60 lines
2.0 KiB
Python
60 lines
2.0 KiB
Python
# Copyright 2016 - Nokia Networks
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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 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 eventlet import event
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from oslo_service import service
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from mistral.service import coordination
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class MistralService(service.Service):
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"""Base class for Mistral services.
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The term 'service' here means any Mistral component that can run as
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an independent process and thus can be registered as a cluster member.
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"""
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def __init__(self, cluster_group, setup_profiler=True):
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super(MistralService, self).__init__()
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self.cluster_member = coordination.Service(cluster_group)
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self._setup_profiler = setup_profiler
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self._started = event.Event()
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def wait_started(self):
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"""Wait until the service is fully started."""
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self._started.wait()
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def _notify_started(self, message):
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print(message)
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self._started.send()
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def start(self):
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super(MistralService, self).start()
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self.cluster_member.register_membership()
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def stop(self, graceful=False):
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super(MistralService, self).stop(graceful)
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self._started = event.Event()
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# TODO(rakhmerov): Probably we could also take care of an RPC server
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# if it exists for this particular service type. Take a look at
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# executor and engine servers.
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# TODO(rakhmerov): This method is not implemented correctly now
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# (not thread-safe). Uncomment this call once it's fixed.
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# self.cluster_member.stop()
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