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Removed EventEmitter2. Using core events

This commit is contained in:
Hugo Sarti 2014-11-14 23:38:39 -03:00
parent 619b8cf810
commit ce66c0ffc6
6 changed files with 3 additions and 908 deletions

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[![build-status](https://www.codeship.io/projects/3ad58940-4c7d-0131-15d5-5a8cd3f550f8/status)](https://www.codeship.io/projects/11259)
# SYNOPSIS
EventEmitter2 is an implementation of the EventEmitter found in Node.js
# DESCRIPTION
### FEATURES
- Namespaces/Wildcards.
- Times To Listen (TTL), extends the `once` concept with `many`.
- Browser environment compatibility.
- Demonstrates good performance in benchmarks
```
EventEmitterHeatUp x 3,728,965 ops/sec \302\2610.68% (60 runs sampled)
EventEmitter x 2,822,904 ops/sec \302\2610.74% (63 runs sampled)
EventEmitter2 x 7,251,227 ops/sec \302\2610.55% (58 runs sampled)
EventEmitter2 (wild) x 3,220,268 ops/sec \302\2610.44% (65 runs sampled)
Fastest is EventEmitter2
```
### Differences (Non breaking, compatible with existing EventEmitter)
- The constructor takes a configuration object.
```javascript
var EventEmitter2 = require('eventemitter2').EventEmitter2;
var server = new EventEmitter2({
//
// use wildcards.
//
wildcard: true,
//
// the delimiter used to segment namespaces, defaults to `.`.
//
delimiter: '::',
//
// if you want to emit the newListener event set to true.
//
newListener: false,
//
// max listeners that can be assigned to an event, default 10.
//
maxListeners: 20
});
```
- Getting the actual event that fired.
```javascript
server.on('foo.*', function(value1, value2) {
console.log(this.event, value1, value2);
});
```
- Fire an event N times and then remove it, an extension of the `once` concept.
```javascript
server.many('foo', 4, function() {
console.log('hello');
});
```
- Pass in a namespaced event as an array rather than a delimited string.
```javascript
server.many(['foo', 'bar', 'bazz'], function() {
console.log('hello');
});
```
# API
When an `EventEmitter` instance experiences an error, the typical action is
to emit an `error` event. Error events are treated as a special case.
If there is no listener for it, then the default action is to print a stack
trace and exit the program.
All EventEmitters emit the event `newListener` when new listeners are
added.
**Namespaces** with **Wildcards**
To use namespaces/wildcards, pass the `wildcard` option into the EventEmitter
constructor. When namespaces/wildcards are enabled, events can either be
strings (`foo.bar`) separated by a delimiter or arrays (`['foo', 'bar']`). The
delimiter is also configurable as a constructor option.
An event name passed to any event emitter method can contain a wild card (the
`*` character). If the event name is a string, a wildcard may appear as `foo.*`.
If the event name is an array, the wildcard may appear as `['foo', '*']`.
If either of the above described events were passed to the `on` method,
subsequent emits such as the following would be observed...
```javascript
emitter.emit('foo.bazz');
emitter.emit(['foo', 'bar']);
```
### emitter.addListener(event, listener)
### emitter.on(event, listener)
Adds a listener to the end of the listeners array for the specified event.
```javascript
server.on('data', function(value1, value2, value3, ...) {
console.log('The event was raised!');
});
```
```javascript
server.on('data', function(value) {
console.log('The event was raised!');
});
```
### emitter.onAny(listener)
Adds a listener that will be fired when any event is emitted.
```javascript
server.onAny(function(value) {
console.log('All events trigger this.');
});
```
### emitter.offAny(listener)
Removes the listener that will be fired when any event is emitted.
```javascript
server.offAny(function(value) {
console.log('The event was raised!');
});
```
#### emitter.once(event, listener)
Adds a **one time** listener for the event. The listener is invoked
only the first time the event is fired, after which it is removed.
```javascript
server.once('get', function (value) {
console.log('Ah, we have our first value!');
});
```
### emitter.many(event, timesToListen, listener)
Adds a listener that will execute **n times** for the event before being
removed. The listener is invoked only the first **n times** the event is
fired, after which it is removed.
```javascript
server.many('get', 4, function (value) {
console.log('This event will be listened to exactly four times.');
});
```
### emitter.removeListener(event, listener)
### emitter.off(event, listener)
Remove a listener from the listener array for the specified event.
**Caution**: changes array indices in the listener array behind the listener.
```javascript
var callback = function(value) {
console.log('someone connected!');
};
server.on('get', callback);
// ...
server.removeListener('get', callback);
```
### emitter.removeAllListeners([event])
Removes all listeners, or those of the specified event.
