From 0a3891a33233b01799ba06be8568ad94beb48570 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A4=D1=80=D0=BE=D0=BB=D0=BE=D0=B2?=
 <nikita.grigorevich@gmail.com>
Date: Mon, 18 Oct 2021 11:06:42 +0500
Subject: [PATCH] fix CacheDb. Make cache ConcurrentDictionary

---
 AsbCloudInfrastructure/Services/Cache/CacheDb.cs | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/AsbCloudInfrastructure/Services/Cache/CacheDb.cs b/AsbCloudInfrastructure/Services/Cache/CacheDb.cs
index dcd27a58..ea84bd9e 100644
--- a/AsbCloudInfrastructure/Services/Cache/CacheDb.cs
+++ b/AsbCloudInfrastructure/Services/Cache/CacheDb.cs
@@ -9,8 +9,8 @@ namespace AsbCloudInfrastructure.Services.Cache
 
     public class CacheDb
     {
-        private readonly Dictionary<string, (DateTime, IEnumerable)> cache = 
-            new Dictionary<string, (DateTime, IEnumerable)>();
+        private readonly ConcurrentDictionary<string, (DateTime, IEnumerable)> cache = 
+            new ConcurrentDictionary<string, (DateTime, IEnumerable)>();
 
         private readonly TimeSpan obsolesenceTime = TimeSpan.FromMinutes(15);
 
@@ -19,12 +19,11 @@ namespace AsbCloudInfrastructure.Services.Cache
         {
             var entityTypeName = typeof(TEntity).FullName;
 
-            if (!cache.ContainsKey(entityTypeName))
-                cache[entityTypeName] = (DateTime.Now, new List<TEntity>());
+            var cacheItem = cache.GetOrAdd(entityTypeName, (DateTime.Now, new List<TEntity>()));
 
-            bool isCachedDataObsolete = DateTime.Now - cache[entityTypeName].Item1 > obsolesenceTime;
+            bool isCachedDataObsolete = DateTime.Now - cacheItem.Item1 > obsolesenceTime;
 
-            var tableCache = new CacheTable<TEntity>(context, cache[entityTypeName]);
+            var tableCache = new CacheTable<TEntity>(context, cacheItem);
 
             if (isCachedDataObsolete)
                 tableCache.Refresh();