Merge pull request #1 from SergioMatias94/feat/conditional-memory-cache-implementation

Feat: conditional memory cache implementation

Core.BluePrint.Packages.sln

@@ -7,7 +7,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Core.Blueprint.KeyVault", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Mongo", "Core.Blueprint.Mongo\Core.Blueprint.Mongo.csproj", "{27A8E3E1-D613-4D5B-8105-485699409F1E}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Redis", "Core.Blueprint.Redis\Core.Blueprint.Redis.csproj", "{11F2AA11-FB98-4A33-AEE4-CD49588D2FE1}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Caching", "Core.Blueprint.Redis\Core.Blueprint.Caching.csproj", "{11F2AA11-FB98-4A33-AEE4-CD49588D2FE1}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Core.Blueprint.Storage", "Core.Blueprint.Storage\Core.Blueprint.Storage.csproj", "{636E4520-79F9-46C8-990D-08F2D24A151C}"
 EndProject

Core.Blueprint.Redis/Adapters/CacheSettings.cs

@@ -1,10 +1,4 @@
-using System;
+namespace Core.Blueprint.Caching.Adapters
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Core.Blueprint.Redis
 {
     public interface ICacheSettings
     {

Core.Blueprint.Redis/Configuration/RegisterBlueprint.cs

@@ -1,8 +1,10 @@
-using Microsoft.Extensions.Configuration;
+using Core.Blueprint.Caching.Adapters;
+using Core.Blueprint.Caching.Contracts;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
-namespace Core.Blueprint.Redis.Configuration
+namespace Core.Blueprint.Caching.Configuration
 {
     /// <summary>
     /// Provides extension methods for registering Redis-related services in the DI container.
@@ -17,23 +19,32 @@ namespace Core.Blueprint.Redis.Configuration
         /// <returns>The updated service collection.</returns>
         public static IServiceCollection AddRedis(this IServiceCollection services, IConfiguration configuration)
         {
-            // Retrieve the Redis connection string from the configuration.
+            // TODO for the following variable we'll need to add in the appsettings.json the following config: "UseRedisCache": true,
-            // Get Redis configuration section
+            bool useRedis = configuration.GetValue<bool>("UseRedisCache");
+            //TODO decide wheter to use appsettings or the following ENV variable
+            useRedis = Environment.GetEnvironmentVariable("CORE_BLUEPRINT_PACKAGES_USE_REDIS")?.ToLower() == "true";
+
+            if (useRedis)
+            {
                 var redisConnectionString = configuration.GetSection("ConnectionStrings:Redis").Value;
                 if (string.IsNullOrEmpty(redisConnectionString))
                 {
                     throw new InvalidOperationException("Redis connection is not configured.");
                 }
 
-            // Register RedisCacheProvider
+                services.AddSingleton<ICacheProvider>(provider =>
-            services.AddSingleton<IRedisCacheProvider>(provider =>
                     new RedisCacheProvider(redisConnectionString, provider.GetRequiredService<ILogger<RedisCacheProvider>>()));
+            }
+            else
+            {
+                services.AddMemoryCache();
+                services.AddSingleton<ICacheProvider, MemoryCacheProvider>();
+            }
 
-            // Get CacheSettings and register with the ICacheSettings interface
             var cacheSettings = configuration.GetSection("CacheSettings").Get<CacheSettings>();
             if (cacheSettings == null)
             {
-                throw new InvalidOperationException("Redis CacheSettings section is not configured.");
+                throw new InvalidOperationException("CacheSettings section is not configured.");
             }
             services.AddSingleton<ICacheSettings>(cacheSettings);
 

Core.Blueprint.Redis/Contracts/ICacheProvider.cs

@@ -1,9 +1,9 @@
-namespace Core.Blueprint.Redis
+namespace Core.Blueprint.Caching.Contracts
 {
     /// <summary>
     /// Interface for managing Redis cache operations.
     /// </summary>
-    public interface IRedisCacheProvider
+    public interface ICacheProvider
     {
         /// <summary>
         /// Retrieves a cache item by its key.