### emitter.setMaxListeners(n)
By default EventEmitters will print a warning if more than 10 listeners
are added to it. This is a useful default which helps finding memory leaks.
Obviously not all Emitters should be limited to 10. This function allows
that to be increased. Set to zero for unlimited.
### emitter.listeners(event)
Returns an array of listeners for the specified event. This array can be
manipulated, e.g. to remove listeners.
```javascript
server.on('get', function(value) {
console.log('someone connected!');
});
console.log(server.listeners('get')); // [ [Function] ]
```
### emitter.listenersAny()
Returns an array of listeners that are listening for any event that is
specified. This array can be manipulated, e.g. to remove listeners.
```javascript
server.onAny(function(value) {
console.log('someone connected!');
});
console.log(server.listenersAny()[0]); // [ [Function] ]
```
### emitter.emit(event, [arg1], [arg2], [...])
Execute each of the listeners that may be listening for the specified event
name in order with the list of arguments.
# LICENSE
(The MIT License)
Copyright (c) 2011 hij1nx <http://www.twitter.com/hij1nx>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the 'Software'), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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module.exports = require('./lib/eventemitter2');

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/*!
* EventEmitter2
* https://github.com/hij1nx/EventEmitter2
*
* Copyright (c) 2013 hij1nx
* Licensed under the MIT license.
*/
;!function(undefined) {
var isArray = Array.isArray ? Array.isArray : function _isArray(obj) {
return Object.prototype.toString.call(obj) === "[object Array]";
};
var defaultMaxListeners = 10;
function init() {
this._events = {};
if (this._conf) {
configure.call(this, this._conf);
}
}
function configure(conf) {
if (conf) {
this._conf = conf;
conf.delimiter && (this.delimiter = conf.delimiter);
conf.maxListeners && (this._events.maxListeners = conf.maxListeners);
conf.wildcard && (this.wildcard = conf.wildcard);
conf.newListener && (this.newListener = conf.newListener);
if (this.wildcard) {
this.listenerTree = {};
}
}
}
function EventEmitter(conf) {
this._events = {};
this.newListener = false;
configure.call(this, conf);
}
//
// Attention, function return type now is array, always !
// It has zero elements if no any matches found and one or more
// elements (leafs) if there are matches
//
function searchListenerTree(handlers, type, tree, i) {
if (!tree) {
return [];
}
var listeners=[], leaf, len, branch, xTree, xxTree, isolatedBranch, endReached,
typeLength = type.length, currentType = type[i], nextType = type[i+1];
if (i === typeLength && tree._listeners) {
//
// If at the end of the event(s) list and the tree has listeners
// invoke those listeners.
//
if (typeof tree._listeners === 'function') {
handlers && handlers.push(tree._listeners);
return [tree];
} else {
for (leaf = 0, len = tree._listeners.length; leaf < len; leaf++) {
handlers && handlers.push(tree._listeners[leaf]);
}
return [tree];
}
}
if ((currentType === '*' || currentType === '**') || tree[currentType]) {
//
// If the event emitted is '*' at this part
// or there is a concrete match at this patch
//
if (currentType === '*') {
for (branch in tree) {
if (branch !== '_listeners' && tree.hasOwnProperty(branch)) {
listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+1));
}
}
return listeners;
} else if(currentType === '**') {
endReached = (i+1 === typeLength || (i+2 === typeLength && nextType === '*'));
if(endReached && tree._listeners) {
// The next element has a _listeners, add it to the handlers.
listeners = listeners.concat(searchListenerTree(handlers, type, tree, typeLength));
}
for (branch in tree) {
if (branch !== '_listeners' && tree.hasOwnProperty(branch)) {
if(branch === '*' || branch === '**') {
if(tree[branch]._listeners && !endReached) {
listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], typeLength));
}
listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i));
} else if(branch === nextType) {
listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i+2));
} else {
// No match on this one, shift into the tree but not in the type array.
listeners = listeners.concat(searchListenerTree(handlers, type, tree[branch], i));
}
}
}
return listeners;
}
listeners = listeners.concat(searchListenerTree(handlers, type, tree[currentType], i+1));
}
xTree = tree['*'];
if (xTree) {
//
// If the listener tree will allow any match for this part,
// then recursively explore all branches of the tree
//
searchListenerTree(handlers, type, xTree, i+1);
}
xxTree = tree['**'];
if(xxTree) {
if(i < typeLength) {
if(xxTree._listeners) {
// If we have a listener on a '**', it will catch all, so add its handler.
