--- /dev/null
+
+/*!
+ * Connect - session - MemoryStore
+ * Copyright(c) 2010 Sencha Inc.
+ * Copyright(c) 2011 TJ Holowaychuk
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Store = require('./store')
+ , utils = require('../../utils')
+ , Session = require('./session');
+
+/**
+ * Initialize a new `MemoryStore`.
+ *
+ * @api public
+ */
+
+var MemoryStore = module.exports = function MemoryStore() {
+ this.sessions = {};
+};
+
+/**
+ * Inherit from `Store.prototype`.
+ */
+
+MemoryStore.prototype.__proto__ = Store.prototype;
+
+/**
+ * Attempt to fetch session by the given `sid`.
+ *
+ * @param {String} sid
+ * @param {Function} fn
+ * @api public
+ */
+
+MemoryStore.prototype.get = function(sid, fn){
+ var self = this;
+ process.nextTick(function(){
+ var expires
+ , sess = self.sessions[sid];
+ if (sess) {
+ sess = JSON.parse(sess);
+ expires = 'string' == typeof sess.cookie.expires
+ ? new Date(sess.cookie.expires)
+ : sess.cookie.expires;
+ if (!expires || new Date < expires) {
+ fn(null, sess);
+ } else {
+ self.destroy(sid, fn);
+ }
+ } else {
+ fn();
+ }
+ });
+};
+
+/**
+ * Commit the given `sess` object associated with the given `sid`.
+ *
+ * @param {String} sid
+ * @param {Session} sess
+ * @param {Function} fn
+ * @api public
+ */
+
+MemoryStore.prototype.set = function(sid, sess, fn){
+ var self = this;
+ process.nextTick(function(){
+ self.sessions[sid] = JSON.stringify(sess);
+ fn && fn();
+ });
+};
+
+/**
+ * Destroy the session associated with the given `sid`.
+ *
+ * @param {String} sid
+ * @api public
+ */
+
+MemoryStore.prototype.destroy = function(sid, fn){
+ var self = this;
+ process.nextTick(function(){
+ delete self.sessions[sid];
+ fn && fn();
+ });
+};
+
+/**
+ * Invoke the given callback `fn` with all active sessions.
+ *
+ * @param {Function} fn
+ * @api public
+ */
+
+MemoryStore.prototype.all = function(fn){
+ var arr = []
+ , keys = Object.keys(this.sessions);
+ for (var i = 0, len = keys.length; i < len; ++i) {
+ arr.push(this.sessions[keys[i]]);
+ }
+ fn(null, arr);
+};
+
+/**
+ * Clear all sessions.
+ *
+ * @param {Function} fn
+ * @api public
+ */
+
+MemoryStore.prototype.clear = function(fn){
+ this.sessions = {};
+ fn && fn();
+};
+
+/**
+ * Fetch number of sessions.
+ *
+ * @param {Function} fn
+ * @api public
+ */
+
+MemoryStore.prototype.length = function(fn){
+ fn(null, Object.keys(this.sessions).length);
+};