60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# 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 oslo_config import cfg
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from oslo_context import context as oslo_context
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from oslo_log import log as logging
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import oslo_messaging
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from senlin.common import consts
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from senlin.common import messaging
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LOG = logging.getLogger(__name__)
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OPERATIONS = (
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START_ACTION, CANCEL_ACTION, STOP
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) = (
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'start_action', 'cancel_action', 'stop'
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)
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def notify(method, engine_id=None, **kwargs):
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"""Send notification to dispatcher.
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Note that dispatcher is an engine internal communication. We are not using
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versioned object serialization at this level.
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:param method: remote method to call
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:param engine_id: dispatcher to notify; None implies broadcast
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"""
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client = messaging.get_rpc_client(consts.ENGINE_TOPIC, cfg.CONF.host)
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if engine_id:
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# Notify specific dispatcher identified by engine_id
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call_context = client.prepare(server=engine_id)
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else:
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# Broadcast to all disptachers
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call_context = client.prepare(fanout=True)
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try:
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# We don't use ctext parameter in action progress
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# actually. But since RPCClient.call needs this param,
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# we use oslo current context here.
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call_context.cast(oslo_context.get_current(), method, **kwargs)
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return True
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except oslo_messaging.MessagingTimeout:
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return False
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def start_action(engine_id=None, **kwargs):
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return notify(START_ACTION, engine_id, **kwargs)
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