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# ================================================================================
# Copyright (c) 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=========================================================
#
"""utils for policy usage and conversions"""
from ..onap.audit import Audit
from ..policy_consts import POLICY_BODY, POLICY_ID
from .pdp_consts import (PDP_METADATA, PDP_POLICY_ID,
PDP_POLICY_VERSION, PDP_PROPERTIES,
PDP_REQ_ONAP_COMPONENT, PDP_REQ_ONAP_INSTANCE,
PDP_REQ_ONAP_NAME, PDP_REQ_RESOURCE, POLICY_CONFIG,
POLICY_NAME, POLICY_VERSION)
class PolicyUtils(object):
"""policy-client utils"""
@staticmethod
def gen_req_to_pdp(policy_id):
"""request to get a single policy from pdp by policy_id"""
return {
PDP_REQ_ONAP_NAME: "DCAE",
PDP_REQ_ONAP_COMPONENT: Audit.service_name,
PDP_REQ_ONAP_INSTANCE: Audit.SERVICE_INSTANCE_UUID,
"action": "configure",
PDP_REQ_RESOURCE: {PDP_POLICY_ID: [policy_id]}
}
@staticmethod
def convert_to_policy(policy_body):
"""
set policy id, name, version, config=properties and
wrap policy_body received from policy-engine with policy_id
input:
{
"type": "onap.policies.monitoring.cdap.tca.hi.lo.app",
"version": "1.0.0",
"metadata": {
"policy-id": "onap.scaleout.tca",
"policy-version": 1,
"description": "The scaleout policy for vDNS"
},
"properties": {
"tca_policy": {
"domain": "measurementsForVfScaling",
"metricsPerEventName": [
{
"eventName": "vLoadBalancer",
"controlLoopSchemaType": "VNF",
"policyScope": "type=configuration"
}
]
}
}
}
output:
{
"policy_id": "onap.scaleout.tca",
"policy_body": {
"policyName": "onap.scaleout.tca.1.xml",
"policyVersion": 1,
"type": "onap.policies.monitoring.cdap.tca.hi.lo.app",
"version": "1.0.0",
"metadata": {
"policy-id": "onap.scaleout.tca",
"policy-version": 1,
"description": "The scaleout policy for vDNS"
},
"config": {
"tca_policy": {
"domain": "measurementsForVfScaling",
"metricsPerEventName": [
{
"eventName": "vLoadBalancer",
"controlLoopSchemaType": "VNF",
"policyScope": "type=configuration"
}
]
}
}
}
}
"""
if not policy_body or not policy_body.get(PDP_PROPERTIES):
return None
pdp_metadata = policy_body.get(PDP_METADATA, {})
policy_id = pdp_metadata.get(PDP_POLICY_ID)
policy_version = pdp_metadata.get(PDP_POLICY_VERSION)
if not policy_id or not policy_version:
return None
policy_body[POLICY_NAME] = "{}.{}.xml".format(policy_id, policy_version)
policy_body[POLICY_VERSION] = str(policy_version)
policy_body[POLICY_CONFIG] = policy_body[PDP_PROPERTIES]
del policy_body[PDP_PROPERTIES]
return {POLICY_ID:policy_id, POLICY_BODY:policy_body}
@staticmethod
def validate_policy(policy):
"""validate have non-empty config in policy"""
if not policy:
return False
policy_body = policy.get(POLICY_BODY)
return bool(policy_body and policy_body.get(POLICY_CONFIG))
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