87 lines
2.3 KiB
Python
87 lines
2.3 KiB
Python
# Copyright 2016 Rackspace Inc.
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#
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# Author: Eric Larson <eric.larson@rackspace.com>
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#
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# 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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import time
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from concurrent import futures
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from oslo_log import log as logging
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from oslo_config import cfg
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from designate import exceptions
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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def default_executor():
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thread_count = 5
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try:
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thread_count = CONF['service:worker'].threads
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except Exception:
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pass
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return futures.ThreadPoolExecutor(thread_count)
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class Executor(object):
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"""
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Object to facilitate the running of a task, or a set of tasks on an
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executor that can map multiple tasks across a configurable number of
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threads
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"""
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def __init__(self, executor=None):
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self._executor = executor or default_executor()
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@staticmethod
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def do(task):
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try:
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return task()
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except exceptions.BadAction as e:
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LOG.warning(e)
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@staticmethod
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def task_name(task):
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if hasattr(task, 'task_name'):
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return str(task.task_name)
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if hasattr(task, 'func_name'):
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return str(task.func_name)
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return 'UnnamedTask'
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def run(self, tasks):
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"""
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Run task or set of tasks
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:param tasks: the task or tasks you want to execute in the
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executor's pool
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:return: The results of the tasks (list)
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If a single task is pass
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"""
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start_time = time.time()
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if callable(tasks):
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tasks = [tasks]
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results = [r for r in self._executor.map(self.do, tasks)]
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end_time = time.time()
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task_time = end_time - start_time
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task_names = [self.task_name(t) for t in tasks]
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LOG.debug("Finished Tasks %(tasks)s in %(time)fs",
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{'tasks': task_names, 'time': task_time})
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return results
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