sys = require('sys');

/*** Helper implementation*/

function helper() {

console. log('HELPER CREATED');this. name = 'helper';

/*** Object creation*/this. onCreate = function() {console. log('DATA CREATED');

return {'scheme' : 'helper','data' : 'TEST','ttl' : new Date(). getTime() + 2000,'hits' : 0};};

/*** Object deletion*/

this. onDelete = function(obj) {console. log('DATA DELETED ' + sys. inspect(obj));

/*** Maybe implemented in async mode*///

process. nextTick(function() {// console. log('TEST 1 finished');// });};};

/*** Cache implementation*/

function cache() {this. helpers = {};

this. data = {};

console. log('CACHE CREATED');

this. addHelper = function(obj) {console. log('CACHE HELPER ADDED');this. helpers[obj. name] = obj;};

/*** return object from cache if exeist if not create it proto* get({methodName: '', params: ''})*/

this. get = function(key) {console. log('GET OBJECT: ' + key. methodName);

/*** We can use msgpack for more speed*/

var obj = this. data[JSON. stringify(key)];

if (obj == undefined) {var helper = this. helpers[key. methodName];

if (helper != null) {obj = helper. onCreate(key. params);

this. set(key, obj);}}if (obj != null)obj. hits++;return obj;};

/*** store object in cache*/

this. set = function(key, obj) {console. log('SET OBJECT: ' + key);

/*** We can use msgpack for more speed*/

this. data[JSON. stringify(key)] = obj;};

/*** cache cleaner*/this. purge = function() {ttl = new Date(). getTime();

for ( var key in this. data) {var obj = this. data[key];

if ((obj != undefined) && (obj. ttl != 0) && (obj. ttl < ttl)) {

/*** We can use msgpack for more speed*/

var helper = this. helpers[JSON. parse(key). methodName];

if (helper != null) {helper. onDelete(obj);console. log('PURGE ' + ttl);}delete this. data[key];}}};

var that = this;

/*** Need set interval*/setInterval(function() {that. purge();}, 1000 * 1 * 1);};

/*** TEST*/

var app_cache = new cache();

var app_helper = new helper();

app_cache. addHelper(app_helper);var obj = app_cache. get({'methodName' : 'helper',params : ''});

obj = app_cache. get({'methodName' : 'helper',params : ''});

sys. puts(sys. inspect(obj));setInterval(function() {var obj = app_cache. get({'methodName' : 'helper',params : ''});

sys. puts(sys. inspect(obj));}, 1000 * 15 * 1);

Вот и все. Мы получили очень быстрое хранилище объектов с полным жизненным циклом: учетом времени жизни, метаданными, автоматическим созданием и смертью объекта.