C# IGrainState类代码示例

		public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
		{
			var tableResult = await _table.ExecuteAsync(TableOperation.Retrieve<DynamicTableEntity>(grainReference.ToKeyString(), grainType));
			if (tableResult.Result == null)
			{
				return;
			}
			var entity = tableResult.Result as DynamicTableEntity;

			var serializer = new JsonSerializer();
			using (var memoryStream = new MemoryStream())
			{
				foreach (var propertyName in entity.Properties.Keys.Where(p => p.StartsWith("d")).OrderBy(p => p))
				{
					var dataPart = entity.Properties[propertyName];
					await memoryStream.WriteAsync(dataPart.BinaryValue, 0, dataPart.BinaryValue.Length);
				}

				memoryStream.Position = 0;
				using (var bsonReader = new BsonReader(memoryStream))
				{
					var data = serializer.Deserialize<Dictionary<string, object>>(bsonReader);
					grainState.SetAll(data);
				}
			}
		}

        public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            if (!(grainState is IAggregateState))
                throw new NotAggregateStateException(grainState.GetType());

            var stream = this.GetStreamName(grainType, grainReference);

            var sliceStart = 0;
            StreamEventsSlice currentSlice;

            do
            {
                var sliceCount = sliceStart + ReadPageSize;

                currentSlice = await this.Connection.ReadStreamEventsForwardAsync(stream, sliceStart, sliceCount, true);

                if (currentSlice.Status == SliceReadStatus.StreamNotFound)
                    return;

                if (currentSlice.Status == SliceReadStatus.StreamDeleted)
                    throw new StreamDeletedException();

                sliceStart = currentSlice.NextEventNumber;

                foreach (var @event in currentSlice.Events)
                {
                    dynamic deserialisedEvent = DeserializeEvent(@event.Event);
                    StateTransformer.ApplyEvent(deserialisedEvent, grainState as IAggregateState);
                }

            } while (!currentSlice.IsEndOfStream);
        }

        public async Task ReadStateAsync(string grainType, GrainReference grainId, IGrainState grainState)
        {
            try
            {
                var blobName = BlobStorageProvider.GetBlobName(grainType, grainId);
                var blob = container.GetBlockBlobReference(blobName);
                var text = await blob.DownloadTextAsync();
                if (string.IsNullOrWhiteSpace(text))
                {
                    return;
                }

                var data = JsonConvert.DeserializeObject(text, grainState.GetType());
                var dict = ((IGrainState)data).AsDictionary();
                grainState.SetAll(dict);
            }
            catch (StorageException ex)
            {
                ;
            }
            catch (Exception ex)
            {
                Log.Error(0, ex.ToString());
            }
        }

        public async Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            try
            {
                var collection = await this.EnsureCollection(grainType);
                var documents = await this.Client.ReadDocumentFeedAsync(collection.DocumentsLink);
                var documentId = grainReference.ToKeyString();

                var document = documents.Where(d => d.Id == documentId).FirstOrDefault();

                if(document != null)
                {
                    document.State = grainState.AsDictionary();
                    await this.Client.ReplaceDocumentAsync(document);
                }
                else
                {
                    await this.Client.CreateDocumentAsync(collection.DocumentsLink,
                        new GrainStateDocument { Id = documentId, State = grainState.AsDictionary() });
                }
            }
            catch (Exception ex)
            {
                Log.Error(0, "Error in WriteStateAsync", ex);
            }
        }

 public Task<string> WriteStateAsync(string stateStore, string grainStoreKey, IGrainState grainState)
 {
     if (logger.IsVerbose) logger.Verbose("WriteStateAsync for {0} grain: {1} eTag: {2}", stateStore, grainStoreKey, grainState.ETag);
     GrainStateStore storage = GetStoreForGrain(stateStore);
     storage.UpdateGrainState(grainStoreKey, grainState);
     if (logger.IsVerbose) logger.Verbose("Done WriteStateAsync for {0} grain: {1} eTag: {2}", stateStore, grainStoreKey, grainState.ETag);
     return Task.FromResult(grainState.ETag);
 }

 /// <summary>
 /// Reads persisted state from the backing store and deserializes it into the the target
 /// grain state object.
 /// </summary>
 /// <param name="grainType">A string holding the name of the grain class.</param>
 /// <param name="grainReference">Represents the long-lived identity of the grain.</param>
 /// <param name="grainState">A reference to an object to hold the persisted state of the grain.</param>
 /// <returns>Completion promise for this operation.</returns>
 public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
 {
     if (DataManager == null) throw new ArgumentException("DataManager property not initialized");
     var entityData = await DataManager.Read(grainState.GetType().Name, grainReference.ToKeyString());
     if (entityData != null)
     {
         ConvertFromStorageFormat(grainState, entityData);
     }
 }

