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DynamoDBGrainStorage.cs
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DynamoDBGrainStorage.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Amazon.DynamoDBv2;
using Amazon.DynamoDBv2.Model;
using Newtonsoft.Json;
using Orleans.Configuration;
using Orleans.Persistence.DynamoDB;
using Orleans.Runtime;
using Orleans.Serialization;
namespace Orleans.Storage
{
/// <summary>
/// Dynamo DB storage Provider.
/// Persist Grain State in a DynamoDB table either in Json or Binary format.
/// </summary>
public class DynamoDBGrainStorage : IGrainStorage, ILifecycleParticipant<ISiloLifecycle>
{
private const int MAX_DATA_SIZE = 400 * 1024;
private const string GRAIN_REFERENCE_PROPERTY_NAME = "GrainReference";
private const string STRING_STATE_PROPERTY_NAME = "StringState";
private const string BINARY_STATE_PROPERTY_NAME = "BinaryState";
private const string GRAIN_TYPE_PROPERTY_NAME = "GrainType";
private const string ETAG_PROPERTY_NAME = "ETag";
private const string GRAIN_TTL_PROPERTY_NAME = "GrainTtl";
private const string CURRENT_ETAG_ALIAS = ":currentETag";
private readonly DynamoDBStorageOptions options;
private readonly SerializationManager serializationManager;
private readonly ILogger logger;
private readonly IGrainFactory grainFactory;
private readonly ITypeResolver typeResolver;
private readonly string name;
private DynamoDBStorage storage;
private JsonSerializerSettings jsonSettings;
/// <summary>
/// Default Constructor
/// </summary>
public DynamoDBGrainStorage(
string name,
DynamoDBStorageOptions options,
SerializationManager serializationManager,
IGrainFactory grainFactory,
ITypeResolver typeResolver,
ILogger<DynamoDBGrainStorage> logger)
{
this.name = name;
this.logger = logger;
this.options = options;
this.serializationManager = serializationManager;
this.grainFactory = grainFactory;
this.typeResolver = typeResolver;
}
public void Participate(ISiloLifecycle lifecycle)
{
lifecycle.Subscribe(OptionFormattingUtilities.Name<DynamoDBGrainStorage>(this.name), this.options.InitStage, Init, Close);
}
/// <summary> Initialization function for this storage provider. </summary>
public async Task Init(CancellationToken ct)
{
var stopWatch = Stopwatch.StartNew();
try
{
var initMsg = string.Format("Init: Name={0} ServiceId={1} Table={2} DeleteStateOnClear={3}",
this.name, this.options.ServiceId, this.options.TableName, this.options.DeleteStateOnClear);
this.jsonSettings = OrleansJsonSerializer.UpdateSerializerSettings(
OrleansJsonSerializer.GetDefaultSerializerSettings(this.typeResolver, this.grainFactory),
this.options.UseFullAssemblyNames, this.options.IndentJson, this.options.TypeNameHandling);
this.options.ConfigureJsonSerializerSettings?.Invoke(this.jsonSettings);
this.logger.LogInformation((int)ErrorCode.StorageProviderBase, $"AWS DynamoDB Grain Storage {this.name} is initializing: {initMsg}");
this.storage = new DynamoDBStorage(this.logger, this.options.Service, this.options.AccessKey, this.options.SecretKey,
this.options.ReadCapacityUnits, this.options.WriteCapacityUnits, this.options.UseProvisionedThroughput,
this.options.CreateIfNotExists, this.options.UpdateIfExists);
await storage.InitializeTable(this.options.TableName,
new List<KeySchemaElement>
{
new KeySchemaElement { AttributeName = GRAIN_REFERENCE_PROPERTY_NAME, KeyType = KeyType.HASH },
new KeySchemaElement { AttributeName = GRAIN_TYPE_PROPERTY_NAME, KeyType = KeyType.RANGE }
},
new List<AttributeDefinition>
{
new AttributeDefinition { AttributeName = GRAIN_REFERENCE_PROPERTY_NAME, AttributeType = ScalarAttributeType.S },
new AttributeDefinition { AttributeName = GRAIN_TYPE_PROPERTY_NAME, AttributeType = ScalarAttributeType.S }
