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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Memcache;
use OCP\IMemcache;
class ArrayCache extends Cache implements IMemcache {
/** @var array Array with the cached data */
protected $cachedData = array();
use CADTrait;
/**
* {@inheritDoc}
*/
public function get($key) {
if ($this->hasKey($key)) {
return $this->cachedData[$key];
}
return null;
}
/**
* {@inheritDoc}
*/
public function set($key, $value, $ttl = 0) {
$this->cachedData[$key] = $value;
return true;
}
/**
* {@inheritDoc}
*/
public function hasKey($key) {
return isset($this->cachedData[$key]);
}
/**
* {@inheritDoc}
*/
public function remove($key) {
unset($this->cachedData[$key]);
return true;
}
/**
* {@inheritDoc}
*/
public function clear($prefix = '') {
if ($prefix === '') {
$this->cachedData = [];
return true;
}
foreach ($this->cachedData as $key => $value) {
if (strpos($key, $prefix) === 0) {
$this->remove($key);
}
}
return true;
}
/**
* Set a value in the cache if it's not already stored
*
* @param string $key
* @param mixed $value
* @param int $ttl Time To Live in seconds. Defaults to 60*60*24
* @return bool
*/
public function add($key, $value, $ttl = 0) {
// since this cache is not shared race conditions aren't an issue
if ($this->hasKey($key)) {
return false;
} else {
return $this->set($key, $value, $ttl);
}
}
/**
* Increase a stored number
*
* @param string $key
* @param int $step
* @return int | bool
*/
public function inc($key, $step = 1) {
$oldValue = $this->get($key);
if (is_int($oldValue)) {
$this->set($key, $oldValue + $step);
return $oldValue + $step;
} else {
$success = $this->add($key, $step);
return ($success) ? $step : false;
}
}
/**
* Decrease a stored number
*
* @param string $key
* @param int $step
* @return int | bool
*/
public function dec($key, $step = 1) {
$oldValue = $this->get($key);
if (is_int($oldValue)) {
$this->set($key, $oldValue - $step);
return $oldValue - $step;
} else {
return false;
}
}
/**
* Compare and set
*
* @param string $key
* @param mixed $old
* @param mixed $new
* @return bool
*/
public function cas($key, $old, $new) {
if ($this->get($key) === $old) {
return $this->set($key, $new);
} else {
return false;
}
}
/**
* {@inheritDoc}
*/
static public function isAvailable() {
return true;
}
}
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