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"""Causes the keyedcache to also use a first-level cache in memory - this can cut 30-40% of memcached calls.
To enable, add this to some models.py file in an app::
from keyedcache import threaded
threaded.start_listening()
"""
from threaded_multihost import threadlocals
from django.core.signals import request_started, request_finished
from keyedcache import cache_clear_request, cache_use_request_caching
import random
import logging
log = logging.getLogger('keyedcache.threaded')
def set_request_uid(sender, *args, **kwargs):
"""Puts a unique id into the thread"""
tid = random.randrange(1,10000000)
threadlocals.set_thread_variable('request_uid', tid)
#log.debug('request UID: %s', tid)
def clear_request_uid(sender, *args, **kwargs):
"""Removes the thread cache for this request"""
tid = threadlocals.get_thread_variable('request_uid', -1)
if tid > -1:
cache_clear_request(tid)
def start_listening():
log.debug('setting up threaded keyedcache')
cache_use_request_caching()
request_started.connect(set_request_uid)
request_finished.connect(clear_request_uid)
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