asyncemit

asyncemit

The asyncemit allows you to emit an event to an EventEmitter3 asynchronously.

Installation

The module is released in the public npm registry and can be installed using:

npm install --save asyncemit

Usage

To make this pattern work we have make a couple assumptions about the way this module is used:

1. This method should be added on either a class that inherits from the EventEmitter or on a new EventEmitter instance.
2. The amount of arguments you pass is the same amount of arguments required for your event to be seen as async emitter.

See the following example:

var asyncemit = require('asyncemit')
  , EventEmitter = require('eventemitter3');

var ee = new EventEmitter();
ee.asyncemit = asyncemit;

//
// The next `foo` listeners will not be executed until this `next` is called. 
//
ee.on('foo', function (arg, next) {
  // do things with arg?
  next();
});

//
// Still executed, by sync
//
ee.on('foo', function (arg) {

});

ee.asyncemit('foo', 'bar', function (err) {
  //
  // The error argument will be set if one of the async listeners called the
  // `next` callback with an `error` arugment.
  //
});

License

MIT