
public T Get(string key) where T : class
{
var item = Cache.Get(key) as T;
return item;
}
///
/// Set/Store the specified object in the cache
///
/// The key.
/// The object we want to store.
/// The amount of time we want to cache the object.
public void Set(string key, object data, int cacheTime = 20)
{
var policy = new CacheItemPolicy { AbsoluteExpiration = DateTime.Now + TimeSpan.FromMinutes(cacheTime) };
Cache.Add(new CacheItem(key, data), policy);
}
///
/// Removes the specified object from the cache.
///
/// The key.
public void Remove(string key)
{
var keys = Cache.Where(x => x.Key.Contains(key));
foreach (var k in keys)
{
Cache.Remove(k.Key);
}
}
}
}