86f016f75e
The backends need to be in the documentation so that developers know what the options are. Change-Id: If426c95a39424232ccda2d543bdaac3844ed61a8 Partial-Bug: 1469831 Partial-Bug: 1469833
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
# Copyright 2014 Mirantis Inc
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# All Rights Reserved.
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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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"""dogpile.cache backend that uses Memcached connection pool"""
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import functools
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import logging
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from dogpile.cache.backends import memcached as memcached_backend
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from oslo_cache import _memcache_pool
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LOG = logging.getLogger(__name__)
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# Helper to ease backend refactoring
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class ClientProxy(object):
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def __init__(self, client_pool):
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self.client_pool = client_pool
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def _run_method(self, __name, *args, **kwargs):
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with self.client_pool.acquire() as client:
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return getattr(client, __name)(*args, **kwargs)
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def __getattr__(self, name):
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return functools.partial(self._run_method, name)
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class PooledMemcachedBackend(memcached_backend.MemcachedBackend):
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"""Memcached backend that does connection pooling."""
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# Composed from GenericMemcachedBackend's and MemcacheArgs's __init__
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def __init__(self, arguments):
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super(PooledMemcachedBackend, self).__init__(arguments)
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self.client_pool = _memcache_pool.MemcacheClientPool(
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self.url,
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arguments={
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'dead_retry': arguments.get('dead_retry', 5 * 60),
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'socket_timeout': arguments.get('socket_timeout', 3),
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},
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maxsize=arguments.get('pool_maxsize', 10),
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unused_timeout=arguments.get('pool_unused_timeout', 60),
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conn_get_timeout=arguments.get('pool_connection_get_timeout', 10),
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)
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# Since all methods in backend just call one of methods of client, this
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# lets us avoid need to hack it too much
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@property
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def client(self):
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return ClientProxy(self.client_pool)
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