/**
* {@inheritDoc}
*/
public function __invoke(CachePoolInterface $cache, $stage, CacheItemInterface $item = null)
{
if (rand(1, $this->divisor) <= $this->probability) {
// log message
$cache->log('info', Message::get(Message::CACHE_GARBAGE_COLLECT, date("Y-m-d H:i:s")));
// purge those staled
$cache->getDriver()->purge($this->max_lifetime);
}
// always true
return true;
}
/**
* {@inheritDoc}
*/
public function __invoke(CachePoolInterface $cache, $stage, CacheItemInterface $item = null)
{
// 100/1000 (10%) chances to commit
if (rand(1, $this->divisor) <= $this->probability) {
// log message
$cache->log('notice', Message::get(Message::CACHE_COMMIT_DEFERRED));
// commit deferred
$cache->getDriver()->commit();
}
// always return true
return true;
}
/**
* {@inheritDoc}
*/
public function __invoke(CachePoolInterface $cache, $stage, CacheItemInterface $item = null)
{
if ($item instanceof CacheItemInterface && $item->isHit()) {
// time left
$left = $item->getExpiration()->getTimestamp() - time();
if ($left < $this->time_left && rand(1, $this->divisor) <= $this->probability) {
// log message
$cache->log('notice', Message::get(Message::CACHE_STAMPEDE_EXT, $item->getKey()));
// revert to miss
return $item->setHit(false);
}
}
return true;
}
/**
* {@inheritDoc}
*/
public function isHit()
{
if (!is_bool($this->hit)) {
// before has
if (!$this->cache->runExtensions(ES::STAGE_PRE_HAS, $this)) {
return $this->setHit(false);
}
$this->expire = $this->cache->getDriver()->has($this->key);
$this->hit = $this->expire < time() ? false : true;
// after has
if (!$this->cache->runExtensions(ES::STAGE_POST_HAS, $this)) {
return $this->setHit(false);
}
}
return $this->hit;
}
/**
* Clear by tags
*
* @param CachePoolInterface $cache
* @param string $tag tag
* @return bool
* @access public
*/
public function clearByTag(CachePoolInterface $cache, $tag)
{
// get tagItem for $tag
$tagKey = $this->getTagKey($tag);
$tagItem = $cache->getItem($tagKey);
// read array of keys from $tagItem
if ($tagItem->isHit()) {
$keyArray = $tagItem->get();
foreach (array_keys($keyArray) as $key) {
if ($cache->deleteItem($key)) {
unset($keyArray[$key]);
}
}
// get error
if (count($keyArray)) {
$this->setError($cache->getError(), $cache->getErrorCode());
}
// update tagItem
$tagItem->set($keyArray);
$tagItem->expiresAfter($this->tag_life);
// one year
$cache->save($tagItem);
if (count($keyArray)) {
return false;
}
}
return $this->trueAndFlushError();
}
