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# Copyright (c) 2015 Catalyst IT Ltd.
#
# 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.
from zaqarclient.queues.v2 import core
class Subscription(object):
def __init__(self, client, queue_name, subscriber=None, ttl=60, id=None,
auto_create=True, **kwargs):
self.client = client
self.id = id
self.queue_name = queue_name
self.subscriber = subscriber
self.ttl = ttl
self.options = kwargs.get('options', {})
self.age = kwargs.get('age')
self.confirmed = kwargs.get('confirmed')
if auto_create:
self.ensure_exists()
def ensure_exists(self):
"""Ensures subscription exists
This method is not race safe, the subscription could've been deleted
right after it was called.
"""
req, trans = self.client._request_and_transport()
if not self.id and self.subscriber:
subscription_data = {'subscriber': self.subscriber,
'ttl': self.ttl,
'options': self.options
}
subscription = core.subscription_create(trans, req,
self.queue_name,
subscription_data)
if subscription and 'subscription_id' in subscription:
self.id = subscription['subscription_id']
if self.id:
sub = core.subscription_get(trans, req, self.queue_name, self.id)
self.subscriber = sub.get('subscriber')
self.ttl = sub.get('ttl')
self.options = sub.get('options')
self.age = sub.get('age')
self.confirmed = sub.get('confirmed')
def update(self, subscription_data):
req, trans = self.client._request_and_transport()
core.subscription_update(trans, req, self.queue_name,
self.id, subscription_data)
for key, value in subscription_data.items():
setattr(self, key, value)
def delete(self):
req, trans = self.client._request_and_transport()
core.subscription_delete(trans, req, self.queue_name, self.id)
def create_object(parent):
return lambda kwargs: Subscription(parent, kwargs.pop('source'),
subscriber=kwargs.pop('subscriber'),
ttl=kwargs.pop('ttl'),
id=kwargs.pop('id'),
age=kwargs.pop('age'),
confirmed=kwargs.pop('confirmed'),
auto_create=False,
**kwargs)
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