OpenStack Orchestration (Heat)
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heat/heat/rpc/listener_client.py

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1.4 KiB

#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Client side of the heat worker RPC API.
"""
from oslo_config import cfg
import oslo_messaging as messaging
from heat.common import messaging as rpc_messaging
from heat.rpc import api as rpc_api
cfg.CONF.import_opt('engine_life_check_timeout', 'heat.common.config')
class EngineListenerClient(object):
'''Client side of the heat listener RPC API.
API version history::
1.0 - Initial version.
'''
BASE_RPC_API_VERSION = '1.0'
def __init__(self, engine_id):
_client = rpc_messaging.get_rpc_client(
topic=rpc_api.LISTENER_TOPIC,
version=self.BASE_RPC_API_VERSION,
server=engine_id)
self._client = _client.prepare(
timeout=cfg.CONF.engine_life_check_timeout)
def is_alive(self, ctxt):
try:
return self._client.call(ctxt, 'listening')
except messaging.MessagingTimeout:
return False