Add project files.

src/modules/Elsa.Caching/Services/CacheManager.cs

@@ -0,0 +1,31 @@
+using Elsa.Caching.Options;
+using Microsoft.Extensions.Caching.Memory;
+using Microsoft.Extensions.Options;
+using Microsoft.Extensions.Primitives;
+
+namespace Elsa.Caching.Services;
+
+/// <inheritdoc />
+public class CacheManager(IMemoryCache memoryCache, IChangeTokenSignaler changeTokenSignaler, IOptions<CachingOptions> options) : ICacheManager
+{
+    /// <inheritdoc />
+    public IOptions<CachingOptions> CachingOptions => options;
+
+    /// <inheritdoc />
+    public IChangeToken GetToken(string key)
+    {
+        return changeTokenSignaler.GetToken(key);
+    }
+
+    /// <inheritdoc />
+    public ValueTask TriggerTokenAsync(string key, CancellationToken cancellationToken = default)
+    {
+        return changeTokenSignaler.TriggerTokenAsync(key, cancellationToken);
+    }
+    
+    /// <inheritdoc />
+    public async Task<TItem?> GetOrCreateAsync<TItem>(object key, Func<ICacheEntry, Task<TItem>> factory)
+    {
+        return await memoryCache.GetOrCreateAsync(key, async entry => await factory(entry));
+    }
+}