protected virtual IEnumerable <T> ExecuteQuery <T>(string streamId, Func <IDbStatement, IEnumerable <T> > query)
{
ThrowWhenDisposed();
streamId = streamId.ToHash();
TransactionScope scope = OpenQueryScope();
IDbConnection connection = null;
IDbTransaction transaction = null;
IDbStatement statement = null;
try
{
connection = _connectionFactory.OpenReplica(streamId);
transaction = _dialect.OpenTransaction(connection);
statement = _dialect.BuildStatement(scope, connection, transaction);
statement.PageSize = _pageSize;
Logger.Verbose(Messages.ExecutingQuery);
return(query(statement));
}
catch (Exception e)
{
if (statement != null)
{
statement.Dispose();
}
if (transaction != null)
{
transaction.Dispose();
}
if (connection != null)
{
connection.Dispose();
}
if (scope != null)
{
scope.Dispose();
}
Logger.Debug(Messages.StorageThrewException, e.GetType());
if (e is StorageUnavailableException)
{
throw;
}
throw new StorageException(e.Message, e);
}
}