44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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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 message import Message
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class Subscription(object):
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def __init__(self, client, queue, prefetch_count=1):
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self._client = client
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self._queue = queue
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self._promise = None
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self._prefetch_count = prefetch_count
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def __enter__(self):
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self._promise = self._client.basic_consume(
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queue=self._queue,
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prefetch_count=self._prefetch_count)
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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promise = self._client.basic_cancel(self._promise)
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self._client.wait(promise)
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return False
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def get_message(self, timeout=None):
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if not self._promise:
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raise RuntimeError(
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"Subscription object must be used within 'with' block")
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msg_handle = self._client.wait(self._promise, timeout=timeout)
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msg = Message(self._client, msg_handle)
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return msg
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