5de514f1f8
Introduces a new threading backend for oslo.service that provides a complete alternative to the eventlet-based backend. This backend includes: • A ThreadGroup and Thread implementation using the Python threading module. • A reimplementation of all looping call utilities ( FixedIntervalLoopingCall, DynamicLoopingCall, etc.) using threading.Event and futurist.ThreadPoolExecutor. • A service management layer based on cotyledon, including Service,ServiceWrapper, Launcher, and ProcessLauncher. • A new ThreadingBackend class that exposes all components needed for integration into oslo.service. This change provides a robust and eventlet-free alternative backend while maintaining API compatibility. Change-Id: Ia7518401ccdcc28afbffd4ffe5c3b772f3617001
66 lines
2.6 KiB
Python
66 lines
2.6 KiB
Python
# Copyright (C) 2024 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_service.backend.base import BaseBackend
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from oslo_service.backend.common import daemon_utils
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from oslo_service.backend.common import signal_utils
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from oslo_service.backend.common import singleton
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from oslo_service.backend.eventlet import loopingcall
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from oslo_service.backend.eventlet import service
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from oslo_service.backend.eventlet import threadgroup
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class EventletBackend(BaseBackend):
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"""Backend implementation for Eventlet."""
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@staticmethod
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def get_service_components():
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"""Return the components provided by the Eventlet backend."""
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return {
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# Classes
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"ServiceBase": service.ServiceBase,
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"ServiceLauncher": service.ServiceLauncher,
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"Launcher": service.Launcher,
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"ProcessLauncher": service.ProcessLauncher,
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"Service": service.Service,
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"Services": service.Services,
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"ServiceWrapper": service.ServiceWrapper,
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"SignalHandler": service.SignalHandler,
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"SignalExit": signal_utils.SignalExit,
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"Singleton": singleton.Singleton,
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# Looping call-related classes
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"LoopingCallBase": loopingcall.LoopingCallBase,
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"LoopingCallDone": loopingcall.LoopingCallDone,
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"LoopingCallTimeOut": loopingcall.LoopingCallTimeOut,
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"FixedIntervalLoopingCall": loopingcall.FixedIntervalLoopingCall,
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"FixedIntervalWithTimeoutLoopingCall":
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loopingcall.FixedIntervalWithTimeoutLoopingCall,
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"DynamicLoopingCall": loopingcall.DynamicLoopingCall,
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"BackOffLoopingCall": loopingcall.BackOffLoopingCall,
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"RetryDecorator": loopingcall.RetryDecorator,
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# Threadgroup call-related classes
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"ThreadGroup": threadgroup.ThreadGroup,
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"Thread": threadgroup.Thread,
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# Functions
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"launch": service.launch,
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"_is_daemon": daemon_utils.is_daemon,
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"_is_sighup_and_daemon": daemon_utils.is_sighup_and_daemon,
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}
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