Current File : //proc/227033/root/opt/alt/python27/lib/python2.7/site-packages/beaker/container.pyc
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� Z d � Z d � Z d � Z RS( s� Handles dictionary operations and locking for a namespace of
values.
The implementation for setting and retrieving the namespace data is
handled by subclasses.
NamespaceManager may be used alone, or may be privately accessed by
one or more Container objects. Container objects provide per-key
services like expiration times and automatic recreation of values.
Multiple NamespaceManagers created with a particular name will all
share access to the same underlying datasource and will attempt to
synchronize against a common mutex object. The scope of this
sharing may be within a single process or across multiple
processes, depending on the type of NamespaceManager used.
The NamespaceManager itself is generally threadsafe, except in the
case of the DBMNamespaceManager in conjunction with the gdbm dbm
implementation.
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ensure that the dictionary will not be used by any other namespace.
e.g.::
import collections
cached_data = collections.defaultdict(dict)
class MyDictionaryManager(AbstractDictionaryNSManager):
def __init__(self, namespace):
AbstractDictionaryNSManager.__init__(self, namespace)
self.dictionary = cached_data[self.namespace]
The above stores data in a global dictionary called "cached_data",
which is structured as a dictionary of dictionaries, keyed
first on namespace name to a sub-dictionary, then on actual
cache key to value.
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