Core.Blueprint.Redis/Core.Blueprint.Caching.csproj

@@ -8,6 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Azure.StackExchangeRedis" Version="3.2.0" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.2" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.0" />

Core.Blueprint.Redis/Helpers/RedisCacheKeyHelper.cs

@@ -1,11 +1,7 @@
-using System;
+using System.Text;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 
-namespace Core.Blueprint.Redis.Helpers
+namespace Core.Blueprint.Caching.Helpers
 {
     /// <summary>
     /// Helper class for generating consistent and normalized cache keys.

Core.Blueprint.Redis/MemoryCacheProvider.cs

@@ -0,0 +1,86 @@
+using Core.Blueprint.Caching.Contracts;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Caching.Memory;
+using System.Text.Json;
+
+namespace Core.Blueprint.Caching
+{
+    public sealed class MemoryCacheProvider : ICacheProvider
+    {
+        private readonly IMemoryCache _cache;
+        private readonly ILogger<MemoryCacheProvider> _logger;
+        public MemoryCacheProvider(IMemoryCache cache, ILogger<MemoryCacheProvider> logger)
+        {
+            _cache = cache;
+            _logger = logger;
+        }
+
+        public ValueTask<TEntity> GetAsync<TEntity>(string key)
+        {
+            if (_cache.TryGetValue(key, out var value))
+            {
+                if (value is TEntity typedValue)
+                {
+                    return ValueTask.FromResult(typedValue);
+                }
+
+                try
+                {
+                    var json = value?.ToString();
+                    var deserialized = JsonSerializer.Deserialize<TEntity>(json);
+                    return ValueTask.FromResult(deserialized);
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogWarning(ex, "Error deserializing cache value for key {Key}", key);
+                }
+            }
+
+            return ValueTask.FromResult(default(TEntity));
+        }
+
+        public ValueTask SetAsync<TEntity>(string key, TEntity value, TimeSpan? expiry = null)
+        {
+            var options = new MemoryCacheEntryOptions();
+            if (expiry.HasValue)
+            {
+                options.SetAbsoluteExpiration(expiry.Value);
+            }
+
+            _cache.Set(key, value, options);
+            return ValueTask.CompletedTask;
+        }
+
+        public ValueTask RemoveAsync(string key)
+        {
+            _cache.Remove(key);
+            return ValueTask.CompletedTask;
+        }
+
+        public ValueTask<bool> ExistsAsync(string key)
+        {
+            return ValueTask.FromResult(_cache.TryGetValue(key, out _));
+        }
+
+        public ValueTask RefreshAsync(string key, TimeSpan? expiry = null)
+        {
+            // MemoryCache does not support sliding expiration refresh like Redis,
+            // so we must re-set the value manually if required.
+
+            if (_cache.TryGetValue(key, out var value))
+            {
+                _cache.Remove(key);
+
+                var options = new MemoryCacheEntryOptions();
+                if (expiry.HasValue)
+                {
+                    options.SetAbsoluteExpiration(expiry.Value);
+                }
+
+                _cache.Set(key, value, options);
+            }
+
+            return ValueTask.CompletedTask;
+        }
+    }
+}

Core.Blueprint.Redis/RedisCacheProvider.cs

@@ -1,14 +1,15 @@
 using Azure.Identity;
+using Core.Blueprint.Caching.Contracts;
 using Microsoft.Extensions.Logging;
 using StackExchange.Redis;
 using System.Text.Json;
 
-namespace Core.Blueprint.Redis
+namespace Core.Blueprint.Caching
 {
     /// <summary>
     /// Redis cache provider for managing cache operations.
     /// </summary>
-    public sealed class RedisCacheProvider : IRedisCacheProvider
+    public sealed class RedisCacheProvider : ICacheProvider
     {
         private IDatabase _cacheDatabase = null!;
         private readonly ILogger<RedisCacheProvider> _logger;