80 lines
2.9 KiB
Python
80 lines
2.9 KiB
Python
# Copyright (c) 2015 Catalyst IT Ltd.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from zaqarclient.queues.v2 import core
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class Subscription(object):
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def __init__(self, client, queue_name, subscriber=None, ttl=60, id=None,
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auto_create=True, **kwargs):
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self.client = client
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self.id = id
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self.queue_name = queue_name
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self.subscriber = subscriber
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self.ttl = ttl
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self.options = kwargs.get('options', {})
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if auto_create:
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self.ensure_exists()
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def ensure_exists(self):
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"""Ensures subscription exists
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This method is not race safe, the subscription could've been deleted
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right after it was called.
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"""
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req, trans = self.client._request_and_transport()
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if not self.id and self.subscriber:
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subscription_data = {'subscriber': self.subscriber,
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'ttl': self.ttl,
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'options': self.options
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}
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subscription = core.subscription_create(trans, req,
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self.queue_name,
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subscription_data)
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if subscription and 'subscription_id' in subscription:
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self.id = subscription['subscription_id']
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if self.id:
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sub = core.subscription_get(trans, req, self.queue_name, self.id)
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self.subscriber = sub.get('subscriber')
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self.ttl = sub.get('ttl')
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self.options = sub.get('options')
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def update(self, subscription_data):
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req, trans = self.client._request_and_transport()
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core.subscription_update(trans, req, self.queue_name,
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self.id, subscription_data)
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for key, value in subscription_data.items():
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setattr(self, key, value)
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def delete(self):
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req, trans = self.client._request_and_transport()
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core.subscription_delete(trans, req, self.queue_name, self.id)
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def create_object(parent):
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return lambda kwargs: Subscription(parent, kwargs.pop('source'),
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subscriber=kwargs.pop('subscriber'),
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ttl=kwargs.pop('ttl'),
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id=kwargs.pop('id'),
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auto_create=False,
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**kwargs)
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