reuse-pool/index.js

Pool arbitrary objects for reuse

var EMPTY = {};
var NO_OP = function() {};

module.exports = reusePool;
function reusePool(factory, opts) {
    return new ReusePool(factory, opts);
}

function ReusePool(factory, opts) {
    this._factory = factory;
    this._recycled = [];
    opts = opts || EMPTY;
    this._prepare = opts.prepare || NO_OP;
    this._max = opts.max || Infinity;
}

ReusePool.prototype.get = function() {
    if (this._recycled.length) {
        var obj = this._recycled.pop();
        this._prepare(obj);
        return obj;
    } else {
        return this._factory();
    }
}

ReusePool.prototype.recycle = function(obj) {
	if (this._recycled.length < this._max) {
		this._recycled.push(obj);	
	}
}