mirror of https://github.com/friendica/friendica
Merge pull request #4549 from MrPetovan/task/4518-add-memcached-support
[develop] Performance: Add memcached support/Improve database cache (redux)pull/4561/head
Michael Vogel
5 years ago
committed by
GitHub
commit
cc688e2b4f
@ -1,11 +1,13 @@
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Table cache
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===========
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Stores temporary data
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| Field | Description | Type | Null | Key | Default | Extra |
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| ------------ | ---------------------------------- | ------------ | ---- | --- | ------------------- | ----- |
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| k | horizontal width + url or resource | varchar(255) | NO | PRI | NULL | |
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| v | OEmbed response from site | text | NO | | NULL | |
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| k | cache key | varchar(255) | NO | PRI | NULL | |
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| v | cached serialized value | text | NO | | NULL | |
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| expires | datetime of cache expiration | datetime | NO | MUL | 0001-01-01 00:00:00 | |
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| updated | datetime of cache insertion | datetime | NO | MUL | 0001-01-01 00:00:00 | |
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| expire_mode | | int(11) | NO | | 0 | |
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Return to [database documentation](help/database)
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File diff suppressed because one or more lines are too long
@ -0,0 +1,56 @@
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<?php
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namespace Friendica\Core\Cache;
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use dba;
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use Friendica\Core\Cache;
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use Friendica\Database\DBM;
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use Friendica\Util\DateTimeFormat;
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/**
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* Database Cache Driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class DatabaseCacheDriver implements ICacheDriver
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{
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public function get($key)
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{
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$cache = dba::selectFirst('cache', ['v'], ['`k` = ? AND `expires` >= ?', $key, DateTimeFormat::utcNow()]);
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if (DBM::is_result($cache)) {
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$cached = $cache['v'];
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$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 $value;
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}
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}
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return null;
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}
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public function set($key, $value, $duration = Cache::MONTH)
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{
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$fields = [
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'v' => serialize($value),
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'expires' => DateTimeFormat::utc('now + ' . Cache::duration($duration) . ' seconds'),
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'updated' => DateTimeFormat::utcNow()
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];
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return dba::update('cache', $fields, ['k' => $key], true);
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}
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public function delete($key)
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{
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return dba::delete('cache', ['k' => $key]);
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}
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public function clear()
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{
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return dba::delete('cache', ['`expires` < NOW()']);
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}
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}
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@ -0,0 +1,50 @@
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<?php
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namespace Friendica\Core\Cache;
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use Friendica\Core\Cache;
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/**
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* Cache Driver Interface
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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interface ICacheDriver
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{
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/**
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* Fetches cached data according to the key
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*
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* @param string $key The key to the cached data
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*
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* @return mixed Cached $value or "null" if not found
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*/
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public function get($key);
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/**
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* Stores data in the cache identified by the key. The input $value can have multiple formats.
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*
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* @param string $key The cache key
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* @param mixed $value The value to store
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* @param integer $duration The cache lifespan, must be one of the Cache constants
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*
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* @return bool
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*/
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public function set($key, $value, $duration = Cache::MONTH);
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/**
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* Delete a key from the cache
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*
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* @param string $key
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*
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* @return bool
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*/
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public function delete($key);
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/**
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* Remove outdated data from the cache
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*
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* @return bool
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*/
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public function clear();
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}
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@ -0,0 +1,77 @@
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<?php
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namespace Friendica\Core\Cache;
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use Friendica\BaseObject;
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use Friendica\Core\Cache;
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/**
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* Memcache Cache Driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class MemcacheCacheDriver extends BaseObject implements ICacheDriver
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{
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/**
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* @var Memcache
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*/
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private $memcache;
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public function __construct($memcache_host, $memcache_port)
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{
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if (!class_exists('Memcache', false)) {
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throw new \Exception('Memcache class isn\'t available');
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}
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$this->memcache = new \Memcache();
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if (!$this->memcache->connect($memcache_host, $memcache_port)) {
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throw new \Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
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}
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}
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public function get($key)
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{
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$return = null;
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// We fetch with the hostname as key to avoid problems with other applications
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$cached = $this->memcache->get(self::getApp()->get_hostname() . ':' . $key);
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// @see http://php.net/manual/en/memcache.get.php#84275
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if (is_bool($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 $return;
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}
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public function set($key, $value, $duration = Cache::MONTH)
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{
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// We store with the hostname as key to avoid problems with other applications
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return $this->memcache->set(
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self::getApp()->get_hostname() . ":" . $key,
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serialize($value),
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MEMCACHE_COMPRESSED,
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Cache::duration($duration)
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);
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}
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public function delete($key)
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{
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return $this->memcache->delete($key);
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}
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public function clear()
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{
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return true;
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}
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}
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@ -0,0 +1,68 @@
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<?php
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namespace Friendica\Core\Cache;
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use Friendica\BaseObject;
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use Friendica\Core\Cache;
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/**
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* Memcached Cache Driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class MemcachedCacheDriver extends BaseObject implements ICacheDriver
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{
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/**
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* @var Memcached
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*/
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private $memcached;
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public function __construct(array $memcached_hosts)
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{
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if (!class_exists('Memcached', false)) {
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throw new \Exception('Memcached class isn\'t available');
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}
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$this->memcached = new \Memcached();
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$this->memcached->addServers($memcached_hosts);
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if (count($this->memcached->getServerList()) == 0) {
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throw new \Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
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}
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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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// We fetch with the hostname as key to avoid problems with other applications
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$value = $this->memcached->get(self::getApp()->get_hostname() . ':' . $key);
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if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {
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$return = $value;
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}
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return $return;
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}
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public function set($key, $value, $duration = Cache::MONTH)
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{
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// We store with the hostname as key to avoid problems with other applications
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return $this->memcached->set(
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self::getApp()->get_hostname() . ":" . $key,
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$value,
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Cache::duration($duration)
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);
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}
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public function delete($key)
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{
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return $this->memcached->delete($key);
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}
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public function clear()
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{
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return true;
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}
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}
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