docker files fixes from liaqat

src/Managing.Infrastructure.Storage/TaskCache.cs

@@ -0,0 +1,82 @@
+using Managing.Application.Abstractions;
+using Managing.Core;
+//using Microsoft.Extensions.Caching.Memory;
+using System.Runtime.Caching;
+
+namespace Managing.Infrastructure.Storage
+{
+    public class TaskCache : ITaskCache
+    {
+        private MemoryCache _cache { get; } = MemoryCache.Default;
+        private CacheItemPolicy _defaultPolicy { get; } = new CacheItemPolicy();
+
+        public async Task<T> AddOrGetExisting<T>(string key, Func<Task<T>> valueFactory)
+        {
+
+            var asyncLazyValue = new AsyncLazy<T>(valueFactory);
+            var existingValue = (AsyncLazy<T>)_cache.AddOrGetExisting(key, asyncLazyValue, _defaultPolicy);
+
+            if (existingValue != null)
+            {
+                asyncLazyValue = existingValue;
+            }
+
+            try
+            {
+                var result = await asyncLazyValue;
+
+                // The awaited Task has completed. Check that the task still is the same version
+                // that the cache returns (i.e. the awaited task has not been invalidated during the await).    
+                if (asyncLazyValue != _cache.AddOrGetExisting(key, new AsyncLazy<T>(valueFactory), _defaultPolicy))
+                {
+                    // The awaited value is no more the most recent one.
+                    // Get the most recent value with a recursive call.
+                    return await AddOrGetExisting(key, valueFactory);
+                }
+                return result;
+            }
+            catch (Exception)
+            {
+                // Task object for the given key failed with exception. Remove the task from the cache.
+                _cache.Remove(key);
+                // Re throw the exception to be handled by the caller.
+                throw;
+            }
+        }
+
+        public void Invalidate(string key)
+        {
+            _cache.Remove(key);
+        }
+
+        public bool Contains(string key)
+        {
+            return _cache.Contains(key);
+        }
+
+        public void Clear()
+        {
+            // A snapshot of keys is taken to avoid enumerating collection during changes.
+            var keys = _cache.Select(i => i.Key).ToList();
+            keys.ForEach(k => _cache.Remove(k));
+        }
+
+        public T Get<T>(string key)
+        {
+            var existingValue = (AsyncLazy<T>)_cache.Get(key);
+            return existingValue.Value.Result;
+        }
+
+        public virtual List<T> GetCache<T>()
+        {
+            List<T> list = new List<T>();
+            
+            foreach (var item in _cache)
+            {
+                list.Add((T)item.Value);
+            }
+
+            return list;
+        }
+    }
+}