Brings back support for StringData in ATS provider

src/Azure/Orleans.Persistence.AzureStorage/Providers/Storage/AzureTableStorage.cs

@@ -40,6 +40,7 @@ public class AzureTableGrainStorage : IGrainStorage, IRestExceptionDecoder, ILif
 
         private const string BINARY_DATA_PROPERTY_NAME = "Data";
         private const string STRING_DATA_PROPERTY_NAME = "StringData";
+
         private readonly string name;
 
         /// <summary> Default constructor </summary>
@@ -202,23 +203,29 @@ private static async Task DoOptimisticUpdate(Func<Task> updateOperation, string
         /// </remarks>
         internal void ConvertToStorageFormat<T>(T grainState, TableEntity entity)
         {
-            int dataSize;
-            IEnumerable<ReadOnlyMemory<byte>> properties;
-            string basePropertyName;
+            var binaryData = storageSerializer.Serialize<T>(grainState);
 
-            // Convert to binary format
-            var data = this.storageSerializer.Serialize<T>(grainState);
-            basePropertyName = BINARY_DATA_PROPERTY_NAME;
+            CheckMaxDataSize(binaryData.ToMemory().Length, MAX_DATA_CHUNK_SIZE * MAX_DATA_CHUNKS_COUNT);
 
-            dataSize = data.ToMemory().Length;
-            properties = SplitBinaryData(data);
+            if (options.UseStringFormat)
+            {
+                var properties = SplitStringData(binaryData.ToString().AsMemory());
 
-            CheckMaxDataSize(dataSize, MAX_DATA_CHUNK_SIZE * MAX_DATA_CHUNKS_COUNT);
+                foreach (var keyValuePair in properties.Zip(GetPropertyNames(STRING_DATA_PROPERTY_NAME),
+                (property, name) => new KeyValuePair<string, object>(name, property.ToString())))
+                {
+                    entity[keyValuePair.Key] = keyValuePair.Value;
+                }
+            }
+            else
+            {
+                var properties = SplitBinaryData(binaryData);
 
-            foreach (var keyValuePair in properties.Zip(GetPropertyNames(basePropertyName),
+                foreach (var keyValuePair in properties.Zip(GetPropertyNames(BINARY_DATA_PROPERTY_NAME),
                 (property, name) => new KeyValuePair<string, object>(name, property.ToArray())))
-            {
-                entity[keyValuePair.Key] = keyValuePair.Value;
+                {
+                    entity[keyValuePair.Key] = keyValuePair.Value;
+                }
             }
         }
 

src/Azure/Orleans.Persistence.AzureStorage/Providers/Storage/AzureTableStorageOptions.cs

@@ -19,6 +19,11 @@ public class AzureTableStorageOptions : AzureStorageOperationOptions, IStoragePr
         /// </summary>
         public bool DeleteStateOnClear { get; set; } = false;
 
+        /// <summary>
+        /// Indicates if grain data should be stored in string or in binary format.
+        /// </summary>
+        public bool UseStringFormat { get; set; }
+
         /// <summary>
         /// Stage of silo lifecycle where storage should be initialized.  Storage must be initialized prior to use.
         /// </summary>

test/Extensions/TesterAzureUtils/Persistence/PersistenceProviderTests.cs

@@ -166,6 +166,40 @@ public async Task PersistenceProvider_Azure_ChangeWriteFormat(int? stringLength,
             await Test_PersistenceProvider_WriteRead(testName, store, grainState, grainId);
         }
 
+        [SkippableTheory, TestCategory("Functional"), TestCategory("AzureStorage")]
+        [InlineData(null, true, false)]
+        [InlineData(null, false, true)]
+        [InlineData(15 * 32 * 1024 - 256, true, false)]
+        [InlineData(15 * 32 * 1024 - 256, false, true)]
+        public async Task PersistenceProvider_Azure_ChangeStorageDataFormat_WhenJsonSerializerIsUsed(int? stringLength, bool useStringFormatForFirstWrite, bool useStringFormatForSecondWrite)
+        {
+            // always use JsonSerializer over OrleansSerializer since specifying 'useStringFormat = true'
+            // writes to 'StringData', the OrleansSerializer can not read from the 'StringData' column as its not a format which it expects.
+            const bool useJson = true;
+
+            var testName = string.Format("{0}({1}={2},{3}={4},{5}={6})",
+                nameof(PersistenceProvider_Azure_ChangeStorageDataFormat_WhenJsonSerializerIsUsed),
+                nameof(stringLength), stringLength == null ? "default" : stringLength.ToString(),
+                "strFormat1stW", useStringFormatForFirstWrite,
+                "strFormat2ndW", useStringFormatForSecondWrite);
+
+            var grainState = TestStoreGrainState.NewRandomState(stringLength);
+            EnsureEnvironmentSupportsState(grainState);
+
+            var grainId = LegacyGrainId.NewId();
+
+            var store = await InitAzureTableGrainStorage(useJson: useJson, useStringFormat: useStringFormatForFirstWrite);
+
+            await Test_PersistenceProvider_WriteRead(testName, store, grainState, grainId);
+
+            grainState = TestStoreGrainState.NewRandomState(stringLength);
+            grainState.ETag = "*";
+
+            store = await InitAzureTableGrainStorage(useJson: useJson, useStringFormat: useStringFormatForSecondWrite);
+
+            await Test_PersistenceProvider_WriteRead(testName, store, grainState, grainId);
+        }
+
         [SkippableTheory, TestCategory("Functional"), TestCategory("AzureStorage")]
         [InlineData(null, false)]
         [InlineData(null, true)]
@@ -266,8 +300,13 @@ private async Task<AzureTableGrainStorage> InitAzureTableGrainStorage(AzureTable
             return store;
         }
 
-        private async Task<AzureTableGrainStorage> InitAzureTableGrainStorage(bool useJson = false, TypeNameHandling? typeNameHandling = null)
+        private async Task<AzureTableGrainStorage> InitAzureTableGrainStorage(bool useJson = false, bool useStringFormat = false, TypeNameHandling? typeNameHandling = null)
         {
+            if (useStringFormat && !useJson)
+            {
+                throw new InvalidOperationException($"Using {nameof(OrleansGrainStorageSerializer)} in conjuction with string data format makes no sense, there for stopping attempt.");
+            }
+
             var options = new AzureTableStorageOptions();
             var jsonOptions = this.providerRuntime.ServiceProvider.GetService<IOptions<OrleansJsonSerializerOptions>>();
             if (typeNameHandling != null)
@@ -276,6 +315,7 @@ private async Task<AzureTableGrainStorage> InitAzureTableGrainStorage(bool useJs
             }
 
             options.ConfigureTestDefaults();
+            options.UseStringFormat = useStringFormat;
 
             // TODO change test to include more serializer?
             var binarySerializer = new OrleansGrainStorageSerializer(this.providerRuntime.ServiceProvider.GetRequiredService<Serializer>());