example.lua

local luvel = require("luvel")
local db = luvel.open("./tmp", { createIfMissing = true })

local major, minor = luvel.version()
print("LevelDB Version: " .. string.format("%s.%s", major, minor))

print("Get k1 => " .. (db:get("k1") or "'nil'"))
print("Get k2 => " .. (db:get("k2") or "'nil'"))
print("Get unset_key => " .. (db:get("unset_key") or "'nil'"))
print("")

function print_db_data()
  print("Iterator all keys")

  for k, v in pairs(db) do print(k, v) end
  print("")
end

print("Set k3")
db:put("k3", tostring(os.time()))
print("")

print("Batch set k1 k2 k4 k5")

db:batchPut({
  k1 = tostring(os.time()),
  k2 = "321321",
  k4 = "111",
  k5 = "222"
})

print("")

print_db_data()

print("Del k3")
db:del("k3")
print("")

print_db_data()

print("Batch del k4, k5")
db:batchDel({ "k4", "k5" })
print("")

print_db_data()

print("close")
db:close()

print("destroy")
luvel.destroy("./tmp")

print("end")

-- Force GC to stress test that everything cleans up properly.
collectgarbage()