mirror of
https://github.com/friendica/friendica
synced 2024-06-17 07:37:55 +02:00
170 lines
4.1 KiB
PHP
170 lines
4.1 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Core\Cache\Type;
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use Friendica\Core\Cache\Enum\Duration;
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use Friendica\Core\Cache\Capability\ICanCacheInMemory;
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use Friendica\Core\Cache\Enum\Type;
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use Friendica\Core\Cache\Exception\CachePersistenceException;
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use Friendica\Core\Cache\Exception\InvalidCacheDriverException;
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use Friendica\Core\Config\Capability\IManageConfigValues;
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use Memcache;
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/**
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* Memcache Cache
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*/
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class MemcacheCache extends AbstractCache implements ICanCacheInMemory
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{
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use CompareSetTrait;
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use CompareDeleteTrait;
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use MemcacheCommandTrait;
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/**
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* @var Memcache
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*/
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private $memcache;
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/**
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* @param string $hostname
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* @param IManageConfigValues $config
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*
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* @throws InvalidCacheDriverException
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* @throws CachePersistenceException
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*/
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public function __construct(string $hostname, IManageConfigValues $config)
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{
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if (!class_exists('Memcache', false)) {
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throw new InvalidCacheDriverException('Memcache class isn\'t available');
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}
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parent::__construct($hostname);
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$this->memcache = new Memcache();
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$this->server = $config->get('system', 'memcache_host');
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$this->port = $config->get('system', 'memcache_port');
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if (!@$this->memcache->connect($this->server, $this->port)) {
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throw new CachePersistenceException('Expected Memcache server at ' . $this->server . ':' . $this->port . ' isn\'t available');
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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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public function getAllKeys(?string $prefix = null): array
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{
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$keys = $this->getOriginalKeys($this->getMemcacheKeys());
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return $this->filterArrayKeysByPrefix($keys, $prefix);
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}
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/**
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* (@inheritdoc)
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*/
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public function get(string $key)
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{
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$cacheKey = $this->getCacheKey($key);
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// We fetch with the hostname as key to avoid problems with other applications
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$cached = $this->memcache->get($cacheKey);
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// @see http://php.net/manual/en/memcache.get.php#84275
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if (is_bool($cached) || is_double($cached) || is_long($cached)) {
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return null;
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}
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$value = @unserialize($cached);
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// Only return a value if the serialized value is valid.
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// We also check if the db entry is a serialized
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// boolean 'false' value (which we want to return).
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if ($cached === serialize(false) || $value !== false) {
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return $value;
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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(string $key, $value, int $ttl = Duration::FIVE_MINUTES): bool
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{
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$cacheKey = $this->getCacheKey($key);
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// We store with the hostname as key to avoid problems with other applications
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if ($ttl > 0) {
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return $this->memcache->set(
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$cacheKey,
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serialize($value),
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MEMCACHE_COMPRESSED,
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time() + $ttl
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);
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} else {
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return $this->memcache->set(
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$cacheKey,
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serialize($value),
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MEMCACHE_COMPRESSED
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);
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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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public function delete(string $key): bool
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{
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$cacheKey = $this->getCacheKey($key);
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return $this->memcache->delete($cacheKey);
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}
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/**
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* (@inheritdoc)
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*/
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public function clear(bool $outdated = true): bool
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{
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if ($outdated) {
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return true;
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} else {
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return $this->memcache->flush();
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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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public function add(string $key, $value, int $ttl = Duration::FIVE_MINUTES): bool
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{
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$cacheKey = $this->getCacheKey($key);
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return $this->memcache->add($cacheKey, serialize($value), MEMCACHE_COMPRESSED, $ttl);
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}
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/**
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* {@inheritDoc}
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*/
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public function getName(): string
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{
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return Type::MEMCACHE;
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}
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}
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