41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
# Copyright 2016 - Nokia
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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 oslo_messaging
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import pecan
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from pecan import rest
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class RootRestController(rest.RestController):
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@pecan.expose()
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def _route(self, args, request=None):
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"""All requests go through here
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We can check the backend status
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"""
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if not pecan.request.check_backend:
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return super(RootRestController, self)._route(args, request)
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try:
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client = pecan.request.client.prepare(timeout=5)
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backend_is_alive = client.call(pecan.request.context, 'is_alive')
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if backend_is_alive:
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return super(RootRestController, self)._route(args, request)
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else:
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pecan.abort(503, detail='vitrage-graph is not ready')
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except oslo_messaging.MessagingTimeout:
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pecan.abort(503, detail='vitrage-graph not available')
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