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code: update copyrights to 2020
code: update copyrights to 2020

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# RhodeCode VCSServer provides access to different vcs backends via network.
# Copyright (C) 2014-2020 RhodeCode GmbH
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import os
import logging
import functools
from decorator import decorate
from dogpile.cache import CacheRegion
from dogpile.cache.util import compat
from vcsserver.utils import safe_str, sha1
log = logging.getLogger(__name__)
class RhodeCodeCacheRegion(CacheRegion):
def conditional_cache_on_arguments(
self, namespace=None,
Custom conditional decorator, that will not touch any dogpile internals if
condition isn't meet. This works a bit different than should_cache_fn
And it's faster in cases we don't ever want to compute cached values
expiration_time_is_callable = compat.callable(expiration_time)
if function_key_generator is None:
function_key_generator = self.function_key_generator
def get_or_create_for_user_func(key_generator, user_func, *arg, **kw):
if not condition:
log.debug('Calling un-cached func:%s', user_func.func_name)
return user_func(*arg, **kw)
key = key_generator(*arg, **kw)
timeout = expiration_time() if expiration_time_is_callable \
else expiration_time
log.debug('Calling cached fn:%s', user_func.func_name)
return self.get_or_create(key, user_func, timeout, should_cache_fn, (arg, kw))
def cache_decorator(user_func):
if to_str is compat.string_type:
# backwards compatible
key_generator = function_key_generator(namespace, user_func)
key_generator = function_key_generator(namespace, user_func, to_str=to_str)
def refresh(*arg, **kw):
Like invalidate, but regenerates the value instead
key = key_generator(*arg, **kw)
value = user_func(*arg, **kw)
self.set(key, value)
return value
def invalidate(*arg, **kw):
key = key_generator(*arg, **kw)
def set_(value, *arg, **kw):
key = key_generator(*arg, **kw)
self.set(key, value)
def get(*arg, **kw):
key = key_generator(*arg, **kw)
return self.get(key)
user_func.set = set_
user_func.invalidate = invalidate
user_func.get = get
user_func.refresh = refresh
user_func.key_generator = key_generator
user_func.original = user_func
# Use `decorate` to preserve the signature of :param:`user_func`.
return decorate(user_func, functools.partial(
get_or_create_for_user_func, key_generator))
return cache_decorator
def make_region(*arg, **kw):
return RhodeCodeCacheRegion(*arg, **kw)
def get_default_cache_settings(settings, prefixes=None):
prefixes = prefixes or []
cache_settings = {}
for key in settings.keys():
for prefix in prefixes:
if key.startswith(prefix):
name = key.split(prefix)[1].strip()
val = settings[key]
if isinstance(val, compat.string_types):
val = val.strip()
cache_settings[name] = val
return cache_settings
def compute_key_from_params(*args):
Helper to compute key from given params to be used in cache manager
return sha1("_".join(map(safe_str, args)))
def backend_key_generator(backend):
Special wrapper that also sends over the backend to the key generator
def wrapper(namespace, fn):
return key_generator(backend, namespace, fn)
return wrapper
def key_generator(backend, namespace, fn):
fname = fn.__name__
def generate_key(*args):
backend_prefix = getattr(backend, 'key_prefix', None) or 'backend_prefix'
namespace_pref = namespace or 'default_namespace'
arg_key = compute_key_from_params(*args)
final_key = "{}:{}:{}_{}".format(backend_prefix, namespace_pref, fname, arg_key)
return final_key
return generate_key