congress/congress/service.py

53 lines
1.6 KiB
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.
from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import functools
import json
import sys
from oslo_log import log as logging
from congress.api import application
from congress import harness
LOG = logging.getLogger(__name__)
def fail_gracefully(f):
"""Logs exceptions and aborts."""
@functools.wraps(f)
def wrapper(*args, **kw):
try:
return f(*args, **kw)
except Exception:
LOG.exception("Fatal Exception:")
sys.exit(1)
return wrapper
@fail_gracefully
def congress_app_factory(global_conf, **local_conf):
# global_conf only accepts an iteratable value as its dict value
flags_dict = json.loads(global_conf['flags'])
services = harness.create2(
node_id=global_conf['node_id'],
bus_id=global_conf['bus_id'],
policy_engine=flags_dict['policy_engine'],
api=flags_dict['api'],
datasources=flags_dict['datasources'])
return application.ApiApplication(services['api_service'])