Update

MesETL.App/Cache/MemoryCache.cs

@@ -0,0 +1,51 @@
+using System.Collections.Concurrent;
+
+namespace MesETL.App.Cache;
+
+public class MemoryCache : ICacher
+{
+    private readonly ConcurrentDictionary<string, string> _stringCache = new();
+    private readonly ConcurrentDictionary<string, Dictionary<string, string>> _hashCache = new();
+    
+    public static MemoryCache Instance { get; private set; }
+
+    public MemoryCache()
+    {
+        Instance = this;
+    }
+    
+    public Task<string?> GetStringAsync(string key)
+    {
+        return _stringCache.TryGetValue(key, out var value) ? Task.FromResult<string?>(value) : Task.FromResult((string?)null);
+    }
+
+    public Task SetStringAsync(string key, string value)
+    {
+        _stringCache[key] = value;
+        return Task.CompletedTask;
+    }
+
+    public Task<bool> ExistsAsync(string key)
+    {
+        return Task.FromResult(_stringCache.ContainsKey(key));
+    }
+
+    public Task SetHashAsync(string key, IReadOnlyDictionary<string, string> hash)
+    {
+        _hashCache[key] = hash.ToDictionary(x => x.Key, x => x.Value);
+        return Task.CompletedTask;
+    }
+
+    public Task<Dictionary<string, string>> GetHashAsync(string key)
+    {
+        return Task.FromResult(_hashCache[key]);
+    }
+
+    public void Delete(Func<string,bool> keySelector)
+    {
+        foreach (var k in _stringCache.Keys.Where(keySelector))
+        {
+            _stringCache.TryRemove(k, out _);
+        }
+    }
+}