searchListenerTree(handlers, type, xxTree, typeLength);
}
// Build arrays of matching next branches and others.
for(branch in xxTree) {
if(branch !== '_listeners' && xxTree.hasOwnProperty(branch)) {
if(branch === nextType) {
// We know the next element will match, so jump twice.
searchListenerTree(handlers, type, xxTree[branch], i+2);
} else if(branch === currentType) {
// Current node matches, move into the tree.
searchListenerTree(handlers, type, xxTree[branch], i+1);
} else {
isolatedBranch = {};
isolatedBranch[branch] = xxTree[branch];
searchListenerTree(handlers, type, { '**': isolatedBranch }, i+1);
}
}
}
} else if(xxTree._listeners) {
// We have reached the end and still on a '**'
searchListenerTree(handlers, type, xxTree, typeLength);
} else if(xxTree['*'] && xxTree['*']._listeners) {
searchListenerTree(handlers, type, xxTree['*'], typeLength);
}
}
return listeners;
}
function growListenerTree(type, listener) {
type = typeof type === 'string' ? type.split(this.delimiter) : type.slice();
//
// Looks for two consecutive '**', if so, don't add the event at all.
//
for(var i = 0, len = type.length; i+1 < len; i++) {
if(type[i] === '**' && type[i+1] === '**') {
return;
}
}
var tree = this.listenerTree;
var name = type.shift();
while (name) {
if (!tree[name]) {
tree[name] = {};
}
tree = tree[name];
if (type.length === 0) {
if (!tree._listeners) {
tree._listeners = listener;
}
else if(typeof tree._listeners === 'function') {
tree._listeners = [tree._listeners, listener];
}
else if (isArray(tree._listeners)) {
tree._listeners.push(listener);
if (!tree._listeners.warned) {
var m = defaultMaxListeners;
if (typeof this._events.maxListeners !== 'undefined') {
m = this._events.maxListeners;
}
if (m > 0 && tree._listeners.length > m) {
tree._listeners.warned = true;
console.error('(node) warning: possible EventEmitter memory ' +
'leak detected. %d listeners added. ' +
'Use emitter.setMaxListeners() to increase limit.',
tree._listeners.length);
console.trace();
}
}
}
return true;
}
name = type.shift();
}
return true;
}
// By default EventEmitters will print a warning if more than
// 10 listeners are added to it. This is a useful default which
// helps finding memory leaks.
//
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.delimiter = '.';
EventEmitter.prototype.setMaxListeners = function(n) {
this._events || init.call(this);
this._events.maxListeners = n;
if (!this._conf) this._conf = {};
this._conf.maxListeners = n;
};
EventEmitter.prototype.event = '';
EventEmitter.prototype.once = function(event, fn) {
this.many(event, 1, fn);
return this;
};
EventEmitter.prototype.many = function(event, ttl, fn) {
var self = this;
if (typeof fn !== 'function') {
throw new Error('many only accepts instances of Function');
}
function listener() {
if (--ttl === 0) {
self.off(event, listener);
}
fn.apply(this, arguments);
}
listener._origin = fn;
this.on(event, listener);
return self;
};
EventEmitter.prototype.emit = function() {
this._events || init.call(this);
var type = arguments[0];
if (type === 'newListener' && !this.newListener) {
if (!this._events.newListener) { return false; }
}
// Loop through the *_all* functions and invoke them.
if (this._all) {
var l = arguments.length;
var args = new Array(l - 1);
for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
for (i = 0, l = this._all.length; i < l; i++) {
this.event = type;
this._all[i].apply(this, args);
}
}
// If there is no 'error' event listener then throw.
if (type === 'error') {
if (!this._all &&
!this._events.error &&
!(this.wildcard && this.listenerTree.error)) {
if (arguments[1] instanceof Error) {
throw arguments[1]; // Unhandled 'error' event
} else {
throw new Error("Uncaught, unspecified 'error' event.");
}
return false;
}
}
var handler;
if(this.wildcard) {
handler = [];
var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice();
searchListenerTree.call(this, handler, ns, this.listenerTree, 0);
}
else {
handler = this._events[type];
}
if (typeof handler === 'function') {
this.event = type;
if (arguments.length === 1) {
handler.call(this);
}
else if (arguments.length > 1)
switch (arguments.length) {
case 2:
handler.call(this, arguments[1]);
break;
case 3:
handler.call(this, arguments[1], arguments[2]);
break;
// slower
default:
var l = arguments.length;
var args = new Array(l - 1);
for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
handler.apply(this, args);
}
return true;
}
else if (handler) {
var l = arguments.length;
var args = new Array(l - 1);
for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
var listeners = handler.slice();
for (var i = 0, l = listeners.length; i < l; i++) {
this.event = type;
listeners[i].apply(this, args);
}
return (listeners.length > 0) || !!this._all;
}
else {
return !!this._all;
}
};
EventEmitter.prototype.on = function(type, listener) {
if (typeof type === 'function') {
this.onAny(type);
return this;
}
if (typeof listener !== 'function') {
throw new Error('on only accepts instances of Function');
}
this._events || init.call(this);
// To avoid recursion in the case that type == "newListeners"! Before
// adding it to the listeners, first emit "newListeners".
