146 lines
2.9 KiB
PHP
146 lines
2.9 KiB
PHP
<?php
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namespace Friendica\Core\Cache;
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use Exception;
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use Friendica\Core\Config\Configuration;
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use Memcache;
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/**
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* Memcache Cache
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*
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* @author Hypolite Petovan <hypolite@mrpetovan.com>
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*/
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class MemcacheCache extends Cache implements IMemoryCache
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{
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use TraitCompareSet;
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use TraitCompareDelete;
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use TraitMemcacheCommand;
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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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* @throws Exception
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*/
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public function __construct(string $hostname, Configuration $config)
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{
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if (!class_exists('Memcache', false)) {
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throw new Exception('Memcache class isn\'t available');
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}
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parent::__construct($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 Exception('Expected Memcache server at ' . $this->server . ':' . $this->port . ' isn\'t available');
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}
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}
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/**
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* (@inheritdoc)
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*/
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public function getAllKeys($prefix = null)
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{
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$keys = $this->getOriginalKeys($this->getMemcacheKeys());
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return $this->filterArrayKeysByPrefix($keys, $prefix);
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}
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/**
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* (@inheritdoc)
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*/
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public function get($key)
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{
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$return = null;
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$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 $return;
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}
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$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 $return;
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}
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/**
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* (@inheritdoc)
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*/
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public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
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{
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$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($value),
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MEMCACHE_COMPRESSED
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);
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}
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}
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/**
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* (@inheritdoc)
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*/
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public function delete($key)
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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($outdated = true)
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{
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if ($outdated) {
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return true;
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} else {
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return $this->memcache->flush();
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}
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}
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/**
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* (@inheritdoc)
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*/
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public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
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{
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$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()
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{
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return self::TYPE_MEMCACHE;
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}
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}
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