Implement GetWithCasAsync

Author: cnblogs-dudu

Enyim.Caching/IMemcachedClient.cs

@@ -28,6 +28,7 @@ public interface IMemcachedClient : IDisposable
         CasResult<object> GetWithCas(string key);
         CasResult<T> GetWithCas<T>(string key);
         IDictionary<string, CasResult<object>> GetWithCas(IEnumerable<string> keys);
+        Task<IDictionary<string, CasResult<object>>> GetWithCasAsync(IEnumerable<string> keys);
 
         bool Append(string key, ArraySegment<byte> data);
         CasResult<bool> Append(string key, ulong cas, ArraySegment<byte> data);

Enyim.Caching/MemcachedClient.cs

@@ -975,7 +975,16 @@ public async Task<IDictionary<string, T>> GetAsync<T>(IEnumerable<string> keys)
 
         public IDictionary<string, CasResult<object>> GetWithCas(IEnumerable<string> keys)
         {
-            return PerformMultiGet<CasResult<object>>(keys, (mget, kvp) => new CasResult<object>
+            return PerformMultiGet(keys, (mget, kvp) => new CasResult<object>
+            {
+                Result = this.transcoder.Deserialize(kvp.Value),
+                Cas = mget.Cas[kvp.Key]
+            });
+        }
+
+        public async Task<IDictionary<string, CasResult<object>>> GetWithCasAsync(IEnumerable<string> keys)
+        {
+            return await PerformMultiGetAsync(keys, (mget, kvp) => new CasResult<object>
             {
                 Result = this.transcoder.Deserialize(kvp.Value),
                 Cas = mget.Cas[kvp.Key]

Enyim.Caching/NullMemcachedClient.cs

@@ -122,6 +122,11 @@ public IDictionary<string, CasResult<object>> GetWithCas(IEnumerable<string> key
             return new Dictionary<string, CasResult<object>>();
         }
 
+        public async Task<IDictionary<string, CasResult<object>>> GetWithCasAsync(IEnumerable<string> keys)
+        {
+            return await Task.FromResult(new Dictionary<string, CasResult<object>>());
+        }
+
         public CasResult<object> GetWithCas(string key)
         {
             return new CasResult<object>();