this.emit('newListener', type, listener);
if(this.wildcard) {
growListenerTree.call(this, type, listener);
return this;
}
if (!this._events[type]) {
// Optimize the case of one listener. Don't need the extra array object.
this._events[type] = listener;
}
else if(typeof this._events[type] === 'function') {
// Adding the second element, need to change to array.
this._events[type] = [this._events[type], listener];
}
else if (isArray(this._events[type])) {
// If we've already got an array, just append.
this._events[type].push(listener);
// Check for listener leak
if (!this._events[type].warned) {
var m = defaultMaxListeners;
if (typeof this._events.maxListeners !== 'undefined') {
m = this._events.maxListeners;
}
if (m > 0 && this._events[type].length > m) {
this._events[type].warned = true;
console.error('(node) warning: possible EventEmitter memory ' +
'leak detected. %d listeners added. ' +
'Use emitter.setMaxListeners() to increase limit.',
this._events[type].length);
console.trace();
}
}
}
return this;
};
EventEmitter.prototype.onAny = function(fn) {
if (typeof fn !== 'function') {
throw new Error('onAny only accepts instances of Function');
}
if(!this._all) {
this._all = [];
}
// Add the function to the event listener collection.
this._all.push(fn);
return this;
};
EventEmitter.prototype.addListener = EventEmitter.prototype.on;
EventEmitter.prototype.off = function(type, listener) {
if (typeof listener !== 'function') {
throw new Error('removeListener only takes instances of Function');
}
var handlers,leafs=[];
if(this.wildcard) {
var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice();
leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0);
}
else {
// does not use listeners(), so no side effect of creating _events[type]
if (!this._events[type]) return this;
handlers = this._events[type];
leafs.push({_listeners:handlers});
}
for (var iLeaf=0; iLeaf<leafs.length; iLeaf++) {
var leaf = leafs[iLeaf];
handlers = leaf._listeners;
if (isArray(handlers)) {
var position = -1;
for (var i = 0, length = handlers.length; i < length; i++) {
if (handlers[i] === listener ||
(handlers[i].listener && handlers[i].listener === listener) ||
(handlers[i]._origin && handlers[i]._origin === listener)) {
position = i;
break;
}
}
if (position < 0) {
continue;
}
if(this.wildcard) {
leaf._listeners.splice(position, 1);
}
else {
this._events[type].splice(position, 1);
}
if (handlers.length === 0) {
if(this.wildcard) {
delete leaf._listeners;
}
else {
delete this._events[type];
}
}
return this;
}
else if (handlers === listener ||
(handlers.listener && handlers.listener === listener) ||
(handlers._origin && handlers._origin === listener)) {
if(this.wildcard) {
delete leaf._listeners;
}
else {
delete this._events[type];
}
}
}
return this;
};
EventEmitter.prototype.offAny = function(fn) {
var i = 0, l = 0, fns;
if (fn && this._all && this._all.length > 0) {
fns = this._all;
for(i = 0, l = fns.length; i < l; i++) {
if(fn === fns[i]) {
fns.splice(i, 1);
return this;
}
}
} else {
this._all = [];
}
return this;
};
EventEmitter.prototype.removeListener = EventEmitter.prototype.off;
EventEmitter.prototype.removeAllListeners = function(type) {
if (arguments.length === 0) {
!this._events || init.call(this);
return this;
}
if(this.wildcard) {
var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice();
var leafs = searchListenerTree.call(this, null, ns, this.listenerTree, 0);
for (var iLeaf=0; iLeaf<leafs.length; iLeaf++) {
var leaf = leafs[iLeaf];
leaf._listeners = null;
}
}
else {
if (!this._events[type]) return this;
this._events[type] = null;
}
return this;
};
EventEmitter.prototype.listeners = function(type) {
if(this.wildcard) {
var handlers = [];
var ns = typeof type === 'string' ? type.split(this.delimiter) : type.slice();
searchListenerTree.call(this, handlers, ns, this.listenerTree, 0);
return handlers;
}
this._events || init.call(this);
if (!this._events[type]) this._events[type] = [];
if (!isArray(this._events[type])) {
this._events[type] = [this._events[type]];
}
return this._events[type];
};
EventEmitter.prototype.listenersAny = function() {
if(this._all) {
return this._all;
}
else {
return [];
}
};
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(function() {
return EventEmitter;
});
} else if (typeof exports === 'object') {
// CommonJS
exports.EventEmitter2 = EventEmitter;
}
else {
// Browser global.
