103 lines
2.9 KiB
Python
103 lines
2.9 KiB
Python
# Copyright 2018 FUJITSU LIMITED
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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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from monasca_common.rest import utils as rest_utils
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from oslo_utils import encodeutils
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from oslo_utils import timeutils
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def serialize_envelope(envelope):
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"""Returns json representation of an envelope.
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:return: json object of envelope
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:rtype: json or a bytestring `encoding` encoded
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representation of it.
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"""
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json = rest_utils.as_json(envelope, ensure_ascii=False)
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return encodeutils.safe_decode(json, 'utf-8')
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class EventEnvelopeException(Exception):
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pass
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class Envelope(dict):
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def __init__(self, event, meta):
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if not event:
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error_msg = 'Envelope cannot be created without event'
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raise EventEnvelopeException(error_msg)
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if 'project_id' not in meta or not meta.get('project_id'):
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error_msg = 'Envelope cannot be created without project_id'
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raise EventEnvelopeException(error_msg)
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creation_time = self._get_creation_time()
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super(Envelope, self).__init__(
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event=rest_utils.from_json(event),
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creation_time=creation_time,
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meta=meta
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)
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@staticmethod
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def _get_creation_time():
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return timeutils.utcnow_ts()
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@classmethod
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def new_envelope(cls, event, project_id):
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"""Creates new event envelope
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Event envelope is combined of of following properties
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* event - dict
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* creation_time - timestamp
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* meta - meta block
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Example output json would be like this:
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.. code-block:: json
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{
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"event": {
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"message": "Some message",
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"dimensions": {
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"hostname": "devstack"
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}
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},
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"creation_time": 1447834886,
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"meta": {
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"project_id": "e4bd29509eda473092d32aadfee3e7b1",
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}
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}
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:param dict event: original event element
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:param str project_id: project id to be put in meta field
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"""
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event_meta = {
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'project_id': project_id
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}
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return cls(event, event_meta)
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@property
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def event(self):
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return self.get('event', None)
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@property
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def creation_time(self):
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return self.get('creation_time', None)
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@property
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def meta(self):
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return self.get('meta', None)
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