lru-maxAge-close-connection.js

const LRU = require("lru-cache");


async function test1() {
  console.log('TEST1')
  const cache = new LRU({
    max: 1,
    dispose: function (key, n) {
      console.log('close', key, n)
    },
    maxAge: 1e3
  });


  cache.set('connection-1', 'CONNECTION_VALUE_1')
  cache.set('connection-1', 'CONNECTION_VALUE_2')
  cache.set('connection-2', 'CONNECTION_VALUE_2')
}


async function test2() {
  console.log('TEST2')
  const maxAge = 1e3;
  const cache = new LRU({
    max: 100,
    dispose: function (key, n) {
      console.log('close', key, n)
    },
    maxAge: maxAge,
    length: (n, key) => {
      // console.log('LEN', n, key)
      setTimeout(() => cache.get(key), maxAge + 1)
      return 1;
    }
  });


  cache.set('connection-1', 'CONNECTION_VALUE_1')
  // console.log('GET-1', cache.get('connection-1'))
  // await new Promise((resolve) => {
  //   setTimeout(resolve, 2e3)
  // })

  // console.log('GET-2', cache.get('connection-1'))
  // cache.set('connection-1', 'CONNECTION_VALUE_2')
}

async function test() {
  await test1()
  await test2()
}

test().catch(console.error)