Symfony2 Memcached settings for persistent connections

AcmeMemcached.php

<?php

namespace Acme\CoreBundle\Classes\Cache;


class AcmeMemcached extends \Memcached {


    function __construct($persistent_id)
    {
        parent::__construct($persistent_id);
    }

    /**
     * prevent adding of new servers. We're persistent!
     */
    public function addServers(array $servers)
    {
        if (0 == count($this->getServerList())) {
            parent::addServers($servers);
        }
    }


}

config(prod).yml

services:
  memcache.servers:
    class: Acme\CoreBundle\Classes\Cache\AcmeMemcached
    arguments: [ "acme_mc" ] #persistent id
    calls:
      - [ addServers, [  [ ["10.0.0.1",11211, 50 ], ["10.0.0.2",11211,25], ["10.0.0.3",11211,25] ]   ] ]

I know this is old, but for anyone stumbling across this. Just be aware there is also a singular addServer method you may want to override too. Otherwise it's still possible to end up with multiple open connections.

I've added the method for addServer as well - see my Gist based on this one. https://gist.github.com/benr77/258e42642b4632d5a826#file-memcachedwrapper-php