private bool IsSqlEditionSupported(string connectionString)
{
var operation = new DbOperation(connectionString, "SELECT SERVERPROPERTY ( 'EngineEdition' )", _logger);
var edition = (int)operation.ExecuteScalar();
return(edition >= SqlEngineEdition.Standard && edition <= SqlEngineEdition.Express);
}
private void Receive(object state)
{
var tcs = (TaskCompletionSource <object>)state;
if (!_lastPayloadId.HasValue)
{
var lastPayloadIdOperation = new DbOperation(_connectionString, _maxIdSql, _logger)
{
LoggerPrefix = _loggerPrefix
};
try
{
_lastPayloadId = (long?)lastPayloadIdOperation.ExecuteScalar();
Queried();
_logger.LogDebug(String.Format("{0}SqlReceiver started, initial payload id={1}", _loggerPrefix, _lastPayloadId));
// Complete the StartReceiving task as we've successfully initialized the payload ID
tcs.TrySetResult(null);
}
catch (Exception ex)
{
_logger.LogError(String.Format("{0}SqlReceiver error starting: {1}", _loggerPrefix, ex));
tcs.TrySetException(ex);
return;
}
}
// NOTE: This is called from a BG thread so any uncaught exceptions will crash the process
lock (this)
{
if (_disposed)
{
return;
}
var parameter = _dbProviderFactory.CreateParameter();
parameter.ParameterName = "PayloadId";
parameter.Value = _lastPayloadId.Value;
_dbOperation = new ObservableDbOperation(_connectionString, _selectSql, _logger, parameter)
{
LoggerPrefix = _loggerPrefix
};
}
_dbOperation.Queried += () => Queried();
_dbOperation.Faulted += ex => Faulted(ex);
#if NET451
_dbOperation.Changed += () =>
{
_logger.LogInformation("{0}Starting receive loop again to process updates", _loggerPrefix);
_dbOperation.ExecuteReaderWithUpdates(ProcessRecord);
};
#endif
_logger.LogDebug(String.Format("{0}Executing receive reader, initial payload ID parameter={1}", _loggerPrefix, _dbOperation.Parameters[0].Value));
_dbOperation.ExecuteReaderWithUpdates(ProcessRecord);
_logger.LogInformation("{0}SqlReceiver.Receive returned", _loggerPrefix);
}