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    0.3.0 • Public • Published

    node.js memcached client

    A pure-JavaScript memcached library for node.


    To run the test suite, first insall expresso, then run make test.

    If you have node-jscoverage you can also make test-cov for coverage, but that's pretty nerdy.


    Create a Client object to start working. Host and port can be passed to the constructor or set afterwards. They have sensible defaults.

    var memcache = require('./memcache');
    var client = new memcache.Client(port, host);
    client.port = 11211; = 'localhost';

    The Client object emits 4 important events - connect, close, timeout and error.

    client.on('connect', function(){
    	// no arguments - we've connected
    client.on('close', function(){
    	// no arguments - connection has been closed
    client.on('timeout', function(){
    	// no arguments - socket timed out
    client.on('error', function(e){
    	// there was an error - exception is 1st argument
    // connect to the memcache server after subscribing to some or all of these events

    After connecting, you can start to make requests.

    client.get('key', function(error, result){
    	// all of the callbacks have two arguments.
    	// 'result' may contain things which aren't great, but
    	// aren't really errors, like 'NOT_STORED'
    client.set('key', 'value', function(error, result){
    	// lifetime is optional. the default is
    	// to never expire (0)
    }, lifetime);
    client.delete('key', function(error, result){
    	// delete a key from cache.
    client.version(function(error, result)){
    	// grab the server version

    There are all the commands you would expect.

    // all of the different "store" operations
    // (lifetime & flags are both optional)
    client.set(key, value, callback, lifetime, flags);
    client.add(key, value, callback, lifetime, flags);
    client.replace(key, value, callback, lifetime, flags);
    client.append(key, value, callback, lifetime, flags);
    client.prepend(key, value, callback, lifetime, flags);
    client.cas(key, value, unique, callback, lifetime, flags);
    // increment and decrement (named differently to the server commands - for now!)
    // (value is optional, defaults to 1)
    client.increment('key', value, callback);
    client.decrement('key', value, callback);
    // statistics. the success argument to the callback
    // is a key=>value object
    client.stats('settings', callback);
    client.stats('items', callback);
    client.stats('mongeese', callback);

    Once you're done, close the connection.


    There might be bugs. I'd like to know about them.

    I bet you also want to read the memcached protocol doc. It's exciting! It also explains possible error messages.




    npm i memcache

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    • elbart