src/DotNetCommon.Core/Cache/Impl/MemoryCache.cs

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//using DotNetCommon.Cache.Internal;
//using DotNetCommon.Logger;
//using System;
//using System.Collections.Concurrent;
//using System.Collections.Generic;
//using System.Runtime.CompilerServices;
//using System.Text;
//using System.Threading;
//using System.Threading.Tasks;
//
//namespace DotNetCommon.Cache.Impl
//{
//    /// <summary>
//    /// An implementation of <see cref="IMemoryCache"/> using a dictionary to
//    /// store its entries.
//    /// </summary>
//    internal class MemoryCache : IMemoryCache
//    {
//        internal readonly ILogger _logger;
//
//        private readonly MemoryCacheOptions _options;
//        internal readonly ConcurrentDictionary<object, CacheEntry> _entries;
//
//        private long _cacheSize;
//        private bool _disposed;
//        private DateTimeOffset _lastExpirationScan;
//
//        /// <summary>
//        /// Creates a new <see cref="MemoryCache"/> instance.
//        /// </summary>
//        public MemoryCache(MemoryCacheOptions options)
//        {
//            if (options == null)
//            {
//                throw new ArgumentNullException(nameof(options));
//            }
//
//            _options = options;
//            _logger = LoggerFactory.CreateLogger<MemoryCache>();
//
//            _entries = new ConcurrentDictionary<object, CacheEntry>();
//
//            if (_options.Clock == null)
//            {
//                _options.Clock = new SystemClock();
//            }
//
//            _lastExpirationScan = _options.Clock.UtcNow;
//        }
//
//        /// <summary>
//        /// Cleans up the background collection events.
//        /// </summary>
//        ~MemoryCache() => Dispose(false);
//
//        /// <summary>
//        /// Gets the count of the current entries for diagnostic purposes.
//        /// </summary>
//        public int Count => _entries.Count;
//