ronny-cache - async function cacher

Do you sometimes have asynchronous functions that do slow things, like parsing files, requesting APIs or doing 10 SQL queries with tons of JOINs in them?

Worry no more.

Ronny Cache is there to help.

What it does.

ronny-cache is a node module that wraps asynchronous functions and caches their results in Redis.

How to use it.

Just wrap your slow function with ronny.

var Ronny = require('ronny-cache');
var ronny = new Ronny({
  /* db connection string, uses in-memory caching when empty */
  db: process.env.REDIS_URL
  /* optional */
, maxAge: '2s' // string that can be parsed by monent.js
});

/* the arguments have to be serialisable via JSON.stringify */
function mySlowApiFileParserQuery(a, b, c, callback) {
  // ... lots of slow stuff here ...
  callback(null, results);
}

var cachedFunction = ronny.wrap(mySlowApiFileParserQuery);

Here's a list of time aliases for maxTime: https://npmjs.org/package/english-time#ref

TODO

• support promises to be cached (pull-requests welcome)
• more kinds of stores (like MongoDB, or in-memory)