#!/usr/bin/env python
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""
Bilean Engine Server.  This does the work of actually implementing the API
calls made by the user.  Normal communications is done via the bilean API
which then calls into this engine.
"""

import eventlet
eventlet.monkey_patch()

import os
import sys

# If ../bilean/__init__.py exists, add ../ to Python search path, so that
# it will override what happens to be installed in /usr/(local/)lib/python...
POSSIBLE_TOPDIR = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
                                   os.pardir,
                                   os.pardir))
if os.path.exists(os.path.join(POSSIBLE_TOPDIR, 'bilean', '__init__.py')):
    sys.path.insert(0, POSSIBLE_TOPDIR)

from bilean.common import consts
from bilean.common import messaging

from oslo_config import cfg
from oslo_i18n import _lazy
from oslo_log import log as logging
from oslo_service import service

_lazy.enable_lazy()

LOG = logging.getLogger('bilean.engine')


if __name__ == '__main__':
    logging.register_options(cfg.CONF)
    cfg.CONF(project='bilean', prog='bilean-engine')
    logging.setup(cfg.CONF, 'bilean-engine')
    logging.set_defaults()
    messaging.setup()

    from bilean.engine import service as engine

    srv = engine.EngineService(cfg.CONF.host, consts.ENGINE_TOPIC)
    launcher = service.launch(cfg.CONF, srv,
                              workers=cfg.CONF.num_engine_workers)
    launcher.wait()