/**
* Returns the time ( in seconds ) that remains for a cache object,
* before it gets outdated. In case the cache object is already
* outdated or does not exist, this method returns 0.
*
* @param string $id The item ID.
* @param array(string=>string) $attributes Attributes that describe the
* @access public
*
* @return int The remaining lifetime ( 0 if nonexists or outdated ).
*/
public function getRemainingLifetime($id, $attributes = array())
{
if (!isset($this->clusterCacheFile)) {
$this->clusterCacheFile = eZClusterFileHandler::instance($this->properties['location'] . $this->generateIdentifier($id, $attributes));
}
$ttl = $this->options->ttl;
$curTime = time();
if ($ttl !== false && $this->clusterCacheFile->exists() && !$this->clusterCacheFile->isExpired(-1, $curTime, $ttl)) {
$lifetime = $curTime - $this->clusterCacheFile->mtime();
if ($lifetime < $ttl) {
return $ttl - $lifetime;
}
}
return 0;
}
