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# ============LICENSE_START=======================================================
# org.onap.dcae
# ================================================================================
# Copyright (c) 2017 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.
# Lifecycle interface calls for DockerContainer
import json
import uuid
import requests
from cloudify import ctx
from cloudify.decorators import operation
from cloudify.context import NODE_INSTANCE
from cloudify.exceptions import NonRecoverableError
from .discovery import discover_service_url
POLICY_ID = 'policy_id'
POLICY_REQUIRED = 'policy_required'
POLICY_BODY = 'policy_body'
DCAE_POLICY_TYPE = 'dcae.nodes.policy'
class PolicyHandler(object):
"""talk to policy-handler"""
SERVICE_NAME_POLICY_HANDLER = "policy_handler"
X_ECOMP_REQUESTID = 'X-ECOMP-RequestID'
_url = None
@staticmethod
def _lazy_init():
"""discover policy-handler"""
if PolicyHandler._url:
return
PolicyHandler._url = "{0}/policy_latest".format(
discover_service_url(PolicyHandler.SERVICE_NAME_POLICY_HANDLER)
)
@staticmethod
def get_latest_policy(policy_id):
"""retrieve the latest policy for policy_id from policy-handler"""
PolicyHandler._lazy_init()
ph_path = "{0}/{1}".format(PolicyHandler._url, policy_id)
headers = {PolicyHandler.X_ECOMP_REQUESTID: str(uuid.uuid4())}
ctx.logger.info("getting latest policy from {0} headers={1}".format( \
ph_path, json.dumps(headers)))
res = requests.get(ph_path, headers=headers)
res.raise_for_status()
if res.status_code == requests.codes.ok:
return res.json()
return {}
#########################################################
@operation
def policy_get(**kwargs):
"""retrieve the latest policy_body for policy_id property and save it in runtime_properties"""
if ctx.type != NODE_INSTANCE or DCAE_POLICY_TYPE not in ctx.node.type_hierarchy:
error = "can only invoke policy_get on node of type {0}".format(DCAE_POLICY_TYPE)
ctx.logger.error(error)
raise NonRecoverableError(error)
if POLICY_ID not in ctx.node.properties:
error = "no {0} found in ctx.node.properties".format(POLICY_ID)
ctx.logger.error(error)
raise NonRecoverableError(error)
try:
policy_id = ctx.node.properties[POLICY_ID]
policy = PolicyHandler.get_latest_policy(policy_id)
if not policy:
raise NonRecoverableError("policy not found for policy_id {0}".format(policy_id))
ctx.logger.info("found policy {0}".format(json.dumps(policy)))
if POLICY_BODY in policy:
ctx.instance.runtime_properties[POLICY_BODY] = policy[POLICY_BODY]
except Exception as ex:
error = "failed to get policy: {0}".format(str(ex))
ctx.logger.error(error)
if ctx.node.properties.get(POLICY_REQUIRED, True):
raise NonRecoverableError(error)
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