|
|
# -*- coding: utf-8 -*-
|
|
|
|
|
|
# Copyright (C) 2015-2020 RhodeCode GmbH
|
|
|
#
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
|
# it under the terms of the GNU Affero General Public License, version 3
|
|
|
# (only), as published by the Free Software Foundation.
|
|
|
#
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
# GNU General Public License for more details.
|
|
|
#
|
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
#
|
|
|
# This program is dual-licensed. If you wish to learn more about the
|
|
|
# RhodeCode Enterprise Edition, including its added features, Support services,
|
|
|
# and proprietary license terms, please see https://rhodecode.com/licenses/
|
|
|
|
|
|
import time
|
|
|
import errno
|
|
|
import logging
|
|
|
|
|
|
import msgpack
|
|
|
import gevent
|
|
|
import redis
|
|
|
|
|
|
from dogpile.cache.api import CachedValue
|
|
|
from dogpile.cache.backends import memory as memory_backend
|
|
|
from dogpile.cache.backends import file as file_backend
|
|
|
from dogpile.cache.backends import redis as redis_backend
|
|
|
from dogpile.cache.backends.file import NO_VALUE, compat, FileLock
|
|
|
from dogpile.cache.util import memoized_property
|
|
|
|
|
|
from rhodecode.lib.memory_lru_dict import LRUDict, LRUDictDebug
|
|
|
|
|
|
|
|
|
_default_max_size = 1024
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
|
|
|
class LRUMemoryBackend(memory_backend.MemoryBackend):
|
|
|
key_prefix = 'lru_mem_backend'
|
|
|
pickle_values = False
|
|
|
|
|
|
def __init__(self, arguments):
|
|
|
max_size = arguments.pop('max_size', _default_max_size)
|
|
|
|
|
|
LRUDictClass = LRUDict
|
|
|
if arguments.pop('log_key_count', None):
|
|
|
LRUDictClass = LRUDictDebug
|
|
|
|
|
|
arguments['cache_dict'] = LRUDictClass(max_size)
|
|
|
super(LRUMemoryBackend, self).__init__(arguments)
|
|
|
|
|
|
def delete(self, key):
|
|
|
try:
|
|
|
del self._cache[key]
|
|
|
except KeyError:
|
|
|
# we don't care if key isn't there at deletion
|
|
|
pass
|
|
|
|
|
|
def delete_multi(self, keys):
|
|
|
for key in keys:
|
|
|
self.delete(key)
|
|
|
|
|
|
|
|
|
class PickleSerializer(object):
|
|
|
|
|
|
def _dumps(self, value, safe=False):
|
|
|
try:
|
|
|
return compat.pickle.dumps(value)
|
|
|
except Exception:
|
|
|
if safe:
|
|
|
return NO_VALUE
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
def _loads(self, value, safe=True):
|
|
|
try:
|
|
|
return compat.pickle.loads(value)
|
|
|
except Exception:
|
|
|
if safe:
|
|
|
return NO_VALUE
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
|
|
|
class MsgPackSerializer(object):
|
|
|
|
|
|
def _dumps(self, value, safe=False):
|
|
|
try:
|
|
|
return msgpack.packb(value)
|
|
|
except Exception:
|
|
|
if safe:
|
|
|
return NO_VALUE
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
def _loads(self, value, safe=True):
|
|
|
"""
|
|
|
pickle maintained the `CachedValue` wrapper of the tuple
|
|
|
msgpack does not, so it must be added back in.
|
|
|
"""
|
|
|
try:
|
|
|
value = msgpack.unpackb(value, use_list=False)
|
|
|
return CachedValue(*value)
|
|
|
except Exception:
|
|
|
if safe:
|
|
|
return NO_VALUE
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
|
|
|
import fcntl
|
|
|
flock_org = fcntl.flock
|
|
|
|
|
|
|
|
|
class CustomLockFactory(FileLock):
|
|
|
|
|
|
@memoized_property
|
|
|
def _module(self):
|
|
|
|
|
|
def gevent_flock(fd, operation):
|
|
|
"""
|
|
|
Gevent compatible flock
|
|
|
"""
|
|
|
# set non-blocking, this will cause an exception if we cannot acquire a lock
|
|
|
operation |= fcntl.LOCK_NB
|
|
|
start_lock_time = time.time()
|
|
|
timeout = 60 * 15 # 15min
|
|
|
while True:
|
|
|
try:
|
|
|
flock_org(fd, operation)
|
|
|
# lock has been acquired
|
|
|
break
|
|
|
except (OSError, IOError) as e:
|
|
|
# raise on other errors than Resource temporarily unavailable
|
|
|
if e.errno != errno.EAGAIN:
|
|
|
raise
|
|
|
elif (time.time() - start_lock_time) > timeout:
|
|
|
# waited to much time on a lock, better fail than loop for ever
|
|
|
log.error('Failed to acquire lock on `%s` after waiting %ss',
|
|
|
self.filename, timeout)
|
|
|
raise
|
|
|
wait_timeout = 0.03
|
|
|
log.debug('Failed to acquire lock on `%s`, retry in %ss',
|
|
|
self.filename, wait_timeout)
|
|
|
gevent.sleep(wait_timeout)
|
|
|
|
|
|
fcntl.flock = gevent_flock
|
|
