7a528035b8
Re-add the Singleton class which were removed from the base services module after introducing the backend mechanism[1]. [1] 861e8d6677df63660268376fcf4a78b2838d5ad9 Closes-Bug: #2099955 Change-Id: I8849488df9b4db1d4af38b54444be4261b541e0c
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# 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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# Copyright 2011 Justin Santa Barbara
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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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"""Generic Node base class for all workers that run on hosts."""
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import copy
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from oslo_service.backend import get_component
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from oslo_service import _options
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# Dynamically expose components from the backend
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ServiceBase = get_component("ServiceBase")
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ServiceLauncher = get_component("ServiceLauncher")
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Launcher = get_component("Launcher")
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ProcessLauncher = get_component("ProcessLauncher")
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Service = get_component("Service")
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Services = get_component("Services")
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ServiceWrapper = get_component("ServiceWrapper")
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SignalHandler = get_component("SignalHandler")
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SignalExit = get_component("SignalExit")
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Singleton = get_component("Singleton")
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# Function exports
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launch = get_component("launch")
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# Utility functions
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_is_daemon = get_component("_is_daemon")
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_is_sighup_and_daemon = get_component("_is_sighup_and_daemon")
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def list_opts():
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"""Entry point for oslo-config-generator."""
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return [(None, copy.deepcopy(_options.eventlet_backdoor_opts +
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_options.service_opts))]
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