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91 lines
2.9 KiB
91 lines
2.9 KiB
6 years ago
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"""
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Mako Integration
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----------------
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dogpile.cache includes a `Mako <http://www.makotemplates.org>`_ plugin
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that replaces `Beaker <http://beaker.groovie.org>`_
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as the cache backend.
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Setup a Mako template lookup using the "dogpile.cache" cache implementation
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and a region dictionary::
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from dogpile.cache import make_region
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from mako.lookup import TemplateLookup
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my_regions = {
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"local":make_region().configure(
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"dogpile.cache.dbm",
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expiration_time=360,
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arguments={"filename":"file.dbm"}
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),
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"memcached":make_region().configure(
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"dogpile.cache.pylibmc",
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expiration_time=3600,
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arguments={"url":["127.0.0.1"]}
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)
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}
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mako_lookup = TemplateLookup(
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directories=["/myapp/templates"],
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cache_impl="dogpile.cache",
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cache_args={
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'regions':my_regions
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}
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)
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To use the above configuration in a template, use the ``cached=True``
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argument on any Mako tag which accepts it, in conjunction with the
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name of the desired region as the ``cache_region`` argument::
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<%def name="mysection()" cached="True" cache_region="memcached">
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some content that's cached
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</%def>
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"""
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from mako.cache import CacheImpl
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class MakoPlugin(CacheImpl):
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"""A Mako ``CacheImpl`` which talks to dogpile.cache."""
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def __init__(self, cache):
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super(MakoPlugin, self).__init__(cache)
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try:
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self.regions = self.cache.template.cache_args['regions']
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except KeyError:
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raise KeyError(
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"'cache_regions' argument is required on the "
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"Mako Lookup or Template object for usage "
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"with the dogpile.cache plugin.")
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def _get_region(self, **kw):
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try:
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region = kw['region']
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except KeyError:
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raise KeyError(
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"'cache_region' argument must be specified with 'cache=True'"
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"within templates for usage with the dogpile.cache plugin.")
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try:
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return self.regions[region]
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except KeyError:
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raise KeyError("No such region '%s'" % region)
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def get_and_replace(self, key, creation_function, **kw):
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expiration_time = kw.pop("timeout", None)
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return self._get_region(**kw).get_or_create(
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key, creation_function,
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expiration_time=expiration_time)
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def get_or_create(self, key, creation_function, **kw):
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return self.get_and_replace(key, creation_function, **kw)
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def put(self, key, value, **kw):
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self._get_region(**kw).put(key, value)
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def get(self, key, **kw):
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expiration_time = kw.pop("timeout", None)
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return self._get_region(**kw).get(key, expiration_time=expiration_time)
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def invalidate(self, key, **kw):
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self._get_region(**kw).delete(key)
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