},
secondaryIndexes: null,
ttlAttributeName: this.options.TimeToLive.HasValue ? GRAIN_TTL_PROPERTY_NAME : null);
stopWatch.Stop();
this.logger.LogInformation((int)ErrorCode.StorageProviderBase,
$"Initializing provider {this.name} of type {this.GetType().Name} in stage {this.options.InitStage} took {stopWatch.ElapsedMilliseconds} Milliseconds.");
}
catch (Exception exc)
{
stopWatch.Stop();
this.logger.LogError((int)ErrorCode.Provider_ErrorFromInit, $"Initialization failed for provider {this.name} of type {this.GetType().Name} in stage {this.options.InitStage} in {stopWatch.ElapsedMilliseconds} Milliseconds.", exc);
throw;
}
}
/// <summary> Shutdown this storage provider. </summary>
public Task Close(CancellationToken ct) => Task.CompletedTask;
/// <summary> Read state data function for this storage provider. </summary>
/// <see cref="IGrainStorage.ReadStateAsync"/>
public async Task ReadStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
if (this.storage == null) throw new ArgumentException("GrainState-Table property not initialized");
string partitionKey = GetKeyString(grainReference);
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.Trace(ErrorCode.StorageProviderBase,
"Reading: GrainType={0} Pk={1} Grainid={2} from Table={3}",
grainType, partitionKey, grainReference, this.options.TableName);
string rowKey = AWSUtils.ValidateDynamoDBRowKey(grainType);
var record = await this.storage.ReadSingleEntryAsync(this.options.TableName,
new Dictionary<string, AttributeValue>
{
{ GRAIN_REFERENCE_PROPERTY_NAME, new AttributeValue(partitionKey) },
{ GRAIN_TYPE_PROPERTY_NAME, new AttributeValue(rowKey) }
},
(fields) =>
{
return new GrainStateRecord
{
GrainType = fields[GRAIN_TYPE_PROPERTY_NAME].S,
GrainReference = fields[GRAIN_REFERENCE_PROPERTY_NAME].S,
ETag = int.Parse(fields[ETAG_PROPERTY_NAME].N),
BinaryState = fields.ContainsKey(BINARY_STATE_PROPERTY_NAME) ? fields[BINARY_STATE_PROPERTY_NAME].B.ToArray() : null,
StringState = fields.ContainsKey(STRING_STATE_PROPERTY_NAME) ? fields[STRING_STATE_PROPERTY_NAME].S : string.Empty
};
}).ConfigureAwait(false);
if (record != null)
{
var loadedState = ConvertFromStorageFormat(record, grainState.Type);
grainState.RecordExists = loadedState != null;
grainState.State = loadedState ?? Activator.CreateInstance(grainState.Type);
grainState.ETag = record.ETag.ToString();
}
// Else leave grainState in previous default condition
}
/// <summary> Write state data function for this storage provider. </summary>
/// <see cref="IGrainStorage.WriteStateAsync"/>
public async Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
if (this.storage == null) throw new ArgumentException("GrainState-Table property not initialized");
string partitionKey = GetKeyString(grainReference);
string rowKey = AWSUtils.ValidateDynamoDBRowKey(grainType);
var record = new GrainStateRecord { GrainReference = partitionKey, GrainType = rowKey };
try
{
ConvertToStorageFormat(grainState.State, record);
await WriteStateInternal(grainState, record);
}
catch (ConditionalCheckFailedException exc)
{
throw new InconsistentStateException("Invalid grain state", exc);
}
catch (Exception exc)
{
this.logger.Error(ErrorCode.StorageProviderBase,
string.Format("Error Writing: GrainType={0} Grainid={1} ETag={2} to Table={3} Exception={4}",
grainType, grainReference, grainState.ETag, this.options.TableName, exc.Message), exc);
throw;
}
}
private async Task WriteStateInternal(IGrainState grainState, GrainStateRecord record, bool clear = false)
{
var fields = new Dictionary<string, AttributeValue>();
if (this.options.TimeToLive.HasValue)
{