        public Task ClearStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            if (!(grainState is IAggregateState))
                throw new NotAggregateStateException(grainState.GetType());

            var state = grainState as IAggregateState;
            var stream = this.GetStreamName(grainType, grainReference);

            return this.Connection.DeleteStreamAsync(stream, state.Version);
        }

 public async Task WriteStateAsync(string grainType, GrainReference grainId, IGrainState grainState)
 {
     try
     {
         var blobName = BlobStorageProvider.GetBlobName(grainType, grainId);
         var storedData = JsonConvert.SerializeObject(grainState.AsDictionary());
         var blob = container.GetBlockBlobReference(blobName);
         await blob.UploadTextAsync(storedData);
     }
     catch (Exception ex)
     {
         Log.Error(0, ex.ToString());
     }
 }

        public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            var stateName = grainState.GetType().Name;
            var key = grainReference.ToKeyString();
            var id = string.Format(CultureInfo.InvariantCulture, "{0}/{1}", stateName, key);

            using (IAsyncDocumentSession session = this.documentStore.OpenAsyncSession())
            {
                var state = await session.LoadAsync<RavenJObject>(id);
                if (state != null)
                {
                    grainState.SetAll(state.ToDictionary(x => x.Key, x => x.Value.Value<object>()));
                }
            }
        }

		public Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
		{
			var entity = new DynamicTableEntity(grainReference.ToKeyString(), grainType) { ETag = "*" };

			var serializer = new JsonSerializer();
			using (var memoryStream = new MemoryStream())
			{
				using (var bsonWriter = new BsonWriter(memoryStream))
				{
					serializer.Serialize(bsonWriter, grainState.AsDictionary());

					SplitBinaryData(entity, memoryStream.ToArray());
				}
			}

			return _table.ExecuteAsync(TableOperation.InsertOrReplace(entity));
		}

        public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            try
            {
                var collection = await this.EnsureCollection(grainType);
                var documents = await this.Client.ReadDocumentFeedAsync(collection.DocumentsLink);
                var documentId = grainReference.ToKeyString();
                GrainStateDocument document = documents.Where(d => d.Id == documentId).FirstOrDefault();

                if(document != null)
                    grainState.SetAll(document.State);
            }
            catch (Exception ex)
            {
                Log.Error(0, "Error in ReadStateAsync", ex);
            }            
        }

        /// <summary> Write state data function for this storage provider. </summary>
        /// <see cref="IStorageProvider.WriteStateAsync"/>
        public async Task WriteStateAsync(string grainType, GrainReference grainId, IGrainState grainState)
        {
            var blobName = GetBlobName(grainType, grainId);
            try
            {
                if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_Storage_Writing, "Writing: GrainType={0} Grainid={1} ETag={2} to BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);

                var json = JsonConvert.SerializeObject(grainState.State, settings);

                var blob = container.GetBlockBlobReference(blobName);
                blob.Properties.ContentType = "application/json";

                var containerNotFound = false;
                try
                {
                    await blob.UploadTextAsync(
                            json,
                            Encoding.UTF8,
                            AccessCondition.GenerateIfMatchCondition(grainState.ETag),
                            null,
                            null).ConfigureAwait(false);
                }
                catch (StorageException exception)
                {
                    var errorCode = exception.RequestInformation.ExtendedErrorInformation.ErrorCode;
                    containerNotFound = errorCode == BlobErrorCodeStrings.ContainerNotFound;
                }
                if (containerNotFound)
                {
                    // if the container does not exist, create it, and make another attempt
                    if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_ContainerNotFound, "Creating container: GrainType={0} Grainid={1} ETag={2} to BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
                    await container.CreateIfNotExistsAsync().ConfigureAwait(false);

                    await blob.UploadTextAsync(
                        json,
                        Encoding.UTF8,
                        AccessCondition.GenerateIfMatchCondition(grainState.ETag),
                        null,
                        null).ConfigureAwait(false);
                }

                grainState.ETag = blob.Properties.ETag;

                if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_Storage_DataRead, "Written: GrainType={0} Grainid={1} ETag={2} to BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
            }
            catch (Exception ex)
            {
                Log.Error((int)AzureProviderErrorCode.AzureBlobProvider_WriteError,
                    string.Format("Error writing: GrainType={0} Grainid={1} ETag={2} to BlobName={3} in Container={4} Exception={5}", grainType, grainId, grainState.ETag, blobName, container.Name, ex.Message),
                    ex);
            }
        }

