1ca46da302
AutoReconnect errors are not being handled and so, propagated to the client. This patch adds a safe_call decorator. The purpose of safe_call is to catch ConnectionFailure and raise a ConnectionError instead. Future patches will make the transport catch ConnectionError and handle it correctly instead of propagating it to the client. All storage back-end should support this. Fixes bug: #1169821 Change-Id: I523232a7cefbd00082447403ceb3abada9af6db3
102 lines
3.0 KiB
Python
102 lines
3.0 KiB
Python
# Copyright (c) 2013 Red Hat, 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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class ConnectionError(Exception):
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"""Raised when the connection with the back-end
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was lost.
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"""
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class DoesNotExist(Exception):
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pass
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class NotPermitted(Exception):
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pass
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class Conflict(Exception):
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"""Resource could not be created due to a conflict
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with an existing resource.
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"""
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class MalformedID(ValueError):
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"""ID was malformed."""
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class MalformedMarker(ValueError):
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"""Pagination marker was malformed."""
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class MessageConflict(Conflict):
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def __init__(self, queue, project, message_ids):
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"""Initializes the error with contextual information.
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:param queue: name of the queue to which the message was posted
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:param project: name of the project to which the queue belongs
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:param message_ids: list of IDs for messages successfully
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posted. Note that these must be in the same order as the
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list of messages originally submitted to be enqueued.
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"""
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msg = (_('Message could not be enqueued due to a conflict '
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'with another message that is already in '
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'queue %(queue)s for project %(project)s') %
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dict(queue=queue, project=project))
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super(MessageConflict, self).__init__(msg)
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self._succeeded_ids = message_ids
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@property
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def succeeded_ids(self):
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return self._succeeded_ids
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class QueueDoesNotExist(DoesNotExist):
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def __init__(self, name, project):
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msg = (_('Queue %(name)s does not exist for project %(project)s') %
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dict(name=name, project=project))
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super(QueueDoesNotExist, self).__init__(msg)
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class MessageDoesNotExist(DoesNotExist):
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def __init__(self, mid, queue, project):
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msg = (_('Message %(mid)s does not exist in '
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'queue %(queue)s for project %(project)s') %
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dict(mid=mid, queue=queue, project=project))
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super(MessageDoesNotExist, self).__init__(msg)
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class ClaimDoesNotExist(DoesNotExist):
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def __init__(self, cid, queue, project):
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msg = (_('Claim %(cid)s does not exist in '
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'queue %(queue)s for project %(project)s') %
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dict(cid=cid, queue=queue, project=project))
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super(ClaimDoesNotExist, self).__init__(msg)
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class ClaimNotPermitted(NotPermitted):
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def __init__(self, mid, cid):
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msg = (_('Message %(mid)s is not claimed by %(cid)s') %
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dict(cid=cid, mid=mid))
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super(ClaimNotPermitted, self).__init__(msg)
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