OpenStack library for messaging
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# Copyright 2013 New Dream Network, LLC (DreamHost)
#
# 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.
import abc
from oslo_config import cfg
import six
_pool_opts = [
cfg.IntOpt('rpc_thread_pool_size',
default=64,
help='Size of RPC thread pool.'),
]
@six.add_metaclass(abc.ABCMeta)
class ExecutorBase(object):
def __init__(self, conf, listener, dispatcher):
self.conf = conf
self.listener = listener
self.dispatcher = dispatcher
@abc.abstractmethod
def start(self):
"Start polling for incoming messages."
@abc.abstractmethod
def stop(self):
"Stop polling for messages."
@abc.abstractmethod
def wait(self):
"Wait until the executor has stopped polling."
class PooledExecutorBase(ExecutorBase):
"""An executor that uses a rpc thread pool of a given size."""
def __init__(self, conf, listener, callback):
super(PooledExecutorBase, self).__init__(conf, listener, callback)
self.conf.register_opts(_pool_opts)