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- """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(BeakerCacheImpl, self).__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)
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