58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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from nova.utils import import_object
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from nova.rpc.common import RemoteError, LOG
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from nova import flags
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FLAGS = flags.FLAGS
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flags.DEFINE_string('rpc_backend',
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'nova.rpc.impl_kombu',
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"The messaging module to use, defaults to kombu.")
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_RPCIMPL = None
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def get_impl():
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"""Delay import of rpc_backend until FLAGS are loaded."""
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global _RPCIMPL
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if _RPCIMPL is None:
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_RPCIMPL = import_object(FLAGS.rpc_backend)
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return _RPCIMPL
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def create_connection(new=True):
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return get_impl().create_connection(new=new)
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def call(context, topic, msg):
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return get_impl().call(context, topic, msg)
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def cast(context, topic, msg):
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return get_impl().cast(context, topic, msg)
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def fanout_cast(context, topic, msg):
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return get_impl().fanout_cast(context, topic, msg)
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def multicall(context, topic, msg):
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return get_impl().multicall(context, topic, msg)
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