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events: move EE c'tor guts to EventEmitter.init 

After landing 6ed861d it is no longer possible to reliably monkey-patch
the EventEmitter constructor. However there's valid use cases for that,
and makes for easier debugging. Therefore, move the guts of the
constructor to a separate function which is monkey-patchable.

Closes #6693
pull/37258/head
Bert Belder 2013-12-12 14:59:40 -08:00
parent f030d8426a
commit 54da818e4b
1 changed files with 13 additions and 10 deletions
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23
lib/events.js
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@ -23,16 +23,7 @@ var domain;
var util = require('util');
function EventEmitter() {
this.domain = null;
if (EventEmitter.usingDomains) {
// if there is an active domain, then attach to it.
domain = domain || require('domain');
if (domain.active && !(this instanceof domain.Domain)) {
this.domain = domain.active;
}
}
this._events = this._events || {};
this._maxListeners = this._maxListeners || undefined;
EventEmitter.init.call(this);
}
module.exports = EventEmitter;
@ -49,6 +40,18 @@ EventEmitter.prototype._maxListeners = undefined;
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;
EventEmitter.init = function() {
this.domain = null;
if (EventEmitter.usingDomains) {
// if there is an active domain, then attach to it.
domain = domain || require('domain');
if (domain.active && !(this instanceof domain.Domain)) {
this.domain = domain.active;
}
}
this._events = this._events || {};
this._maxListeners = this._maxListeners || undefined;
};
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.