berlysia/purgable-listener

purgeable-listener

not in npm.

sample

var PurgeableListener = require('purgeable-listener');

var EventEmitter = require('events').EventEmitter;
var ee = new EventEmitter();

for(var i = 0; i < 100; ++i){
    new Promise(function(resolve, reject){
        var purger = new PurgeableListener({autoPurge: true});
        function onData(data){resolve(data)}
        function onError(err){reject(data)}
        function onFoo(data){resolve(fooFn(data))}

        ee.on('error', purger.enpurgeable(onError, ee.removeListener.bind(ee, 'error')));
        ee.on('done', purger.enpurgeable(onData, ee.removeListener.bind(ee, 'done')));
        ee.on('foo', purger.enpurgeable(onData, ee.removeListener.bind(ee, 'foo')));
    });

    ee.emit(i%2 ? 'error' : 'done');
    // listeners are removed automatically!!
}

API

constructor(options)

member of options

• autoPurge: boolean
  • Optional.
  • When one of purgeabled listeners called, PurgeableListener#purge is called automatically.
• defaultRemover: Function
  • Optional.
  • If defaultRemover is given, you can omit PurgeableListener#enpurgeable's second argument.

enpurgeable(listener, remover?)

• listener is a base listener.
• remover is called when PurgeableListener#purge is called. 1st argument is listener object.
  • Omittable when defaultRemover is given.

purge()

Purge listeners manually.