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make cache

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This commit is contained in:
Cloud Wu
2015-11-13 13:25:33 +08:00
parent 107be7ee8c
commit 30859a1244
1 changed files with 19 additions and 10 deletions
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29
lualib/redis.lua
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@@ -98,28 +98,37 @@ end
-- msg could be any type of value
local header_cache = setmetatable({}, {
__mode = "kv",
__index = function(t,k)
local function make_cache(f)
return setmetatable({}, {
__mode = "kv",
__index = f,
})
end
local header_cache = make_cache(function(t,k)
local s = "\r\n$" .. k .. "\r\n"
t[k] = s
return s
end})
end)
local command_cache = setmetatable({}, {
__mode = "kv",
__index = function(t,cmd)
local command_cache = make_cache(function(t,cmd)
local s = "\r\n$"..#cmd.."\r\n"..cmd:upper()
t[cmd] = s
return s
end})
end)
local count_cache = make_cache(function(t,k)
local s = "*" .. k
t[k] = s
return s
end)
local function compose_message(cmd, msg)
local t = type(msg)
local lines = {}
if t == "table" then
lines[1] = "*" .. (#msg+1)
lines[1] = count_cache[#msg+1]
lines[2] = command_cache[cmd]
local idx = 3
for _,v in ipairs(msg) do
@@ -171,7 +180,7 @@ end
local function compose_table(lines, msg)
local tinsert = table.insert
tinsert(lines, "*" .. #msg)
tinsert(lines, count_cache[#msg])
for _,v in ipairs(msg) do
v = tostring(v)
tinsert(lines,header_cache[#v])