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from mako import exceptions
try:
from beaker import cache
cache = cache.CacheManager()
except ImportError:
cache = None
class Cache(object):
def __init__(self, id, starttime):
self.id = id
self.starttime = starttime
self.def_regions = {}
def put(self, key, value, **kwargs):
defname = kwargs.pop('defname', None)
expiretime = kwargs.pop('expiretime', None)
createfunc = kwargs.pop('createfunc', None)
self._get_cache(defname, **kwargs).put_value(key, starttime=self.starttime, expiretime=expiretime)
def get(self, key, **kwargs):
defname = kwargs.pop('defname', None)
expiretime = kwargs.pop('expiretime', None)
createfunc = kwargs.pop('createfunc', None)
return self._get_cache(defname, **kwargs).get_value(key, starttime=self.starttime, expiretime=expiretime, createfunc=createfunc)
def invalidate(self, key, **kwargs):
defname = kwargs.pop('defname', None)
expiretime = kwargs.pop('expiretime', None)
createfunc = kwargs.pop('createfunc', None)
self._get_cache(defname, **kwargs).remove_value(key, starttime=self.starttime, expiretime=expiretime)
def invalidate_body(self):
self.invalidate('render_body', defname='render_body')
def invalidate_def(self, name):
self.invalidate('render_%s' % name, defname='render_%s' % name)
def invalidate_closure(self, name):
self.invalidate(name, defname=name)
def _get_cache(self, defname, type=None, **kw):
if not cache:
raise exceptions.RuntimeException("the Beaker package is required to use cache functionality.")
if type == 'memcached':
type = 'ext:memcached'
if not type:
(type, kw) = self.def_regions.get(defname, ('memory', {}))
else:
self.def_regions[defname] = (type, kw)
return cache.get_cache(self.id, type=type, **kw)
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