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tornado: Don't attempt to populate the memcached on restart. 

Later, we can fork off a separate process to do that task, but for
now, we can just rely on the fact that unless the server was just
rebooted, the relevant messages will already be in that cache, and
even if it was, getting the needed messages once each is not a
particularly expensive query.

(imported from commit 6d08eba1b41237fd4e1204e181ce8f227573930d)
This commit is contained in:
Tim Abbott 2013-01-11 18:02:23 -05:00
parent d121c51584
commit bea03548c2
1 changed files with 6 additions and 3 deletions
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9
zephyr/tornadoviews.py
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@ -62,13 +62,16 @@ def add_pointer_update_callback(user_profile, cb):
# * O(k) read of highest k message ids
# * Automatic maximum size support.
user_messages = {}
CACHE_COUNT = 25000
USERMESSAGE_CACHE_COUNT = 25000
cache_minimum_id = sys.maxint
def initialize_user_messages():
global cache_minimum_id
max_message_id, cache_minimum_id = populate_message_cache(CACHE_COUNT)
try:
cache_minimum_id = Message.objects.all().order_by("-id")[0].id - USERMESSAGE_CACHE_COUNT
except Message.DoesNotExist:
cache_minimum_id = 1
for um in UserMessage.objects.filter(message_id__gt=max_message_id - CACHE_COUNT).order_by("message"):
for um in UserMessage.objects.filter(message_id__gte=cache_minimum_id).order_by("message"):
add_user_message(um.user_profile_id, um.message_id)
def add_user_message(user_profile_id, message_id):