realizehit-subscription
v0.1.9
Published
realizehit subscription class
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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 );