Access memcached object in model (Phalcon) - phalcon

Question

Following this document, I'm trying to retrieve memcached key within find() method in a model (in order to get cache version of the model&relations).
Does somebody know how should i access the memcached object which i set at the DI?
class Tags extends Phalcon\Mvc\Model {
protected function _getCache($key)
{
// how do i retreive memcached object?
}
protected static function _setCache($key)
{
// stores data in the cache
}
these are the settings as they are in DI:
$di->set('modelsCache', function()
{
//Cache data for one day by default
$frontCache = new \Phalcon\Cache\Frontend\Data(array(
"lifetime" => 86400
));
//Memcached connection settings
$cache = new \Phalcon\Cache\Backend\Memcache($frontCache, array(
"host" => "localhost",
"port" => "11211"
));
return $cache;
});

Answer 1

First, if it's a reusable "service", use getShared() / setShared() on the DI, otherwise you will end up creating a new instance every time you access it.
To actually retrieve it from anywhere in your app:
class Tags extends Phalcon\Mvc\Model {
protected function _getCache($key)
{
// how do i retreive memcached object?
$modelsChache = $this->di->getShared('modelsCache');
// Or if DI is not set on the model, though in 99.9% it will be unless you are doing something unusual.
$modelsChache = DI::getDefault()->getShared('modelsCache');
}
protected static function _setCache($key)
{
// stores data in the cache
// Same as above…
}