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# ext/beaker_cache.py
# Copyright 2006-2025 the Mako authors and contributors <see AUTHORS file>
#
# This module is part of Mako and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""Provide a :class:`.CacheImpl` for the Beaker caching system."""
from mako import exceptions
from mako.cache import CacheImpl
try:
from beaker import cache as beaker_cache
except:
has_beaker = False
else:
has_beaker = True
_beaker_cache = None
class BeakerCacheImpl(CacheImpl):
"""A :class:`.CacheImpl` provided for the Beaker caching system.
This plugin is used by default, based on the default
value of ``'beaker'`` for the ``cache_impl`` parameter of the
:class:`.Template` or :class:`.TemplateLookup` classes.
"""
def __init__(self, cache):
if not has_beaker:
raise exceptions.RuntimeException(
"Can't initialize Beaker plugin; Beaker is not installed."
)
global _beaker_cache
if _beaker_cache is None:
if "manager" in cache.template.cache_args:
_beaker_cache = cache.template.cache_args["manager"]
else:
_beaker_cache = beaker_cache.CacheManager()
super().__init__(cache)
def _get_cache(self, **kw):
expiretime = kw.pop("timeout", None)
if "dir" in kw:
kw["data_dir"] = kw.pop("dir")
elif self.cache.template.module_directory:
kw["data_dir"] = self.cache.template.module_directory
if "manager" in kw:
kw.pop("manager")
if kw.get("type") == "memcached":
kw["type"] = "ext:memcached"
if "region" in kw:
region = kw.pop("region")
cache = _beaker_cache.get_cache_region(self.cache.id, region, **kw)
else:
cache = _beaker_cache.get_cache(self.cache.id, **kw)
cache_args = {"starttime": self.cache.starttime}
if expiretime:
cache_args["expiretime"] = expiretime
return cache, cache_args
def get_or_create(self, key, creation_function, **kw):
cache, kw = self._get_cache(**kw)
return cache.get(key, createfunc=creation_function, **kw)
def put(self, key, value, **kw):
cache, kw = self._get_cache(**kw)
cache.put(key, value, **kw)
def get(self, key, **kw):
cache, kw = self._get_cache(**kw)
return cache.get(key, **kw)
def invalidate(self, key, **kw):
cache, kw = self._get_cache(**kw)
cache.remove_value(key, **kw)