window.EventEmitter2 = EventEmitter;
}
}();

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@ -1,82 +0,0 @@
{
"name": "eventemitter2",
"version": "0.4.14",
"description": "A Node.js event emitter implementation with namespaces, wildcards, TTL and browser support.",
"keywords": [
"event",
"events",
"emitter",
"eventemitter"
],
"author": {
"name": "hij1nx",
"email": "paolo@async.ly"
},
"contributors": [
{
"name": "Eric Elliott"
},
{
"name": "Charlie Robbins",
"email": "charlie@nodejitsu.com"
},
{
"name": "Jameson Lee",
"email": "jameson@nodejitsu.com"
},
{
"name": "Jeroen van Duffelen",
"email": "jvduf@nodejitsu.com"
},
{
"name": "Fedor Indutny",
"email": "fedor.indutny@gmail.com"
}
],
"license": "MIT",
"repository": {
"type": "git",
"url": "git://github.com/hij1nx/EventEmitter2.git"
},
"devDependencies": {
"nodeunit": "*",
"benchmark": ">= 0.2.2"
},
"main": "./lib/eventemitter2.js",
"scripts": {
"test": "nodeunit test/simple/ && nodeunit test/wildcardEvents/",
"benchmark": "node test/perf/benchmark.js"
},
"files": [
"lib/eventemitter2.js",
"index.js"
],
"bugs": {
"url": "https://github.com/hij1nx/EventEmitter2/issues"
},
"homepage": "https://github.com/hij1nx/EventEmitter2",
"_id": "eventemitter2@0.4.14",
"_shasum": "8f61b75cde012b2e9eb284d4545583b5643b61ab",
"_from": "eventemitter2@",
"_npmVersion": "1.4.7",
"_npmUser": {
"name": "jasonkuhrt",
"email": "jasonkuhrt@me.com"
},
"maintainers": [
{
"name": "hij1nx",
"email": "hij1nx@me.com"
},
{
"name": "jasonkuhrt",
"email": "jasonkuhrt@me.com"
}
],
"dist": {
"shasum": "8f61b75cde012b2e9eb284d4545583b5643b61ab",
"tarball": "http://registry.npmjs.org/eventemitter2/-/eventemitter2-0.4.14.tgz"
},
"directories": {},
"_resolved": "https://registry.npmjs.org/eventemitter2/-/eventemitter2-0.4.14.tgz"
}

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@ -6,7 +6,6 @@
"coffee-script": "1.7.1", "coffee-script": "1.7.1",
"decimal": "0.0.2", "decimal": "0.0.2",
"docco": "0.6.3", "docco": "0.6.3",
"eventemitter2": "^0.4.14",
"htmlparser2": "3.7.2", "htmlparser2": "3.7.2",
"iced-coffee-script": "1.7.1-f", "iced-coffee-script": "1.7.1-f",
"joi": "4.6.1", "joi": "4.6.1",

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@ -32,7 +32,7 @@ var Model,
joi = require("joi"), joi = require("joi"),
is = require("org/arangodb/is"), is = require("org/arangodb/is"),
extend = require('org/arangodb/extend').extend, extend = require('org/arangodb/extend').extend,
EventEmitter2 = require('eventemitter2').EventEmitter2, EventEmitter = require('events').EventEmitter,
util = require('util'), util = require('util'),
excludeExtraAttributes, excludeExtraAttributes,
metadataSchema = { metadataSchema = {
@ -144,10 +144,10 @@ Model = function (attributes) {
} else if (attributes) { } else if (attributes) {
instance.attributes = _.clone(attributes); instance.attributes = _.clone(attributes);
} }
EventEmitter2.call(instance); EventEmitter.call(instance);
}; };
util.inherits(Model, EventEmitter2); util.inherits(Model, EventEmitter);
Model.fromClient = function (attributes) { Model.fromClient = function (attributes) {
'use strict'; 'use strict';