# ============LICENSE_START==================================================== # org.onap.ccsdk # ============================================================================= # 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====================================================== import requests ### "Constants" FEEDS_PATH = '/feeds' PUBS_PATH = '/dr_pubs' SUBS_PATH = '/dr_subs' TOPICS_PATH = '/topics' CLIENTS_PATH = '/mr_clients' LOCATIONS_PATH = '/dcaeLocations' class DMaaPControllerHandle(object): ''' A simple wrapper class to map DMaaP bus controller API calls into operations supported by the requests module ''' def __init__(self, api_url, user, password, logger, feeds_path = FEEDS_PATH, pubs_path = PUBS_PATH, subs_path = SUBS_PATH, topics_path = TOPICS_PATH, clients_path = CLIENTS_PATH): ''' Constructor ''' self.api_url = api_url # URL for the root of the Controller resource tree, no trailing "/" self.auth = (user, password) # user name and password for HTTP basic auth self.logger = logger self.feeds_path = feeds_path self.pubs_path = pubs_path self.subs_path = subs_path self.topics_path = topics_path self.clients_path = clients_path ### INTERNAL FUNCTIONS ### def _make_url(self, path): ''' Make a full URL given the path relative to the root ''' if not path.startswith('/'): path = '/' + path return self.api_url + path def _get_resource(self, path): ''' Get the DMaaP resource at path, where path is relative to the root. ''' url = self._make_url(path) self.logger.info("Querying URL: {0}".format(url)) return requests.get(url, auth=self.auth) def _create_resource(self, path, resource_content): ''' Create a DMaaP resource by POSTing to the resource collection identified by path (relative to root), using resource_content as the body of the post ''' url = self._make_url(path) self.logger.info("Posting to URL: {0} with body: {1}".format(url, resource_content)) return requests.post(url, auth=self.auth, json=resource_content) def _delete_resource(self, path): ''' Delete the DMaaP resource at path, where path is relative to the root. ''' url = self._make_url(path) self.logger.info("Deleting URL: {0}".format(url)) return requests.delete(url, auth=self.auth) ### PUBLIC API ### # Data Router Feeds def create_feed(self, name, version=None, description=None, aspr_class=None, owner=None): ''' Create a DMaaP data router feed with the given feed name and (optionally) feed version, feed description, ASPR classification, and owner ''' feed_definition = {'feedName' : name} if version: feed_definition['feedVersion'] = version if description: feed_definition['feedDescription'] = description if aspr_class: feed_definition['asprClassification'] = aspr_class if owner: feed_definition['owner'] = owner return self._create_resource(self.feeds_path, feed_definition) def get_feed_info(self, feed_id): ''' Get the representation of the DMaaP data router feed whose feed id is feed_id. ''' return self._get_resource("{0}/{1}".format(self.feeds_path, feed_id)) def get_feed_info_by_name(self, feed_name): ''' Get the representation of the DMaaP data router feed whose feed name is feed_name. ''' feeds = self._get_resource("{0}".format(self.feeds_path)) feed_list = feeds.json() for feed in feed_list: if feed["feedName"] == feed_name: self.logger.info("Found feed with {0}".format(feed_name)) feed_id = feed["feedId"] return self._get_resource("{0}/{1}".format(self.feeds_path, feed_id)) self.logger.info("feed_name {0} not found".format(feed_name)) return None def delete_feed(self, feed_id): ''' Delete the DMaaP data router feed whose feed id is feed_id. ''' return self._delete_resource("{0}/{1}".format(self.feeds_path, feed_id)) # Data Router Publishers def add_publisher(self, feed_id, location, username, password, status=None): ''' Add a publisher to feed feed_id at location location with user, pass, and status ''' publisher_definition = { 'feedId' : feed_id, 'dcaeLocationName' : location, 'username' : username, 'userpwd' : password } if status: publisher_definition['status'] = status return self._create_resource(self.pubs_path, publisher_definition) def get_publisher_info(self, pub_id): ''' Get the representation of the DMaaP data router publisher whose publisher id is pub_id ''' return self._get_resource("{0}/{1}".format(self.pubs_path, pub_id)) def delete_publisher(self, pub_id): ''' Delete the DMaaP data router publisher whose publisher id is id. ''' return self._delete_resource("{0}/{1}".format(self.pubs_path, pub_id)) # Data Router SUbscrihers