Review cache con FusionCache

MP.SPEC/Program.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Authentication.Negotiate;
 using Microsoft.AspNetCore.StaticFiles;
+using Microsoft.Extensions.Caching.Distributed;
 using Microsoft.Extensions.FileProviders;
 using MP.AppAuth.Services;
 using MP.Data.Services;
@@ -12,7 +13,9 @@ using NLog.Web;
 using OpenTelemetry.Resources;
 using OpenTelemetry.Trace;
 using StackExchange.Redis;
-
+using ZiggyCreatures.Caching.Fusion;
+using ZiggyCreatures.Caching.Fusion.Backplane.StackExchangeRedis;
+using ZiggyCreatures.Caching.Fusion.Serialization.NewtonsoftJson;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -30,7 +33,7 @@ string connStringRedis = configuration.GetConnectionString("Redis") ?? "localhos
 //string connStringRedis = ConfMan.GetConnectionString("RedisAdmin");
 string redisSrvAddr = connStringRedis.Substring(0, connStringRedis.IndexOf(":"));
 // avvio oggetto shared x redis...
-var redisMultiplexer = ConnectionMultiplexer.Connect(connStringRedis);
+IConnectionMultiplexer redisMultiplexer = ConnectionMultiplexer.Connect(connStringRedis);
 
 
 // ====================================================================
@@ -135,9 +138,24 @@ builder.Services.AddRazorComponents()
 builder.Services.AddRazorPages();
 
 // memory + redis preliminare
-builder.Services.AddMemoryCache();
 builder.Services.AddSingleton<IConnectionMultiplexer>(redisMultiplexer);
 
+// ✅ Distributed cache (necessario per FusionCache)
+builder.Services.AddStackExchangeRedisCache(options =>
+{
+    options.Configuration = connStringRedis;
+});
+
+// ✅ FusionCache
+builder.Services.AddFusionCache()
+    .WithDistributedCache(sp => sp.GetRequiredService<IDistributedCache>())
+    .WithSerializer(new FusionCacheNewtonsoftJsonSerializer())
+    .WithBackplane(new RedisBackplane(new RedisBackplaneOptions
+    {
+        ConnectionMultiplexerFactory = () => Task.FromResult(redisMultiplexer)
+    }));
+
+
 // altri servizi
 builder.Services.AddSingleton<MpDataService>();
 builder.Services.AddSingleton<ListSelectDataSrv>();