famous-mediator

A design pattern that decouples modules using the mediator pattern.

Getting started

Install using bower or npm

  bower install famous-mediator
  npm install famous-mediator

Example

Imagine you have a Router module and a pages module:

1. Router.js - does it's thing and doesn't know about other modules

  function Router(){
    // blablabla
    this.name = 'router';
    Engine.emit('created',this) // broadcast created event
    // blablabla
  }

2. PageController.js - displays pages but doesn't know about any routes!

  function PageController(){
    // blablabla
    this.name = 'pages';   // name your module
    Engine.emit('created',this) // broadcast created event
    // blablabla
  }

3. RouteMediator.js - couples the router and pages together!

  var Mediator = require('famous-mediator');;

  Mediator.on('created:Router',function(router){
    router.on('change',function(name){
      Mediator.pages.setPage(name);
    });
  });

Benefits

Using the mediator pattern to decouple modules

• Promotes clean, reusable modules
• Clear seperation of concerns - no more sneaky business logic in your templates!
• Is the perfect place for hacks, experiments, monkey-patches and workarounds. And because all of your "bad" code is in the Mediators, your actual code base stays clean! (True story!)

Usage

The Famo.us Engine is used as a global eventbus to announce creation of modules. If you want to register a module, simple call in your constructor function:

  Engine.emit('created',this)

A module MUST have a name to be registered. This name can be found on:

• this.options.id = 'xxxx'
• this.options.name = 'xxxx'
• this.id = 'xxxx'
• this.name = 'xxxx'

The module with the name xxxx is accessible as follows:

  var Mediator = require('famous-mediator');
  Mediator.xxxx
  Mediator.on('created:xxxx',function(xxxx){ .... });

The idea is to write Mediator singletons that couple modules together by:

• listening to the events they emit
• calling the public API
• triggering events on a module

Changelog

0.1.1 (31/10/2014)

• Aliased Mediator.on to Engine.on.

Contribute

Feel free to contribute to this project in any way. The easiest way to support this project is by giving it a star.

Contact

• @markmarijnissen
• http://www.madebymark.nl
• [email protected]

© 2014 - Mark Marijnissen