def add_subscriber(self, feed_id, location, delivery_url, username, password, status=None): ''' Add a publisher to feed feed_id at location location with user, pass, and status ''' subscriber_definition = { 'feedId' : feed_id, 'dcaeLocationName' : location, 'deliveryURL' : delivery_url, 'username' : username, 'userpwd' : password } if status: subscriber_definition['status'] = status return self._create_resource(self.subs_path, subscriber_definition) def get_subscriber_info(self, sub_id): ''' Get the representation of the DMaaP data router subscriber whose subscriber id is sub_id ''' return self._get_resource("{0}/{1}".format(self.subs_path, sub_id)) def delete_subscriber(self, sub_id): ''' Delete the DMaaP data router subscriber whose subscriber id is sub_id. ''' return self._delete_resource("{0}/{1}".format(self.subs_path, sub_id)) # Message router topics def create_topic(self, name, description = None, txenable = None, owner = None, replication_case = None, global_mr_url = None): ''' Create a message router topic with the topic name 'name' and optionally the topic_description 'description', the 'txenable' flag and the topic owner 'owner'. ''' topic_definition = {'topicName' : name}; if description: topic_definition['topicDescription'] = description if owner: topic_definition['owner'] = owner if txenable != None: # It's a boolean! topic_definition['txenable'] = txenable if replication_case: topic_definition['replicationCase'] = replication_case if global_mr_url: topic_definition['globalMrURL'] = global_mr_url return self._create_resource(self.topics_path, topic_definition) def get_topic_info(self, fqtn): ''' Get information about the topic whose fully-qualified name is 'fqtn' ''' return self._get_resource("{0}/{1}".format(self.topics_path, fqtn)) def get_topic_fqtn_by_name(self, topic_name): ''' Get the representation of the DMaaP message router topic fqtn whose topic name is topic_name. ''' topics = self._get_resource("{0}".format(self.topics_path)) topic_list = topics.json() for topic in topic_list: if topic["topicName"] == topic_name: self.logger.info("Found existing topic with name {0}".format(topic_name)) fqtn = topic["fqtn"] return fqtn self.logger.info("topic_name {0} not found".format(topic_name)) return None def delete_topic(self, fqtn): ''' Delete the topic whose fully qualified name is 'fqtn' ''' return self._delete_resource("{0}/{1}".format(self.topics_path, fqtn)) # Message route clients (publishers and subscribers def create_client(self, fqtn, location, client_role, actions): ''' Creates a client authorized to access the topic with fully-qualified name 'fqtn', from the location 'location', using the AAF client role 'client_role'. The client is authorized to perform actions in the list 'actions'. (Valid values are 'pub', 'sub', and 'view' ''' client_definition = { 'fqtn' : fqtn, 'dcaeLocationName' : location, 'clientRole' : client_role, 'action' : actions } return self._create_resource(self.clients_path, client_definition) def get_client_info(self, client_id): ''' Get client information for the client whose client ID is 'client_id' ''' return self._get_resource("{0}/{1}".format(self.clients_path, client_id)) def delete_client(self, client_id): ''' Delete the client whose client ID is 'client_id' ''' return self._delete_resource("{0}/{1}".format(self.clients_path, client_id)) def get_dcae_locations(self, dcae_layer): ''' Get the list of location names known to the DMaaP bus controller whose "dcaeLayer" property matches dcae_layer and whose status is "VALID". ''' # Do these as a separate step so things like 404 get reported precisely locations = self._get_resource(LOCATIONS_PATH) locations.raise_for_status() # pull out location names for VALID locations with matching dcae_layer return map(lambda l: l["dcaeLocationName"], filter(lambda i : (i['dcaeLayer'] == dcae_layer and i['status'] == 'VALID'), locations.json())) def get_dcae_central_locations(self): ''' Get the list of location names known to the DMaaP bus controller whose "dcaeLayer" property contains "central" (ignoring case) and whose status is "VALID". "dcaeLayer" contains "central" for central sites. ''' # Do these as a separate step so things like 404 get reported precisely locations = self._get_resource(LOCATIONS_PATH) locations.raise_for_status() # pull out location names for VALID central locations return map(lambda l: l["dcaeLocationName"], filter(lambda i : ('central' in i['dcaeLayer'].lower() and i['status'] == 'VALID'), locations.json()))