|
return fcntl
|
|
|
|
|
|
|
|
|
class FileNamespaceBackend(PickleSerializer, file_backend.DBMBackend):
|
|
|
key_prefix = 'file_backend'
|
|
|
|
|
|
def __init__(self, arguments):
|
|
|
arguments['lock_factory'] = CustomLockFactory
|
|
|
db_file = arguments.get('filename')
|
|
|
|
|
|
log.debug('initialing %s DB in %s', self.__class__.__name__, db_file)
|
|
|
try:
|
|
|
super(FileNamespaceBackend, self).__init__(arguments)
|
|
|
except Exception:
|
|
|
log.error('Failed to initialize db at: %s', db_file)
|
|
|
raise
|
|
|
|
|
|
def __repr__(self):
|
|
|
return '{} `{}`'.format(self.__class__, self.filename)
|
|
|
|
|
|
def list_keys(self, prefix=''):
|
|
|
prefix = '{}:{}'.format(self.key_prefix, prefix)
|
|
|
|
|
|
def cond(v):
|
|
|
if not prefix:
|
|
|
return True
|
|
|
|
|
|
if v.startswith(prefix):
|
|
|
return True
|
|
|
return False
|
|
|
|
|
|
with self._dbm_file(True) as dbm:
|
|
|
try:
|
|
|
return filter(cond, dbm.keys())
|
|
|
except Exception:
|
|
|
log.error('Failed to fetch DBM keys from DB: %s', self.get_store())
|
|
|
raise
|
|
|
|
|
|
def get_store(self):
|
|
|
return self.filename
|
|
|
|
|
|
def _dbm_get(self, key):
|
|
|
with self._dbm_file(False) as dbm:
|
|
|
if hasattr(dbm, 'get'):
|
|
|
value = dbm.get(key, NO_VALUE)
|
|
|
else:
|
|
|
# gdbm objects lack a .get method
|
|
|
try:
|
|
|
value = dbm[key]
|
|
|
except KeyError:
|
|
|
value = NO_VALUE
|
|
|
if value is not NO_VALUE:
|
|
|
value = self._loads(value)
|
|
|
return value
|
|
|
|
|
|
def get(self, key):
|
|
|
try:
|
|
|
return self._dbm_get(key)
|
|
|
except Exception:
|
|
|
log.error('Failed to fetch DBM key %s from DB: %s', key, self.get_store())
|
|
|
raise
|
|
|
|
|
|
def set(self, key, value):
|
|
|
with self._dbm_file(True) as dbm:
|
|
|
dbm[key] = self._dumps(value)
|
|
|
|
|
|
def set_multi(self, mapping):
|
|
|
with self._dbm_file(True) as dbm:
|
|
|
for key, value in mapping.items():
|
|
|
dbm[key] = self._dumps(value)
|
|
|
|
|
|
|
|
|
class BaseRedisBackend(redis_backend.RedisBackend):
|
|
|
|
|
|
def _create_client(self):
|
|
|
args = {}
|
|
|
|
|
|
if self.url is not None:
|
|
|
args.update(url=self.url)
|
|
|
|
|
|
else:
|
|
|
args.update(
|
|
|
host=self.host, password=self.password,
|
|
|
port=self.port, db=self.db
|
|
|
)
|
|
|
|
|
|
connection_pool = redis.ConnectionPool(**args)
|
|
|
|
|
|
return redis.StrictRedis(connection_pool=connection_pool)
|
|
|
|
|
|
def list_keys(self, prefix=''):
|
|
|
prefix = '{}:{}*'.format(self.key_prefix, prefix)
|
|
|
return self.client.keys(prefix)
|
|
|
|
|
|
def get_store(self):
|
|
|
return self.client.connection_pool
|
|
|
|
|
|
def get(self, key):
|
|
|
value = self.client.get(key)
|
|
|
if value is None:
|
|
|
return NO_VALUE
|
|
|
return self._loads(value)
|
|
|
|
|
|
def get_multi(self, keys):
|
|
|
if not keys:
|
|
|
return []
|
|
|
values = self.client.mget(keys)
|
|
|
loads = self._loads
|
|
|
return [
|
|
|
loads(v) if v is not None else NO_VALUE
|
|
|
for v in values]
|
|
|
|
|
|
def set(self, key, value):
|
|
|
if self.redis_expiration_time:
|
|
|
self.client.setex(key, self.redis_expiration_time,
|
|
|
self._dumps(value))
|
|
|
else:
|
|
|
self.client.set(key, self._dumps(value))
|
|
|
|
|
|
def set_multi(self, mapping):
|
|
|
dumps = self._dumps
|
|
|
mapping = dict(
|
|
|
(k, dumps(v))
|
|
|
for k, v in mapping.items()
|
|
|
)
|
|
|
|
|
|
if not self.redis_expiration_time:
|
|
|
self.client.mset(mapping)
|
|
|
else:
|
|
|
pipe = self.client.pipeline()
|
|
|
for key, value in mapping.items():
|
|
|
pipe.setex(key, self.redis_expiration_time, value)
|
|
|
pipe.execute()
|
|
|
|
|
|
def get_mutex(self, key):
|
|
|
if self.distributed_lock:
|
|
|
import redis_lock
|
|
|
lock_key = redis_backend.u('_lock_{0}').format(key)
|
|
|
log.debug('Trying to acquire Redis lock for key %s', lock_key)
|
|
|
lock = redis_lock.Lock(
|
|
|
redis_client=self.client,
|
|
|
name=lock_key,
|
|
|
expire=self.lock_timeout,
|
|
|
auto_renewal=False,
|
|
|
strict=True,
|
|
|
)
|
|
|
return lock
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
|
|
|
class RedisPickleBackend(PickleSerializer, BaseRedisBackend):
|
|
|
key_prefix = 'redis_pickle_backend'
|
|
|
pass
|
|
|
|
|
|
|
|
|
class RedisMsgPackBackend(MsgPackSerializer, BaseRedisBackend):
|
|
|
key_prefix = 'redis_msgpack_backend'
|
|
|
pass
|
|
|
|
