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());
}
}
/// <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 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>()));
}
}
}
/// <summary>
/// Writes the persisted state from a grain state object into its backing store.
/// </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 holding the persisted state of the grain.</param>
/// <returns>Completion promise for this operation.</returns>
public Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
if (DataManager == null) throw new ArgumentException("DataManager property not initialized");
var entityData = ConvertToStorageFormat(grainState);
return DataManager.Write(grainState.GetType().Name, grainReference.ToKeyString(), entityData);
}
/// <summary>
/// Removes grain state from its backing store, if found.
/// </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">An object holding the persisted state of the grain.</param>
/// <returns></returns>
public Task ClearStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
if (DataManager == null) throw new ArgumentException("DataManager property not initialized");
DataManager.Delete(grainState.GetType().Name, grainReference.ToKeyString());
return TaskDone.Done;
}
/// <summary>
/// Constructs a grain state instance by deserializing a JSON document.
/// </summary>
/// <param name="grainState">Grain state to be populated for storage.</param>
/// <param name="entityData">JSON storage format representaiton of the grain state.</param>
protected static void ConvertFromStorageFormat(IGrainState grainState, string entityData)
{
object data = JsonConvert.DeserializeObject(entityData, grainState.GetType(), GrainStateMongoDataManager.JsonSetting);
var dict = ((IGrainState)data).AsDictionary();
grainState.SetAll(dict);
}
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;
}
var data = JsonConvert.DeserializeObject(json, grainState.GetType(), jsonSettings);
var dict = ((GrainState)data).AsDictionary();
grainState.SetAll(dict);
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);
}
}
/// <summary>
/// Constructs a grain state instance by deserializing a JSON document.
/// </summary>
/// <param name="grainState">Grain state to be populated for storage.</param>
/// <param name="entityData">JSON storage format representaiton of the grain state.</param>
protected static void ConvertFromStorageFormat(IGrainState grainState, string entityData)
{
var setting = new JsonSerializerSettings();
object data = JsonConvert.DeserializeObject(entityData, grainState.GetType());
var dict = ((IGrainState)data).AsDictionary();
grainState.SetAll(dict);
}
public async Task WriteStateAsync(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())
{
await session.StoreAsync(grainState, id);
await session.SaveChangesAsync();
}
}
/// <summary>
/// Constructs a grain state instance by deserializing a JSON document.
/// </summary>
/// <param name="grainState">Grain state to be populated for storage.</param>
/// <param name="entityData">JSON storage format representaiton of the grain state.</param>
protected static void ConvertFromStorageFormat(IGrainState grainState, string entityData)
{
JavaScriptSerializer deserializer = new JavaScriptSerializer();
object data = deserializer.Deserialize(entityData, grainState.GetType());
var dict = ((IGrainState)data).AsDictionary();
grainState.SetAll(dict);
}
public Task ClearStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
DataManager.Delete(grainState.GetType().Name, grainReference.ToKeyString());
return(TaskDone.Done);
}
public Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
var data = ConvertToStorageFormat(grainState);
return(DataManager.Write(grainState.GetType().Name, grainReference.ToKeyString(), data));
}
public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
var data = await DataManager.Read(grainState.GetType().Name, grainReference.ToKeyString());
ConvertFromStorageFormat(grainState, data);
}
