Python django.core.cache.get_cache() Examples

def _incr_cache(self):
        if not self.cache_keys:
            return {}

        cache = get_cache(settings.ST_RATELIMIT_CACHE)
        cache_values = cache.get_many(self.cache_keys)

        for key in self.cache_keys:
            if key in cache_values:
                cache_values[key] += 1
            else:
                cache_values[key] = 1

        cache.set_many(cache_values, timeout=self.time)
        return cache_values 

def get_cache_key(request, key_prefix=None, method='GET', cache=None):
    """
    Returns a cache key based on the request path and query. It can be used
    in the request phase because it pulls the list of headers to take into
    account from the global path registry and uses those to build a cache key
    to check against.

    If there is no headerlist stored, the page needs to be rebuilt, so this
    function returns None.
    """
    if key_prefix is None:
        key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
    cache_key = _generate_cache_header_key(key_prefix, request)
    if cache is None:
        cache = get_cache(settings.CACHE_MIDDLEWARE_ALIAS)
    headerlist = cache.get(cache_key, None)
    if headerlist is not None:
        return _generate_cache_key(request, method, headerlist, key_prefix)
    else:
        return None 

def cache(self):
        """Memoize access to the cache backend."""
        if self._cache is None:
            self._cache = django_cache.get_cache(self.cache_name)
        return self._cache 

def index_context():
    if settings.ENABLE_CACHING:
        context = get_cache('persistent').get('home.index_context')
    else:
        context = {}
    if not context:
        context = update_index_context_task()
    return context 

def __init__(self):
        self.cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
        self.key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
        self.cache_anonymous_only = getattr(settings, 'CACHE_MIDDLEWARE_ANONYMOUS_ONLY', False)
        self.cache_alias = settings.CACHE_MIDDLEWARE_ALIAS
        self.cache = get_cache(self.cache_alias) 

def __init__(self):
        self.cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
        self.key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
        self.cache_anonymous_only = getattr(settings, 'CACHE_MIDDLEWARE_ANONYMOUS_ONLY', False)
        self.cache_alias = settings.CACHE_MIDDLEWARE_ALIAS
        self.cache = get_cache(self.cache_alias) 

def __init__(self, cache_timeout=None, cache_anonymous_only=None, **kwargs):
        # We need to differentiate between "provided, but using default value",
        # and "not provided". If the value is provided using a default, then
        # we fall back to system defaults. If it is not provided at all,
        # we need to use middleware defaults.

        cache_kwargs = {}

        try:
            self.key_prefix = kwargs['key_prefix']
            if self.key_prefix is not None:
                cache_kwargs['KEY_PREFIX'] = self.key_prefix
            else:
                self.key_prefix = ''
        except KeyError:
            self.key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
            cache_kwargs['KEY_PREFIX'] = self.key_prefix

        try:
            self.cache_alias = kwargs['cache_alias']
            if self.cache_alias is None:
                self.cache_alias = DEFAULT_CACHE_ALIAS
            if cache_timeout is not None:
                cache_kwargs['TIMEOUT'] = cache_timeout
        except KeyError:
            self.cache_alias = settings.CACHE_MIDDLEWARE_ALIAS
            if cache_timeout is None:
                cache_kwargs['TIMEOUT'] = settings.CACHE_MIDDLEWARE_SECONDS
            else:
                cache_kwargs['TIMEOUT'] = cache_timeout

        if cache_anonymous_only is None:
            self.cache_anonymous_only = getattr(settings, 'CACHE_MIDDLEWARE_ANONYMOUS_ONLY', False)
        else:
            self.cache_anonymous_only = cache_anonymous_only

        self.cache = get_cache(self.cache_alias, **cache_kwargs)
        self.cache_timeout = self.cache.default_timeout 

def learn_cache_key(request, response, cache_timeout=None, key_prefix=None, cache=None):
    """
    Learns what headers to take into account for some request path from the
    response object. It stores those headers in a global path registry so that
    later access to that path will know what headers to take into account
    without building the response object itself. The headers are named in the
    Vary header of the response, but we want to prevent response generation.