fields.Add(GRAIN_TTL_PROPERTY_NAME, new AttributeValue { N = ((DateTimeOffset)DateTime.UtcNow.Add(this.options.TimeToLive.Value)).ToUnixTimeSeconds().ToString() });
}
if (record.BinaryState != null && record.BinaryState.Length > 0)
{
fields.Add(BINARY_STATE_PROPERTY_NAME, new AttributeValue { B = new MemoryStream(record.BinaryState) });
}
else if (!string.IsNullOrWhiteSpace(record.StringState))
{
fields.Add(STRING_STATE_PROPERTY_NAME, new AttributeValue(record.StringState));
}
int newEtag = 0;
if (clear)
{
fields.Add(GRAIN_REFERENCE_PROPERTY_NAME, new AttributeValue(record.GrainReference));
fields.Add(GRAIN_TYPE_PROPERTY_NAME, new AttributeValue(record.GrainType));
int currentEtag = 0;
int.TryParse(grainState.ETag, out currentEtag);
newEtag = currentEtag;
fields.Add(ETAG_PROPERTY_NAME, new AttributeValue { N = newEtag++.ToString() });
await this.storage.PutEntryAsync(this.options.TableName, fields).ConfigureAwait(false);
}
else if (string.IsNullOrWhiteSpace(grainState.ETag))
{
fields.Add(GRAIN_REFERENCE_PROPERTY_NAME, new AttributeValue(record.GrainReference));
fields.Add(GRAIN_TYPE_PROPERTY_NAME, new AttributeValue(record.GrainType));
fields.Add(ETAG_PROPERTY_NAME, new AttributeValue { N = "0" });
var expression = $"attribute_not_exists({GRAIN_REFERENCE_PROPERTY_NAME}) AND attribute_not_exists({GRAIN_TYPE_PROPERTY_NAME})";
await this.storage.PutEntryAsync(this.options.TableName, fields, expression).ConfigureAwait(false);
}
else
{
var keys = new Dictionary<string, AttributeValue>();
keys.Add(GRAIN_REFERENCE_PROPERTY_NAME, new AttributeValue(record.GrainReference));
keys.Add(GRAIN_TYPE_PROPERTY_NAME, new AttributeValue(record.GrainType));
int currentEtag = 0;
int.TryParse(grainState.ETag, out currentEtag);
newEtag = currentEtag;
newEtag++;
fields.Add(ETAG_PROPERTY_NAME, new AttributeValue { N = newEtag.ToString() });
var conditionalValues = new Dictionary<string, AttributeValue> { { CURRENT_ETAG_ALIAS, new AttributeValue { N = currentEtag.ToString() } } };
var expression = $"{ETAG_PROPERTY_NAME} = {CURRENT_ETAG_ALIAS}";
await this.storage.UpsertEntryAsync(this.options.TableName, keys, fields, expression, conditionalValues).ConfigureAwait(false);
}
grainState.ETag = newEtag.ToString();
grainState.RecordExists = !clear;
}
/// <summary> Clear / Delete state data function for this storage provider. </summary>
/// <remarks>
/// If the <c>DeleteStateOnClear</c> is set to <c>true</c> then the table row
/// for this grain will be deleted / removed, otherwise the table row will be
/// cleared by overwriting with default / null values.
/// </remarks>
/// <see cref="IGrainStorage.ClearStateAsync"/>
public async Task ClearStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
{
if (this.storage == null) throw new ArgumentException("GrainState-Table property not initialized");
string partitionKey = GetKeyString(grainReference);
if (this.logger.IsEnabled(LogLevel.Trace))
{
this.logger.Trace(ErrorCode.StorageProviderBase,
"Clearing: GrainType={0} Pk={1} Grainid={2} ETag={3} DeleteStateOnClear={4} from Table={5}",
grainType, partitionKey, grainReference, grainState.ETag, this.options.DeleteStateOnClear, this.options.TableName);
}
string rowKey = AWSUtils.ValidateDynamoDBRowKey(grainType);
var record = new GrainStateRecord { GrainReference = partitionKey, ETag = string.IsNullOrWhiteSpace(grainState.ETag) ? 0 : int.Parse(grainState.ETag), GrainType = rowKey };
var operation = "Clearing";
try
{
if (this.options.DeleteStateOnClear)
{
operation = "Deleting";
var keys = new Dictionary<string, AttributeValue>();
keys.Add(GRAIN_REFERENCE_PROPERTY_NAME, new AttributeValue(record.GrainReference));
keys.Add(GRAIN_TYPE_PROPERTY_NAME, new AttributeValue(record.GrainType));
