add lua loader

service/datacenterd.lua

@@ -0,0 +1,43 @@
+local skynet = require "skynet"
+
+local command = {}
+local database = {}
+
+local function query(db, key, ...)
+	if key == nil then
+		return db
+	else
+		return query(db[key], ...)
+	end
+end
+
+function command.QUERY(key, ...)
+	local d = database[key]
+	if d then
+		return query(d, ...)
+	end
+end
+
+local function update(db, key, value, ...)
+	if select("#",...) == 0 then
+		local ret = db[key]
+		db[key] = value
+		return ret
+	else
+		if db[key] == nil then
+			db[key] = {}
+		end
+		return update(db[key], value, ...)
+	end
+end
+
+function command.UPDATE(...)
+	return update(database, ...)
+end
+
+skynet.start(function()
+	skynet.dispatch("lua", function (_, source, cmd, ...)
+		local f = assert(command[cmd])
+		skynet.ret(skynet.pack(f(source, ...)))
+	end)
+end)