    The list of headers to use for cache key generation is stored in the same
    cache as the pages themselves. If the cache ages some data out of the
    cache, this just means that we have to build the response once to get at
    the Vary header and so at the list of headers to use for the cache key.
    """
    if key_prefix is None:
        key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
    if cache_timeout is None:
        cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
    cache_key = _generate_cache_header_key(key_prefix, request)
    if cache is None:
        cache = get_cache(settings.CACHE_MIDDLEWARE_ALIAS)
    if response.has_header('Vary'):
        headerlist = ['HTTP_'+header.upper().replace('-', '_')
                      for header in cc_delim_re.split(response['Vary'])]
        cache.set(cache_key, headerlist, cache_timeout)
        return _generate_cache_key(request, request.method, headerlist, key_prefix)
    else:
        # if there is no Vary header, we still need a cache key
        # for the request.get_full_path()
        cache.set(cache_key, [], cache_timeout)
        return _generate_cache_key(request, request.method, [], key_prefix) 

def _get_locale_list():
    """Return a list of locales only for those having 2-letter codes
    """
    local_cache = cache.get_cache('default')
    locale_list_in_cache = local_cache.get('locale')

    if locale_list_in_cache:
        return locale_list_in_cache

    response = api.get('orgs', 'OCL', 'sources', 'Locales', 'concepts', params={'limit': 0})

    if response.status_code == 404:
        locale_list = [{'code': 'en', 'name': 'en - English'}]
        return locale_list

    locale_list = [
        {
            'code': locale['locale'],
            'name': locale['display_name'] + ' [' + locale['locale'] + ']'
        }
        for locale in response.json() if locale['locale']
        ]
    locale_list.sort()

    day_time_as_minutes = 24 * 60 * 60

    local_cache.set('locale', locale_list, day_time_as_minutes)
    return locale_list 

def get_cached_choices(self):
        if not self.cache_config['enabled']:
            return None
        c = get_cache(self.cache_config['cache'])
        return c.get(self.cache_config['key']%self.field_path) 

def set_cached_choices(self,choices):
        if not self.cache_config['enabled']:
            return
        c = get_cache(self.cache_config['cache'])
        return c.set(self.cache_config['key']%self.field_path,choices) 

def increment_counter(self):
        cache = get_cache('default')
        try:
            cache.incr(self.COUNTER_CACHE_KEY)
        except ValueError:
            cache.set(self.COUNTER_CACHE_KEY, 1, self.PERIOD_LENGTH_IN_SECONDS)
        return cache.get(self.COUNTER_CACHE_KEY) 

def get_cache(cache_name):
    if hasattr(caches, '__call__'):
        return caches(cache_name)
    return caches[cache_name] 

def _get_cache_by_alias(alias):
        if alias == DEFAULT_CACHE_ALIAS:
            from django.core.cache import cache
        else:
            try:
                from django.core.cache import caches
                cache = caches[alias]
            except ImportError:
                from django.core.cache import get_cache
                cache = get_cache(alias)
        return cache 

def __init__(self, cache_timeout=None, cache_anonymous_only=None, **kwargs):
        # We need to differentiate between "provided, but using default value",
        # and "not provided". If the value is provided using a default, then
        # we fall back to system defaults. If it is not provided at all,
        # we need to use middleware defaults.

        cache_kwargs = {}

        try:
            self.key_prefix = kwargs['key_prefix']
            if self.key_prefix is not None:
                cache_kwargs['KEY_PREFIX'] = self.key_prefix
            else:
                self.key_prefix = ''
        except KeyError:
            self.key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
            cache_kwargs['KEY_PREFIX'] = self.key_prefix

        try:
            self.cache_alias = kwargs['cache_alias']
            if self.cache_alias is None:
                self.cache_alias = DEFAULT_CACHE_ALIAS
            if cache_timeout is not None:
                cache_kwargs['TIMEOUT'] = cache_timeout
        except KeyError:
            self.cache_alias = settings.CACHE_MIDDLEWARE_ALIAS
            if cache_timeout is None:
                cache_kwargs['TIMEOUT'] = settings.CACHE_MIDDLEWARE_SECONDS
            else:
                cache_kwargs['TIMEOUT'] = cache_timeout

        if cache_anonymous_only is None:
            self.cache_anonymous_only = getattr(settings, 'CACHE_MIDDLEWARE_ANONYMOUS_ONLY', False)
        else:
            self.cache_anonymous_only = cache_anonymous_only

        if self.cache_anonymous_only:
            msg = "CACHE_MIDDLEWARE_ANONYMOUS_ONLY has been deprecated and will be removed in Django 1.8."
            warnings.warn(msg, PendingDeprecationWarning, stacklevel=1)

        self.cache = get_cache(self.cache_alias, **cache_kwargs)
        self.cache_timeout = self.cache.default_timeout