internal override object BuildSagaData(CommandWrapper command, RuntimeSagaInfo sagaInfo, IContainSagaData sagaData)
{
var writer = command.LeaseWriter();
sagaInfo.ToJson(sagaData, writer);
return(writer.ToCharSegment());
}
static void ValidatePropertyName <TSagaData>(string propertyName, RuntimeSagaInfo sagaInfo) where TSagaData : IContainSagaData
{
if (!sagaInfo.HasCorrelationProperty)
{
throw new Exception($"Cannot retrieve a {typeof(TSagaData).FullName} using property \'{propertyName}\'. The saga has no correlation property.");
}
if (propertyName != sagaInfo.CorrelationProperty)
{
throw new Exception($"Cannot retrieve a {typeof(TSagaData).FullName} using property \'{propertyName}\'. Can only be retrieve using the correlation property '{sagaInfo.CorrelationProperty}'");
}
}
static void AddTransitionalParameter(IContainSagaData sagaData, RuntimeSagaInfo sagaInfo, CommandWrapper command)
{
if (!sagaInfo.HasTransitionalCorrelationProperty)
{
return;
}
var transitionalId = sagaInfo.TransitionalAccessor(sagaData);
if (transitionalId == null)
{
//TODO: validate non default for value types
throw new Exception($"Null transitionalCorrelationProperty is not allowed. SagaDataType: {sagaData.GetType().FullName}.");
}
command.AddParameter("TransitionalCorrelationId", transitionalId);
}
internal virtual object BuildSagaData(CommandWrapper command, RuntimeSagaInfo sagaInfo, IContainSagaData sagaData)
{
return(sagaInfo.ToJson(sagaData));
}
static async Task <Concurrency <TSagaData> > GetSagaData <TSagaData>(SynchronizedStorageSession session, string commandText, RuntimeSagaInfo sagaInfo, ParameterAppender appendParameters)
where TSagaData : class, IContainSagaData
{
var sqlSession = session.SqlPersistenceSession();
using (var command = sagaInfo.CreateCommand(sqlSession.Connection))
{
command.CommandText = commandText;
command.Transaction = sqlSession.Transaction;
var dbCommand = command.InnerCommand;
appendParameters(dbCommand.CreateParameter, parameter => dbCommand.Parameters.Add(parameter));
// to avoid loading into memory SequentialAccess is required which means each fields needs to be accessed
using (var dataReader = await command.ExecuteReaderAsync(CommandBehavior.SingleRow | CommandBehavior.SequentialAccess).ConfigureAwait(false))
{
if (!await dataReader.ReadAsync().ConfigureAwait(false))
{
return(default);
static async Task <Concurrency <TSagaData> > GetSagaData <TSagaData>(SynchronizedStorageSession session, string commandText, RuntimeSagaInfo sagaInfo, ParameterAppender appendParameters)
where TSagaData : IContainSagaData
{
var sqlSession = session.SqlPersistenceSession();
using (var command = sagaInfo.CreateCommand(sqlSession.Connection))
{
command.CommandText = commandText;
command.Transaction = sqlSession.Transaction;
var dbCommand = command.InnerCommand;
appendParameters(dbCommand.CreateParameter, parameter => dbCommand.Parameters.Add(parameter));
// to avoid loading into memory SequentialAccess is required which means each fields needs to be accessed
using (var dataReader = await command.ExecuteReaderAsync(CommandBehavior.SingleRow | CommandBehavior.SequentialAccess).ConfigureAwait(false))
{
if (!await dataReader.ReadAsync().ConfigureAwait(false))
{
return(new Concurrency <TSagaData>(default(TSagaData), 0));
}
var id = await dataReader.GetGuidAsync(0).ConfigureAwait(false);
var sagaTypeVersionString = await dataReader.GetFieldValueAsync <string>(1).ConfigureAwait(false);
var sagaTypeVersion = Version.Parse(sagaTypeVersionString);
var concurrency = await dataReader.GetFieldValueAsync <int>(2).ConfigureAwait(false);
ReadMetadata(dataReader, out var originator, out var originalMessageId);
using (var textReader = dataReader.GetTextReader(4))
{
var sagaData = sagaInfo.FromString <TSagaData>(textReader, sagaTypeVersion);
sagaData.Id = id;
sagaData.Originator = originator;
sagaData.OriginalMessageId = originalMessageId;
return(new Concurrency <TSagaData>(sagaData, concurrency));
}
}
}
}