await this.storage.DeleteEntryAsync(this.options.TableName, keys).ConfigureAwait(false);
grainState.ETag = string.Empty;
}
else
{
await WriteStateInternal(grainState, record, true);
}
}
catch (Exception exc)
{
this.logger.Error(ErrorCode.StorageProviderBase, string.Format("Error {0}: GrainType={1} Grainid={2} ETag={3} from Table={4} Exception={5}",
operation, grainType, grainReference, grainState.ETag, this.options.TableName, exc.Message), exc);
throw;
}
}
internal class GrainStateRecord
{
public string GrainReference { get; set; } = "";
public string GrainType { get; set; } = "";
public byte[] BinaryState { get; set; }
public string StringState { get; set; }
public int ETag { get; set; }
}
private string GetKeyString(GrainReference grainReference)
{
var key = string.Format("{0}_{1}", this.options.ServiceId, grainReference.ToKeyString());
return AWSUtils.ValidateDynamoDBPartitionKey(key);
}
internal object ConvertFromStorageFormat(GrainStateRecord entity, Type stateType)
{
var binaryData = entity.BinaryState;
var stringData = entity.StringState;
object dataValue = null;
try
{
if (binaryData?.Length > 0)
{
// Rehydrate
dataValue = this.serializationManager.DeserializeFromByteArray<object>(binaryData);
}
else if (!string.IsNullOrEmpty(stringData))
{
dataValue = JsonConvert.DeserializeObject(stringData, stateType, this.jsonSettings);
}
// Else, no data found
}
catch (Exception exc)
{
var sb = new StringBuilder();
if (binaryData?.Length > 0)
{
sb.AppendFormat("Unable to convert from storage format GrainStateEntity.Data={0}", binaryData);
}
else if (!string.IsNullOrEmpty(stringData))
{
sb.AppendFormat("Unable to convert from storage format GrainStateEntity.StringData={0}", stringData);
}
if (dataValue != null)
{
sb.AppendFormat("Data Value={0} Type={1}", dataValue, dataValue.GetType());
}
this.logger.Error(0, sb.ToString(), exc);
throw new AggregateException(sb.ToString(), exc);
}
return dataValue;
}
internal void ConvertToStorageFormat(object grainState, GrainStateRecord entity)
{
int dataSize;
if (this.options.UseJson)
{
// http://james.newtonking.com/json/help/index.html?topic=html/T_Newtonsoft_Json_JsonConvert.htm
entity.StringState = JsonConvert.SerializeObject(grainState, this.jsonSettings);
dataSize = STRING_STATE_PROPERTY_NAME.Length + entity.StringState.Length;
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.Trace("Writing JSON data size = {0} for grain id = Partition={1} / Row={2}",
dataSize, entity.GrainReference, entity.GrainType);
}
else
{
// Convert to binary format
entity.BinaryState = this.serializationManager.SerializeToByteArray(grainState);
dataSize = BINARY_STATE_PROPERTY_NAME.Length + entity.BinaryState.Length;
if (this.logger.IsEnabled(LogLevel.Trace)) this.logger.Trace("Writing binary data size = {0} for grain id = Partition={1} / Row={2}",
dataSize, entity.GrainReference, entity.GrainType);
}
var pkSize = GRAIN_REFERENCE_PROPERTY_NAME.Length + entity.GrainReference.Length;
var rkSize = GRAIN_TYPE_PROPERTY_NAME.Length + entity.GrainType.Length;
var versionSize = ETAG_PROPERTY_NAME.Length + entity.ETag.ToString().Length;
if ((pkSize + rkSize + versionSize + dataSize) > MAX_DATA_SIZE)
{
var msg = string.Format("Data too large to write to DynamoDB table. Size={0} MaxSize={1}", dataSize, MAX_DATA_SIZE);
throw new ArgumentOutOfRangeException("GrainState.Size", msg);
}
}
}
public static class DynamoDBGrainStorageFactory
{
public static IGrainStorage Create(IServiceProvider services, string name)
{
var optionsMonitor = services.GetRequiredService<IOptionsMonitor<DynamoDBStorageOptions>>();
return ActivatorUtilities.CreateInstance<DynamoDBGrainStorage>(services, optionsMonitor.Get(name), name);
}
}
}