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# -*- coding: utf-8 -*-
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# Copyright (C) 2010-2017 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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Custom LRU memory manager for debugging purposes. It allows to track the keys
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and the state of LRU dict.
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inrae.cache is licensed under LRUDict is licensed under ZPL license
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This software is Copyright (c) Zope Corporation (tm) and
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Contributors. All rights reserved.
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TODO: marcink, we might think of replacing the LRUDict with lru-dict library
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written in C.
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eg difference in speed:
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LRUDictC Time : 0.00025 s, Memory : 110592 Kb
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LRUDict Time : 0.00369 s, Memory : 147456 Kb
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"""
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import logging
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from infrae.cache.beakerext.lru import LRUDict
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from beaker.container import MemoryNamespaceManager, AbstractDictionaryNSManager
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from rhodecode.lib.utils2 import safe_str
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log = logging.getLogger(__name__)
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class LRUDictDebug(LRUDict):
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"""
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Wrapper to provide some debug options
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"""
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def _report_keys(self):
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elems_cnt = '%s/%s' % (len(self.keys()), self.size)
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# trick for pformat print it more nicely
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fmt = '\n'
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for cnt, elem in enumerate(self.keys()):
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fmt += '%s - %s\n' % (cnt+1, safe_str(elem))
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log.debug('current LRU keys (%s):%s' % (elems_cnt, fmt))
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def __getitem__(self, key):
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self._report_keys()
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return self.get(key)
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class MemoryLRUNamespaceManagerBase(MemoryNamespaceManager):
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default_max_items = 10000
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def _get_factory(self, max_items):
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def Factory():
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return LRUDict(int(max_items))
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return Factory
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def __init__(self, namespace, **kwargs):
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AbstractDictionaryNSManager.__init__(self, namespace)
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if 'max_items' in kwargs:
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max_items = kwargs['max_items']
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else:
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max_items = self.default_max_items
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Factory = self._get_factory(max_items)
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self.dictionary = MemoryNamespaceManager.namespaces.get(
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self.namespace, Factory)
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class MemoryLRUNamespaceManagerDebug(MemoryLRUNamespaceManagerBase):
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"""
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A memory namespace manager that return with LRU dicts backend,
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special debug for testing
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"""
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default_max_items = 10000
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def _get_factory(self, max_items):
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def Factory():
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return LRUDictDebug(int(max_items))
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return Factory
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