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# ================================================================================
# Copyright (c) 2017-2019 AT&T Intellectual Property. All rights reserved.
# ================================================================================
# 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.
# ============LICENSE_END=========================================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
import json
import os
import requests
from onap_dcae_cbs_docker_client import get_module_logger
from onap_dcae_cbs_docker_client.exceptions import ENVsMissing, CantGetConfig, CBSUnreachable
logger = get_module_logger(__name__)
#########
# HELPERS
def _get_path(path):
"""
Try to get the config, and return appropriate exceptions otherwise
"""
try:
hostname = os.environ["HOSTNAME"] # this is the name of the component itself
# in most cases, this is the K8s service name which is a resolvable DNS name
# if running outside k8s, this name needs to be resolvable by DNS via other means.
cbs_resolvable_hostname = os.environ["CONFIG_BINDING_SERVICE"]
except KeyError as e:
raise ENVsMissing("Required ENV Variable {0} missing".format(e))
# TODO: https
cbs_url = "http://{0}:10000".format(cbs_resolvable_hostname)
# get my config
try:
my_config_endpoint = "{0}/{1}/{2}".format(cbs_url, path, hostname)
res = requests.get(my_config_endpoint)
res.raise_for_status()
config = res.json()
logger.debug(
"get_config returned the following configuration: %s using the config url %s",
json.dumps(config),
my_config_endpoint,
)
return config
except requests.exceptions.HTTPError: # this is thrown by raise_for_status
logger.error(
"The config binding service endpoint %s returned a bad status. code: %d, text: %s",
my_config_endpoint,
res.status_code,
res.text,
)
raise CantGetConfig(res.status_code, res.text)
except requests.exceptions.ConnectionError: # this is thrown if requests.get cant even connect to the endpoint
raise CBSUnreachable()
#########
# Public
def get_all():
"""
Hit the CBS service_component_all endpoint
"""
return _get_path("service_component_all")
def get_config():
"""
Hit the CBS service_component endpoint
TODO: should we take in a "retry" boolean, and retry on behalf of the caller?
Currently, we return an exception and let the application decide how it wants to proceed (Crash, try again, etc).
"""
return _get_path("service_component")
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