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Diffstat (limited to 'policyhandler/pdp_api/policy_utils.py')
-rw-r--r-- | policyhandler/pdp_api/policy_utils.py | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/policyhandler/pdp_api/policy_utils.py b/policyhandler/pdp_api/policy_utils.py new file mode 100644 index 0000000..1d06d14 --- /dev/null +++ b/policyhandler/pdp_api/policy_utils.py @@ -0,0 +1,123 @@ +# ================================================================================ +# 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)) |