158 lines
3.2 KiB
PHP
158 lines
3.2 KiB
PHP
<?php
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/**
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Memcache;
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use OCP\IMemcache;
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class ArrayCache extends Cache implements IMemcache {
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/** @var array Array with the cached data */
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protected $cachedData = array();
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use CADTrait;
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/**
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* {@inheritDoc}
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*/
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public function get($key) {
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if ($this->hasKey($key)) {
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return $this->cachedData[$key];
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}
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return null;
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}
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/**
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* {@inheritDoc}
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*/
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public function set($key, $value, $ttl = 0) {
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$this->cachedData[$key] = $value;
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public function hasKey($key) {
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return isset($this->cachedData[$key]);
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}
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/**
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* {@inheritDoc}
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*/
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public function remove($key) {
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unset($this->cachedData[$key]);
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public function clear($prefix = '') {
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if ($prefix === '') {
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$this->cachedData = [];
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return true;
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}
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foreach ($this->cachedData as $key => $value) {
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if (strpos($key, $prefix) === 0) {
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$this->remove($key);
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}
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}
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return true;
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}
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/**
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* Set a value in the cache if it's not already stored
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*
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* @param string $key
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* @param mixed $value
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* @param int $ttl Time To Live in seconds. Defaults to 60*60*24
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* @return bool
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*/
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public function add($key, $value, $ttl = 0) {
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// since this cache is not shared race conditions aren't an issue
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if ($this->hasKey($key)) {
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return false;
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} else {
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return $this->set($key, $value, $ttl);
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}
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}
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/**
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* Increase a stored number
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*
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* @param string $key
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* @param int $step
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* @return int | bool
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*/
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public function inc($key, $step = 1) {
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$oldValue = $this->get($key);
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if (is_int($oldValue)) {
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$this->set($key, $oldValue + $step);
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return $oldValue + $step;
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} else {
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$success = $this->add($key, $step);
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return ($success) ? $step : false;
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}
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}
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/**
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* Decrease a stored number
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*
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* @param string $key
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* @param int $step
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* @return int | bool
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*/
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public function dec($key, $step = 1) {
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$oldValue = $this->get($key);
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if (is_int($oldValue)) {
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$this->set($key, $oldValue - $step);
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return $oldValue - $step;
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} else {
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return false;
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}
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}
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/**
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* Compare and set
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*
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* @param string $key
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* @param mixed $old
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* @param mixed $new
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* @return bool
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*/
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public function cas($key, $old, $new) {
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if ($this->get($key) === $old) {
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return $this->set($key, $new);
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} else {
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return false;
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}
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}
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/**
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* {@inheritDoc}
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*/
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static public function isAvailable() {
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return true;
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}
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}
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