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-- Lua script to perform cache checking for bayes classification
-- This script accepts the following parameters:
-- key1 - cache id
-- key2 - configuration table in message pack
local cache_id = KEYS[1]
local conf = cmsgpack.unpack(KEYS[2])
cache_id = string.sub(cache_id, 1, conf.cache_elt_len)
-- Try each prefix that is in Redis
for i = 0, conf.cache_max_keys do
local prefix = conf.cache_prefix .. string.rep("X", i)
local have = redis.call('HGET', prefix, cache_id)
if have then
return tonumber(have)
end
end
return nil
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