104 lines
4.0 KiB
Python
104 lines
4.0 KiB
Python
# Copyright 2014 Hewlett-Packard
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json
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import falcon
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from oslo.config import cfg
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from monasca.openstack.common import log
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from monasca.api import monasca_events_api_v2
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from monasca.common import resource_api
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from monasca.common.messaging import exceptions as message_queue_exceptions
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from monasca.common.messaging.message_formats import events_transform_factory
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from monasca.v2.common import utils
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from monasca.v2.common.schemas import exceptions as schemas_exceptions
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from monasca.v2.common.schemas import events_request_body_schema as schemas_event
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from monasca.v2.reference import helpers
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from stevedore import driver
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LOG = log.getLogger(__name__)
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class Events(monasca_events_api_v2.EventsV2API):
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def __init__(self, global_conf):
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super(Events, self).__init__(global_conf)
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self._region = cfg.CONF.region
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self._default_authorized_roles = cfg.CONF.security.default_authorized_roles
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self._delegate_authorized_roles = cfg.CONF.security.delegate_authorized_roles
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self._post_events_authorized_roles = cfg.CONF.security.default_authorized_roles + \
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cfg.CONF.security.agent_authorized_roles
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self._event_transform = events_transform_factory.create_events_transform()
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self._init_message_queue()
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def _init_message_queue(self):
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mgr = driver.DriverManager(
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namespace = 'monasca.messaging',
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name = cfg.CONF.messaging.driver,
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invoke_on_load=True,
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invoke_args=(['raw-events'])
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)
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self._message_queue = mgr.driver
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def _read_event(self, req):
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'''
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Read the event from the http request and return as JSON.
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:param req: HTTP request object.
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:return: Returns the event as a JSON object.
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:raises falcon.HTTPBadRequest:
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'''
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try:
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msg = req.stream.read()
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json_msg = json.loads(msg)
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return json_msg
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except ValueError as ex:
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LOG.debug(ex)
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raise falcon.HTTPBadRequest('Bad request', 'Request body is not valid JSON')
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def _validate_event(self, event):
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'''
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Validates the event
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:param event: An event object.
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:raises falcon.HTTPBadRequest:
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'''
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try:
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schemas_event.validate(event)
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except schemas_exceptions.ValidationException as ex:
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LOG.debug(ex)
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raise falcon.HTTPBadRequest('Bad request', ex.message)
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def _send_event(self, event):
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'''
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Send the event using the message queue.
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:param metrics: An event object.
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:raises: falcon.HTTPServiceUnavailable:
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'''
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try:
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str_msg = json.dumps(event, default=utils.date_handler)
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self._message_queue.send_message(str_msg)
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except message_queue_exceptions.MessageQueueException as ex:
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LOG.exception(ex)
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raise falcon.HTTPInternalServerError('Service unavailable', ex.message)
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@resource_api.Restify('/v2.0/events/', method='post')
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def do_post_events(self, req, res):
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helpers.validate_json_content_type(req)
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helpers.validate_authorization(req, self._post_events_authorized_roles)
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event = self._read_event(req)
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self._validate_event(event)
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tenant_id = helpers.get_tenant_id(req)
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transformed_event = self._event_transform(event, tenant_id, self._region)
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self._send_event(transformed_event)
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res.status = falcon.HTTP_204 |