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<?php
namespace Drupal\Core\Cache;
/**
* Defines a memory cache implementation that counts set and get calls.
*
* This can be used to mock a cache backend where one needs to know how
* many times a cache entry was set or requested.
*
* @todo On the longrun this backend should be replaced by phpunit mock objects.
*/
class MemoryCounterBackend extends MemoryBackend {
/**
* Stores a list of cache cid calls keyed by function name.
*
* @var array
*/
protected $counter = [];
/**
* {@inheritdoc}
*/
public function get($cid, $allow_invalid = FALSE) {
$this->increaseCounter(__FUNCTION__, $cid);
return parent::get($cid, $allow_invalid);
}
/**
* {@inheritdoc}
*/
public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
$this->increaseCounter(__FUNCTION__, $cid);
parent::set($cid, $data, $expire, $tags);
}
/**
* {@inheritdoc}
*/
public function delete($cid) {
$this->increaseCounter(__FUNCTION__, $cid);
parent::delete($cid);
}
/**
* Increase the counter for a function with a certain cid.
*
* @param string $function
* The called function.
* @param string $cid
* The cache ID of the cache entry to increase the counter.
*/
protected function increaseCounter($function, $cid) {
if (!isset($this->counter[$function][$cid])) {
$this->counter[$function][$cid] = 1;
}
else {
$this->counter[$function][$cid]++;
}
}
/**
* Returns the call counter for the get, set and delete methods.
*
* @param string $method
* (optional) The name of the method to return the call counter for.
* @param string $cid
* (optional) The name of the cache id to return the call counter for.
*
* @return int|array
* An integer if both method and cid is given, an array otherwise.
*/
public function getCounter($method = NULL, $cid = NULL) {
if ($method && $cid) {
return isset($this->counter[$method][$cid]) ? $this->counter[$method][$cid] : 0;
}
elseif ($method) {
return isset($this->counter[$method]) ? $this->counter[$method] : [];
}
else {
return $this->counter;
}
}
/**
* Resets the call counter.
*/
public function resetCounter() {
$this->counter = [];
}
}