        /// <summary> Clear / Delete state data function for this storage provider. </summary>
        /// <see cref="IStorageProvider.ClearStateAsync"/>
        public async Task ClearStateAsync(string grainType, GrainReference grainId, IGrainState grainState)
        {
            var blobName = GetBlobName(grainType, grainId);
            try
            {
                if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_ClearingData, "Clearing: GrainType={0} Grainid={1} ETag={2} BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);

                var blob = container.GetBlockBlobReference(blobName);
                await blob.DeleteIfExistsAsync(
                        DeleteSnapshotsOption.None,
                        AccessCondition.GenerateIfMatchCondition(grainState.ETag),
                        null,
                        null).ConfigureAwait(false);
                grainState.ETag = blob.Properties.ETag;

                if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_Cleared, "Cleared: GrainType={0} Grainid={1} ETag={2} BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
            }
            catch (Exception ex)
            {
                Log.Error((int)AzureProviderErrorCode.AzureBlobProvider_ClearError,
                  string.Format("Error clearing: GrainType={0} Grainid={1} ETag={2} BlobName={3} in Container={4} Exception={5}", grainType, grainId, grainState.ETag, blobName, container.Name, ex.Message),
                  ex);
            }
        }

 /// <summary>
 /// Deserialize from Azure storage format
 /// </summary>
 /// <param name="grainState">The grain state data to be deserialized in to</param>
 /// <param name="entity">The Azure table entity the stored data</param>
 internal void ConvertFromStorageFormat(IGrainState grainState, GrainStateEntity entity)
 {
     Dictionary<string, object> dataValues = null;
     try
     {
         if (entity.Data != null)
         {
             // Rehydrate
             dataValues = SerializationManager.DeserializeFromByteArray<Dictionary<string, object>>(entity.Data);
         }
         else if (entity.StringData != null)
         {
             dataValues = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, object>>(entity.StringData, jsonSettings);
         }
         if (dataValues != null)
         {
             grainState.SetAll(dataValues);
         }
         // Else, no data found
     }
     catch (Exception exc)
     {
         var sb = new StringBuilder();
         if (entity.Data != null)
         {
             sb.AppendFormat("Unable to convert from storage format GrainStateEntity.Data={0}", entity.Data);
         }
         else if (entity.StringData != null)
         {
             sb.AppendFormat("Unable to convert from storage format GrainStateEntity.StringData={0}", entity.StringData);
         }
         if (dataValues != null)
         {
             int i = 1;
             foreach (var dvKey in dataValues.Keys)
             {
                 object dvValue = dataValues[dvKey];
                 sb.AppendLine();
                 sb.AppendFormat("Data #{0} Key={1} Value={2} Type={3}", i, dvKey, dvValue, dvValue.GetType());
                 i++;
             }
         }
         Log.Error(0, sb.ToString(), exc);
         throw new AggregateException(sb.ToString(), exc);
     }
 }

        /// <summary> Read state data function for this storage provider. </summary>
        /// <see cref="IStorageProvider.ReadStateAsync"/>
        public async Task ReadStateAsync(string grainType, GrainReference grainId, IGrainState grainState)
        {
            var blobName = GetBlobName(grainType, grainId);
            if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_Storage_Reading, "Reading: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);

            try
            {
                var blob = container.GetBlockBlobReference(blobName);

                string json;

                try
                {
                    json = await blob.DownloadTextAsync().ConfigureAwait(false);
                }
                catch (StorageException exception)
                {
                    var errorCode = exception.RequestInformation.ExtendedErrorInformation.ErrorCode;
                    if (errorCode == BlobErrorCodeStrings.BlobNotFound)
                    {
                        if (this.Log.IsVerbose2) this.Log.Verbose2((int)AzureProviderErrorCode.AzureBlobProvider_BlobNotFound, "BlobNotFound reading: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
                        return;
                    }
                    if (errorCode == BlobErrorCodeStrings.ContainerNotFound)
                    {
                        if (this.Log.IsVerbose2) this.Log.Verbose2((int)AzureProviderErrorCode.AzureBlobProvider_ContainerNotFound, "ContainerNotFound reading: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
                        return;
                    }

                    throw;
                }

                if (string.IsNullOrWhiteSpace(json))
                {
                    if (this.Log.IsVerbose2) this.Log.Verbose2((int)AzureProviderErrorCode.AzureBlobProvider_BlobEmpty, "BlobEmpty reading: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
                    return;
                }

                grainState.State = JsonConvert.DeserializeObject(json, grainState.State.GetType(), settings);
                grainState.ETag = blob.Properties.ETag;

                if (this.Log.IsVerbose3) this.Log.Verbose3((int)AzureProviderErrorCode.AzureBlobProvider_Storage_DataRead, "Read: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4}", grainType, grainId, grainState.ETag, blobName, container.Name);
            }
            catch (Exception ex)
            {
                Log.Error((int)AzureProviderErrorCode.AzureBlobProvider_ReadError,
                    string.Format("Error reading: GrainType={0} Grainid={1} ETag={2} from BlobName={3} in Container={4} Exception={5}", grainType, grainId, grainState.ETag, blobName, container.Name, ex.Message),
                    ex);
            }
        }