gnu-social/plugins/RedisCache/RedisCachePlugin.php

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<?php
/**
* GNU social - a federating social network
*
* Plguin inplementing Redis based caching
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Files
* @package GNUsocial
* @author Chimo
* @author Miguel Dantas <biodantas@gmail.com>
* @copyright 2008-2009, 2019 Free Software Foundation http://fsf.org
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link https://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
class RedisCachePlugin extends Plugin
{
const VERSION = '0.0.1';
private $client = null;
public $defaultExpiry = 86400; // 24h
function onInitializePlugin()
{
$this->_ensureConn();
return true;
}
private function _ensureConn()
{
if ($this->client === null) {
$connection = common_config('rediscache', 'connection');
$this->client = new Predis\Client($connection);
}
}
function onStartCacheGet(&$key, &$value)
{
// Temporary work-around upstream bug
// see: https://github.com/chimo/gs-rediscache/issues/1
if ($key === Cache::key('profileall')) {
return true;
}
try {
$this->_ensureConn();
$ret = $this->client->get($key);
} catch(\Predis\PredisException $Ex) {
common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
return true;
}
// Hit, overwrite "value" and return false
// to indicate we took care of this
if ($ret !== null) {
$value = unserialize($ret);
Event::handle('EndCacheGet', array($key, &$value));
return false;
}
// Miss, let GS do its thing
return true;
}
function onStartCacheSet(&$key, &$value, &$flag, &$expiry, &$success)
{
// Temporary work-around upstream bug
// see: https://github.com/chimo/gs-rediscache/issues/1
if ($key === Cache::key('profileall')) {
return true;
}
if ($expiry === null) {
$expiry = $this->defaultExpiry;
}
try {
$this->_ensureConn();
$ret = $this->client->setex($key, $expiry, serialize($value));
} catch(\Predis\PredisException $Ex) {
common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
return true;
}
if ($ret->getPayload() === "OK") {
$success = true;
Event::handle('EndCacheSet', array($key, $value, $flag, $expiry));
return false;
}
return true;
}
function onStartCacheDelete($key)
{
try {
$this->_ensureConn();
$this->client->del($key);
} catch(\Predis\PredisException $Ex) {
common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
}
// Let other Caches delete stuff if they want to
return true;
}
function onStartCacheIncrement(&$key, &$step, &$value)
{
try {
$this->_ensureConn();
// TODO: handle when this fails
$this->client->incrby($key, $step);
} catch(\Predis\PredisException $Ex) {
common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
return true;
}
Event::handle('EndCacheIncrement', array($key, $step, $value));
return false;
}
function onPluginVersion(array &$versions)
{
$versions[] = array('name' => 'RedisCache',
'version' => self::VERSION,
'author' => 'chimo',
'homepage' => 'https://github.com/chimo/gs-rediscache',
'description' =>
// TRANS: Plugin description.
_m('')); // TODO
return true;
}
}