84a0693737
We appear to not have a use for this. I had originally thought we might use this to ack messages one they've been processed and replied to, but we actually have always acked messages as soon as they have been deserialized and queued for dispatching. Change-Id: I8e1fd565814f3b5e3ba0f1bc77e62ed52ff08661
75 lines
2.0 KiB
Python
75 lines
2.0 KiB
Python
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# Copyright 2013 Red Hat, Inc.
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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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import abc
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from oslo.messaging import exceptions
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class TransportDriverError(exceptions.MessagingException):
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"""Base class for transport driver specific exceptions."""
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class IncomingMessage(object):
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__metaclass__ = abc.ABCMeta
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def __init__(self, listener, ctxt, message):
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self.conf = listener.conf
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self.listener = listener
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self.ctxt = ctxt
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self.message = message
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@abc.abstractmethod
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def reply(self, reply=None, failure=None):
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"Send a reply or failure back to the client."
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class Listener(object):
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__metaclass__ = abc.ABCMeta
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def __init__(self, driver, target):
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self.conf = driver.conf
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self.driver = driver
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self.target = target
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@abc.abstractmethod
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def poll(self):
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"Blocking until a message is pending and return IncomingMessage."
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class BaseDriver(object):
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__metaclass__ = abc.ABCMeta
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def __init__(self, conf, url=None, default_exchange=None):
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self.conf = conf
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self._url = url
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self._default_exchange = default_exchange
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@abc.abstractmethod
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def send(self, target, ctxt, message,
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wait_for_reply=None, timeout=None, envelope=False):
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"""Send a message to the given target."""
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@abc.abstractmethod
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def listen(self, target):
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"""Construct a Listener for the given target."""
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@abc.abstractmethod
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def cleanup(self):
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"""Release all resources."""
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