LRU Cache in Node js

Question

I need to implement caching for my project(for my organisation), we are planing to have a in-memory LRU caching, I have got some packages but I am not sure about the licensing term, the best I found was this

https://www.npmjs.com/package/lru-cache

but here I am facing some issues when I declare my cache as

   var LRU = require("lru-cache")
  , options = { max: 2
              , length: function (n, key) { return n * 2 + key.length }
              , dispose: function (key, n) { n.close() }
              , maxAge: 1000 * 60 * 60 }
  , cache = LRU(options)
  console.log(cache.length)
  cache.set(1,1)
  cache.set(2,2)
  cache.set(3,3)
  console.log(cache.length)
  console.log(cache.get(1))
  console.log(cache.get(2))
  console.log(cache.get(3))
  console.log(cache)

The output which I get for above code is

0
NaN
1
2
3
LRUCache {}

It doesn't set the max value and it's seems to be infinity Even If the length is 2 it is not removing the LRU element and adding all three element in the cache

Is any other package available ?, I am also thinking to implement my own caching mechanism, what is the best practice for node js.

LRU Cache in Node js

1 Answers