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# Copyright (C) 2015-2020 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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import logging
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import os
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import diskcache
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from diskcache import RLock
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log = logging.getLogger(__name__)
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cache_meta = None
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class ReentrantLock(RLock):
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def __enter__(self):
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reentrant_lock_key = self._key
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log.debug('Acquire ReentrantLock(key=%s) for archive cache generation...', reentrant_lock_key)
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#self.acquire()
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log.debug('Lock for key=%s acquired', reentrant_lock_key)
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def __exit__(self, *exc_info):
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#self.release()
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pass
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def get_archival_config(config):
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final_config = {
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'archive_cache.eviction_policy': 'least-frequently-used'
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}
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for k, v in config.items():
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if k.startswith('archive_cache'):
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final_config[k] = v
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return final_config
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def get_archival_cache_store(config):
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global cache_meta
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if cache_meta is not None:
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return cache_meta
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config = get_archival_config(config)
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archive_cache_dir = config['archive_cache.store_dir']
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archive_cache_size_gb = config['archive_cache.cache_size_gb']
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archive_cache_shards = config['archive_cache.cache_shards']
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archive_cache_eviction_policy = config['archive_cache.eviction_policy']
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log.debug('Initializing archival cache instance under %s', archive_cache_dir)
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# check if it's ok to write, and re-create the archive cache
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if not os.path.isdir(archive_cache_dir):
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os.makedirs(archive_cache_dir, exist_ok=True)
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d_cache = diskcache.FanoutCache(
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archive_cache_dir, shards=archive_cache_shards,
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cull_limit=0, # manual eviction required
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size_limit=archive_cache_size_gb * 1024 * 1024 * 1024,
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eviction_policy=archive_cache_eviction_policy,
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timeout=30
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)
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cache_meta = d_cache
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return cache_meta
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def includeme(config):
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# init our cache at start
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settings = config.get_settings()
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get_archival_cache_store(settings)
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