realizehit-subscription

Subscription pattern handling for realizehit

Probably you might want to use realizehit/realizehit instead.

Installation

npm install --save realizehit-subscription

Usage

Subscription is used as a lib by other realizehit modules.

This lib is intended to generate and drive redis-valid patterns.

var redis = require( 'redis' )( /* ... */ );
var Subscription = require( 'realizehit-subscription' );
var subscription = new Subscription();

// Add a channel filter
subscription.pattern.add( 'channel', 'CNN' );

// Add a show filter
subscription.pattern.add( 'show', 'tvnews' );

// gather the channel needed by redis
redis.psubscribe( subscription.pattern );

FAQ

Why is this module separated from the core?

Because it is to be used on both repos.

Why don't you never use subscription object?

In fact we use it to store pattern, but methods on subscription should be handled on realizehit (or your app) to contain specific approaches that interact directly with pattern handling.

We need it as so because server and client has different methodologies for actions such as subscribe, unsubscribe and so on.

Pattern? Why Pattern?

We use Pattern Subscription (PSUBSCRIBE) on redis instead of SUBSCRIBE. It allows us to create a wide subscription methodology!

Example: Subscribe to entire CNN Shows.

var Subscription = require( 'realizehit-subscription' );
var subscription = new Subscription();

// Add a channel filter
subscription.pattern.add( 'channel', 'CNN' );

// Add a show filter
subscription.pattern.add( 'show', Subscription.Pattern.Chunk.ALL );