protected IChunk ReadChunk(DbDataReader reader)
{
var chunk = new SqlChunk
{
Position = reader.GetInt64(0),
PartitionId = reader.GetString(1),
Index = reader.GetInt64(2),
OperationId = reader.GetString(4),
SerializerInfo = reader.GetString(5),
};
chunk.Payload = Options.Serializer.Deserialize
(
reader.GetFieldValue <byte[]>(3),
chunk.SerializerInfo
);
return(chunk);
}
public async Task <IChunk> AppendAsync(
string partitionId,
long index,
object payload,
string operationId,
CancellationToken cancellationToken)
{
try
{
if (index == -1)
{
index = GenerateIndex();
}
var chunk = new SqlChunk()
{
PartitionId = partitionId,
Index = index,
Payload = payload,
OperationId = operationId ?? Guid.NewGuid().ToString()
};
var bytes = Options.Serializer.Serialize(payload, out string serializerInfo);
chunk.SerializerInfo = serializerInfo;
var sql = Options.GetInsertChunkSql();
using (var context = await Options.GetContextAsync(cancellationToken).ConfigureAwait(false))
{
using (var command = context.CreateCommand(sql))
{
context.AddParam(command, "@PartitionId", partitionId);
context.AddParam(command, "@Index", index);
context.AddParam(command, "@OperationId", chunk.OperationId);
context.AddParam(command, "@Payload", bytes);
context.AddParam(command, "@SerializerInfo", serializerInfo);
chunk.Position =
(long)await command.ExecuteScalarAsync(cancellationToken).ConfigureAwait(false);
}
}
return(chunk);
}
catch (Exception ex)
{
if (IsDuplicatedStreamIndex(ex))
{
throw new DuplicateStreamIndexException(partitionId, index);
}
if (IsDuplicatedStreamOperation(ex))
{
_logger.LogInformation(
$"Skipped duplicated chunk on '{partitionId}' by operation id '{operationId}'");
return(null);
}
_logger.LogError(ex.Message);
throw;
}
}
