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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 threading
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from dogpile.cache import register_backend
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from . import region_meta
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from .utils import (
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ActiveRegionCache,
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FreshRegionCache,
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InvalidationContext,
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backend_key_generator,
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clear_cache_namespace,
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get_default_cache_settings,
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get_or_create_region,
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make_region,
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str2bool,
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)
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module_name = 'rhodecode'
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register_backend(
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"dogpile.cache.rc.memory_lru", f"{module_name}.lib.rc_cache.backends",
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"LRUMemoryBackend")
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register_backend(
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"dogpile.cache.rc.file_namespace", f"{module_name}.lib.rc_cache.backends",
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"FileNamespaceBackend")
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register_backend(
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"dogpile.cache.rc.redis", f"{module_name}.lib.rc_cache.backends",
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"RedisPickleBackend")
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register_backend(
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"dogpile.cache.rc.redis_msgpack", f"{module_name}.lib.rc_cache.backends",
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"RedisMsgPackBackend")
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log = logging.getLogger(__name__)
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FILE_TREE_CACHE_VER = 'v4'
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LICENSE_CACHE_VER = 'v2'
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CLEAR_DELETE = 'delete'
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CLEAR_INVALIDATE = 'invalidate'
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def async_creation_runner(cache, somekey, creator, mutex):
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def runner():
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try:
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value = creator()
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cache.set(somekey, value)
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finally:
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mutex.release()
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thread = threading.Thread(target=runner)
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thread.start()
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def configure_dogpile_cache(settings):
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cache_dir = settings.get('cache_dir')
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if cache_dir:
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region_meta.dogpile_config_defaults['cache_dir'] = cache_dir
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rc_cache_data = get_default_cache_settings(settings, prefixes=['rc_cache.'])
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# inspect available namespaces
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avail_regions = set()
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for key in rc_cache_data.keys():
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namespace_name = key.split('.', 1)[0]
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if namespace_name in avail_regions:
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continue
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avail_regions.add(namespace_name)
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log.debug('dogpile: found following cache regions: %s', namespace_name)
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new_region = make_region(
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name=namespace_name,
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function_key_generator=None,
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async_creation_runner=None
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)
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new_region.configure_from_config(settings, f'rc_cache.{namespace_name}.')
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new_region.function_key_generator = backend_key_generator(new_region.actual_backend)
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async_creator = str2bool(settings.pop(f'rc_cache.{namespace_name}.async_creator', 'false'))
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if async_creator:
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log.debug('configuring region %s with async creator', new_region)
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new_region.async_creation_runner = async_creation_runner
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if log.isEnabledFor(logging.DEBUG):
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region_args = dict(backend=new_region.actual_backend,
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region_invalidator=new_region.region_invalidator.__class__)
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log.debug('dogpile: registering a new region `%s` %s', namespace_name, region_args)
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region_meta.dogpile_cache_regions[namespace_name] = new_region
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def includeme(config):
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configure_dogpile_cache(config.registry.settings)
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