ZF2 Redis: how to set expiration time for a key - php

Question

I have to set up a Redis on a server to store information from Zend Framework 2.
For now, I can store information, but I can not to give them an expiration time for they naturally renew themselves after a while.
I have not found some documentations about this step and it seems to me rather obscure.
My code:
page: config/autoload/cache.global.php
return array(
'caches' => array(
'redis' => array (
'adapter' => array (
'name' => 'redis',
'lifetime' => 60, //doesn't work
'options' => array (
'server' => array (
'host' => 'x.x.x.x',
'port' => x
),
'ttl' => 10, // seems to have no effect
'namespace' => 'mycache',
),
),
)
)
);
in Controller :
..
use Zend\Cache\StorageFactory;
..
$redis = StorageFactory::factory ($this->getServiceLocator ()
->get ('config')['caches']['redis']);
if ($redis->hasItem ('test')) {
var_dump($redis->getItem ('test'));
$redis->removeItem('test');
} else {
$redis->addItem('test', 'testtest');
}
..
I tried several methods, but everytime, the result is the same, no expiration information appears in Redis :
127.0.0.1:6379> get mycache:test
"testtest"
127.0.0.1:6379> ttl mycache:test
(integer) -1
Thanks for your help!

Answer 1

You can also try this:
$redis = $this->getServiceLocator()->get('Cache\RedisFactory');
$redis->getOptions()->setTtl(10);
$redis->setItem('test', 'Custom Value');
So there is no need to set it globaly in factory.
This work for me :)

Answer 2

Take a look at my redis factory bellow:
<?php
namespace Application\Service\Factory;
use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\Cache\Storage\Adapter\RedisOptions;
use Zend\Cache\Storage\Adapter\Redis;
class RedisCacheFactory implements FactoryInterface
{
public function createService(ServiceLocatorInterface $serviceLocator)
{
$config = $serviceLocator->get('Config');
$config = $config['redis'];
$options = new RedisOptions();
$options->setServer(
[
'host' => $config["host"],
'port' => $config["port"],
'timeout' => $config["timeout"]
]
);
$options->setTtl(60);
/**
* This is not required, although it will allow to store anything that can be serialized by PHP in Redis
*/
$options->setLibOptions(
[
\Redis::OPT_SERIALIZER => \Redis::SERIALIZER_PHP
]
);
$redis = new Redis($options);
return $redis;
}
}
As you can see from the example, the TTL is set to 60 seconds and its working as expected.

Answer 3

Predis\Client has a "magic call" method command executor for setEx:
$redis->setEx($key, $expireTTL, $value);
This will set key if does not exist with passed value for a custom expiration time.
This will update existing key, resetting expiration time.
Double check as you mentioned to see that everything works as expected:
127.0.0.1:6379>dump your_key
127.0.0.1:6379>ttl your_key
Hope it helps :) !

Answer 4

return array(
'caches' => array(
'redis' => array (
'adapter' => array (
'name' => 'redis',
'options' => array (
'server' => array (
'host' => 'x.x.x.x',
'port' => x
),
'Ttl' => 10, // Starting with capital letter
'namespace' => 'mycache',
),
),
)
)
);