def incr_key(stat_key, amount):
try:
total = rdb.incr(stat_key, amount)
except redis.exceptions.ResponseError:
rdb.delete(stat_key)
total = rdb.incr(stat_key, amount)
return total
def clear_mc(target, amount):
post_id = target.post_id
tag_name = Tag.get(target.tag_id).name
for ident in (post_id, tag_name):
total = incr_key(MC_KEY_POST_STATS_BY_TAG % ident, amount)
pages = math.ceil((max(total, 0) or 1) / PER_PAGE)
for p in range(1, pages + 1):
rdb.delete(MC_KEY_POSTS_BY_TAG % (ident, p))
def clear_mc(cls, target, amount):
to_id = target.to_id
from_id = target.from_id
st = userFollowStats.get_or_create(to_id)
follower_count = st.follower_count or 0
st.follower_count = follower_count + amount
st.save()
st = userFollowStats.get_or_create(from_id)
following_count = st.following_count or 0
st.following_count = following_count + amount
st.save()
rdb.delete(MC_KEY_FOLLOW_ITEM % (from_id, to_id))
for user_id, total, mc_key in (
(to_id, follower_count, MC_KEY_FOLLOWERS),
(from_id, following_count, MC_KEY_FOLLOWING)):
pages = math.ceil((max(total, 0) or 1) / PER_PAGE)
for p in range(1, pages + 1):
rdb.delete(mc_key % (user_id, p))
def clear_mc(cls, target, amount):
"""
清除和target相关的缓存，修改缓存中MC_KEY_STATS_N的值
"""
action_type = cls.action_type
assert action_type
target_id = target.target_id
target_kind = target.target_kind
stat_key = MC_KEY_STATS_N % (action_type, target_id, target_kind)
total = incr_key(stat_key, amount)
pages = math.ceil((max(total, 0) or 1) / PER_PAGE) # ceil 舍弃小数部分向前进1位
user_id = target.user_id
rdb.delete(MC_KEY_ACTION_ITEM_BY_UESR % (action_type, user_id,
target_id, target_kind))
for p in list(range(1, pages + 1)) + [None]:
rdb.delete(MC_KEY_ACTION_ITEMS % (action_type, target_id,
target_kind, p))
# mc by user
stat_key = MC_KEY_BY_UESR_STATS_N % (action_type, user_id, target_kind)
total = incr_key(stat_key, amount)
pages = math.ceil((max(total, 0) or 1) / PER_PAGE)
for p in range(1, pages + 1):
rdb.delete(MC_KEY_ACTION_ITEMS_BY_UESR % (
action_type, user_id, target_kind, p))
def __flush_event__(cls, target):
rdb.delete(MC_KEY_ALL_TAGS)
def clear_mc(cls, id, kind):
rdb.delete(ITEM_MC_KEY.format(id, kind))