SimpleCache

SimpleCache.cs

using System;
using System.Runtime.Caching;

namespace BOC.Samples.Caching
{
    /// <summary>A simple wrapper for the .NET memory cache.</summary>
    /// <remarks>Samples to create this class were taken from the following posts:
    ///     - http://www.allinsight.de/caching-objects-in-net-with-memorycache/
    ///     - http://www.codeproject.com/Articles/756423/How-to-Cache-Objects-Simply-using-System-Runtime-C
    /// </remarks>
    public static class SampleDataCache
    {
        private static MemoryCache _cache = new MemoryCache("cache-name-here");

        private static readonly object cacheLocker = new object();

        /// <summary></summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <remarks>NOTE: Items added are set to automatically expire after 1 hour.</remarks>
        public static void AddItem(string key, object value)
        {
            lock (cacheLocker)
            {
                var expirationPolicy = new CacheItemPolicy();
                expirationPolicy.AbsoluteExpiration = DateTimeOffset.Now.AddHours(1);

                _cache.Add(key, value, expirationPolicy);
            }
        }

        /// <summary></summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="minutesToHold">Tell the cache how long to hang onto the data.</param>
        public static void AddItem(string key, object value, double minutesToHold)
        {
            lock (cacheLocker)
            {
                var expirationPolicy = new CacheItemPolicy();
                expirationPolicy.AbsoluteExpiration = DateTimeOffset.Now.AddMinutes(minutesToHold);

                _cache.Add(key, value, expirationPolicy);
            }
        }

        /// <summary></summary>
        /// <param name="key"></param>
        public static object FetchItem(string key)
        {
            lock (cacheLocker)
            {
                return _cache.Get(key);
            }
        }

        /// <summary></summary>
        /// <param name="key"></param>
        public static void DeleteItem(string key)
        {
            lock (cacheLocker)
            {
                _cache.Remove(key);
            }
        }

        /// <summary></summary>
        public static int ItemCount()
        {
            lock (cacheLocker)
            {
                return (int)_cache.GetCount();
            }
        }
    }
}