mirror of
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66 lines
2.3 KiB
Python
66 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) 2016 Red Hat, Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#
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# Written by Ralph Bean <rbean@redhat.com>
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"""Generic messaging functions."""
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def publish(topic, msg, backend, modname='rida'):
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""" Publish a single message to a given backend, and return. """
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try:
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handler = _messaging_backends[backend]['publish']
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except KeyError:
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raise KeyError("No messaging backend found for %r" % backend)
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return handler(topic, msg, modname=modname)
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def listen(backend, **kwargs):
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""" Yield messages from a given messaging backend.
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The ``**kwargs`` arguments will be passed on to the backend to do some
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backend-specific connection handling, throttling, or filtering.
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"""
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try:
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handler = _messaging_backends[backend]['listen']
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except KeyError:
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raise KeyError("No messaging backend found for %r" % backend)
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for event in handler(**kwargs):
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yield event
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def _fedmsg_publish(topic, msg, modname):
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import fedmsg
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return fedmsg.publish(topic=topic, msg=msg, modname=modname)
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def _fedmsg_listen(**kwargs):
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import fedmsg
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for name, endpoint, topic, msg in fedmsg.tail_messages(**kwargs):
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yield msg
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_messaging_backends = {
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'fedmsg': {
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'publish': _fedmsg_publish,
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'listen': _fedmsg_listen,
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},
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}
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