updates

src/Caching/Caching/src/DistributedCacheServiceExtensions.cs

@@ -29,5 +29,6 @@ public static IServiceCollection AddTypedDistributedCache(this IServiceCollectio
 
 public sealed class TypedDistributedCacheOptions
 {
+    // TBD
 }
 

src/Caching/Caching/src/DistributedCacheT.cs

@@ -36,6 +36,8 @@ public ValueTask<T> GetAsync<TState>(string key, TState state, Func<TState, Canc
 
     }
 
+    ValueTask IDistributedCache<T>.RefreshAsync(string key, CancellationToken cancellationToken) => new(_backend.RefreshAsync(key, cancellationToken));
+
     private ValueTask<T> GetBufferedBackendAsync<TState>(string key, TState state, Func<TState, CancellationToken, ValueTask<T>> callback, DistributedCacheEntryOptions? options, CancellationToken cancellationToken)
     {
         var buffer = new RecyclableArrayBufferWriter<byte>();

src/Caching/Caching/src/IBufferDistributedCache.cs

@@ -4,8 +4,13 @@
 using System.Buffers;
 
 namespace Microsoft.Extensions.Caching.Distributed;
-interface IBufferDistributedCache : IDistributedCache
+public interface IBufferDistributedCache : IDistributedCache
 {
     ValueTask<bool> TryGetAsync(string key, IBufferWriter<byte> destination, CancellationToken cancellationToken);
     ValueTask SetAsync(string key, ReadOnlySequence<byte> value, DistributedCacheEntryOptions options, CancellationToken cancellationToken);
 }
+
+public interface IDistributedCacheInvalidation : IDistributedCache
+{
+    event Func<string, ValueTask> CacheKeyInvalidated;
+}

src/Caching/Caching/src/IDistributedCacheT.cs

@@ -14,5 +14,7 @@ public interface IDistributedCache<T>
     ValueTask<T> GetAsync<TState>(string key, TState state, Func<TState, CancellationToken, ValueTask<T>> callback, DistributedCacheEntryOptions? options = null, CancellationToken cancellationToken = default);
 
     ValueTask RemoveAsync(string key, CancellationToken cancellationToken = default);
+
+    ValueTask RefreshAsync(string key, CancellationToken cancellationToken = default);
 }
 

src/Caching/Caching/src/PublicAPI.Unshipped.txt

@@ -1,12 +1,18 @@
 #nullable enable
 Microsoft.Extensions.Caching.Distributed.DistributedCacheServiceExtensions
+Microsoft.Extensions.Caching.Distributed.IBufferDistributedCache
+Microsoft.Extensions.Caching.Distributed.IBufferDistributedCache.SetAsync(string! key, System.Buffers.ReadOnlySequence<byte> value, Microsoft.Extensions.Caching.Distributed.DistributedCacheEntryOptions! options, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.ValueTask
+Microsoft.Extensions.Caching.Distributed.IBufferDistributedCache.TryGetAsync(string! key, System.Buffers.IBufferWriter<byte>! destination, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.ValueTask<bool>
 Microsoft.Extensions.Caching.Distributed.ICacheSerializer<T>
 Microsoft.Extensions.Caching.Distributed.ICacheSerializer<T>.Deserialize(System.Buffers.ReadOnlySequence<byte> source) -> T
 Microsoft.Extensions.Caching.Distributed.ICacheSerializer<T>.Serialize(T value, System.Buffers.IBufferWriter<byte>! target) -> void
 Microsoft.Extensions.Caching.Distributed.IDistributedCache<T>
 Microsoft.Extensions.Caching.Distributed.IDistributedCache<T>.GetAsync(string! key, System.Func<System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<T>>! callback, Microsoft.Extensions.Caching.Distributed.DistributedCacheEntryOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.ValueTask<T>
 Microsoft.Extensions.Caching.Distributed.IDistributedCache<T>.GetAsync<TState>(string! key, TState state, System.Func<TState, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<T>>! callback, Microsoft.Extensions.Caching.Distributed.DistributedCacheEntryOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.ValueTask<T>
+Microsoft.Extensions.Caching.Distributed.IDistributedCache<T>.RefreshAsync(string! key, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.ValueTask
 Microsoft.Extensions.Caching.Distributed.IDistributedCache<T>.RemoveAsync(string! key, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.ValueTask
+Microsoft.Extensions.Caching.Distributed.IDistributedCacheInvalidation
+Microsoft.Extensions.Caching.Distributed.IDistributedCacheInvalidation.CacheKeyInvalidated -> System.Func<string!, System.Threading.Tasks.ValueTask>!
 Microsoft.Extensions.Caching.Distributed.TypedDistributedCacheOptions
 Microsoft.Extensions.Caching.Distributed.TypedDistributedCacheOptions.TypedDistributedCacheOptions() -> void
 static Microsoft.Extensions.Caching.Distributed.DistributedCacheServiceExtensions.AddTypedDistributedCache(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> Microsoft.Extensions.DependencyInjection.IServiceCollection!