https://github.com/focusaurus/deli-counter

https://github.com/focusaurus/deli-counter

Last synced: 12 days ago
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• Host: GitHub
• URL: https://github.com/focusaurus/deli-counter
• Owner: focusaurus
• Created: 2013-11-23T01:46:48.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-01-05T19:59:22.000Z (almost 11 years ago)
• Last Synced: 2024-04-10T19:43:05.077Z (7 months ago)
• Language: JavaScript
• Size: 133 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
#Deli Counter

Provides the ability to provide "Now Serving" style small integers across a set of values.

![Now Serving](http://arewefullyet.com/images/2013/06/now-serving.jpg)

The idea is say you have unfriendly values like session IDs in a web application, but you want to assign friendly numbers like "Session 1", "Session 2" to them, that's what this module will do for you.

## MemoryDeliCounter

Stores values in memory. OK for small in-process things.

    var counter = new require('deli-counter').MemoryDeliCounter;

## MongoDeliCounter

Stores values in mongodb. Driving use case was mapping web session IDs to small integers, so a `getActive` function such as

    function getActive(mongoClient, sessionIds, callback) {

      mongoClient.collection("sessions").find(

          {_id: {$in: sessionIds}}, ["_id"]).toArray(function (error, sessions) {

        if (error) {

          callback(error);

          return;

        }

        callback(null, sessions.map(function (session) {return session._id;}));

      });

    }

    var options = {

      mongoClient: aConnectedMongodbInstance,

      getActive: getActive

    };

    var counter = new MongoDeliCounter(options);

    counter.add("sessionId1", function (error, position) {

      console.log("Added sessionId1 to deli counter at position", position);

    });

## RedisDeliCounter (Not yet entirely correct)

Stores values in redis. There will be basically 2 sets of interest. The "big set" which is normally your session store, and the internal delicounter set where we keep the small numbers.