1 # ==================================================================================
2 # Copyright (c) 2019-2020 Nokia
3 # Copyright (c) 2018-2020 AT&T Intellectual Property.
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16 # ==================================================================================
20 from jsonschema import validate
21 from jsonschema.exceptions import ValidationError
23 from mdclogpy import Logger
24 from ricsdl.exceptions import RejectedByBackend, NotConnected, BackendError
25 from a1 import a1rmr, exceptions, data
28 mdc_logger = Logger(name=__name__)
31 def _log_build_http_resp(exception, http_resp_code):
33 helper method that logs the exception and returns a tuple of (str, int) as a http response
36 mdc_logger.warning("Request failed, returning {0}: {1}".format(http_resp_code, msg))
37 return msg, http_resp_code
40 def _try_func_return(func):
42 helper method that runs the function and returns a detailed http response if an exception is raised.
46 except (ValidationError, exceptions.PolicyTypeAlreadyExists, exceptions.PolicyTypeIdMismatch, exceptions.CantDeleteNonEmptyType) as exc:
47 return _log_build_http_resp(exc, 400)
48 except (exceptions.PolicyTypeNotFound, exceptions.PolicyInstanceNotFound) as exc:
49 return _log_build_http_resp(exc, 404)
50 except (RejectedByBackend, NotConnected, BackendError) as exc:
52 These are SDL errors. At the time of development here, we do not have a good understanding
53 which of these errors are "try again later it may work" and which are "never going to work".
54 There is some discussion that RejectedByBackend is in the latter category, suggesting it
55 should map to 400, but until we understand the root cause of these errors, it's confusing
56 to clients to give them a 400 (a "your fault" code) because they won't know how to fix.
57 For now, we log, and 503, and investigate the logs later to improve the handling/reporting.
59 # mdc_logger.exception(exc) # waiting for https://jira.o-ran-sc.org/browse/RIC-39
60 return _log_build_http_resp(exc, 503)
61 # let other types of unexpected exceptions blow up and log
67 def get_healthcheck():
69 Handles healthcheck GET
70 Currently, this checks:
71 1. whether the a1 webserver is up (if it isn't, this won't even be called, so even entering this function confirms it is)
72 2. checks whether the rmr thread is running and has completed a loop recently
73 3. checks that our SDL connection is healthy
75 if not a1rmr.healthcheck_rmr_thread():
76 mdc_logger.debug("A1 is not healthy due to the rmr thread")
77 return "rmr thread is unhealthy", 500
78 if not data.SDL.healthcheck():
79 mdc_logger.debug("A1 is not healthy because it does not have a connection to SDL")
80 return "sdl connection is unhealthy", 500
87 def get_all_policy_types():
89 Handles GET /a1-p/policytypes
91 return _try_func_return(data.get_type_list)
94 def create_policy_type(policy_type_id):
96 Handles PUT /a1-p/policytypes/policy_type_id
99 def put_type_handler():
100 data.store_policy_type(policy_type_id, body)
101 mdc_logger.debug("Policy type {} created.".format(policy_type_id))
104 body = connexion.request.json
105 return _try_func_return(put_type_handler)
108 def get_policy_type(policy_type_id):
110 Handles GET /a1-p/policytypes/policy_type_id
112 return _try_func_return(lambda: data.get_policy_type(policy_type_id))
115 def delete_policy_type(policy_type_id):
117 Handles DELETE /a1-p/policytypes/policy_type_id
120 def delete_policy_type_handler():
121 data.delete_policy_type(policy_type_id)
122 mdc_logger.debug("Policy type {} deleted.".format(policy_type_id))
125 return _try_func_return(delete_policy_type_handler)
131 def get_all_instances_for_type(policy_type_id):
133 Handles GET /a1-p/policytypes/policy_type_id/policies
135 return _try_func_return(lambda: data.get_instance_list(policy_type_id))
138 def get_policy_instance(policy_type_id, policy_instance_id):
140 Handles GET /a1-p/policytypes/polidyid/policies/policy_instance_id
142 return _try_func_return(lambda: data.get_policy_instance(policy_type_id, policy_instance_id))
145 def get_policy_instance_status(policy_type_id, policy_instance_id):
147 Handles GET /a1-p/policytypes/polidyid/policies/policy_instance_id/status
149 Return the aggregated status. The order of rules is as follows:
150 1. If a1 has received at least one status, and *all* received statuses are "DELETED", we blow away the instance and return a 404
151 2. if a1 has received at least one status and at least one is OK, we return "IN EFFECT"
152 3. "NOT IN EFFECT" otherwise (no statuses, or none are OK but not all are deleted)
154 return _try_func_return(lambda: data.get_policy_instance_status(policy_type_id, policy_instance_id))
157 def create_or_replace_policy_instance(policy_type_id, policy_instance_id):
159 Handles PUT /a1-p/policytypes/polidyid/policies/policy_instance_id
161 instance = connexion.request.json
163 def put_instance_handler():
165 Handles policy instance put
167 For now, policy_type_id is used as the message type
169 # validate the PUT against the schema
170 schema = data.get_policy_type(policy_type_id)["create_schema"]
171 validate(instance=instance, schema=schema)
174 data.store_policy_instance(policy_type_id, policy_instance_id, instance)
176 # queue rmr send (best effort)
177 a1rmr.queue_instance_send(("CREATE", policy_type_id, policy_instance_id, instance))
181 return _try_func_return(put_instance_handler)
184 def delete_policy_instance(policy_type_id, policy_instance_id):
186 Handles DELETE /a1-p/policytypes/polidyid/policies/policy_instance_id
189 def delete_instance_handler():
190 data.delete_policy_instance(policy_type_id, policy_instance_id)
192 # queue rmr send (best effort)
193 a1rmr.queue_instance_send(("DELETE", policy_type_id, policy_instance_id, ""))
197 return _try_func_return(delete_instance_handler)