#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2017 Max Oberberger (max@oberbergers.de)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

from . import http_loader
from . import mogilefs_loader
from tornado.concurrent import return_future

@return_future
def load(context, path, callback):
    def callback_wrapper(result):
        if result.successful:
            callback(result)
        else:
            # If mogilefs_loader failed try http_loader
            http_loader.load(context, path, callback)

    # First attempt to load with mogilefs_loader
    mogilefs_loader.load(context, path, callback_wrapper)
