forked from GNUsocial/gnu-social
143 lines
3.5 KiB
PHP
143 lines
3.5 KiB
PHP
<?php
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/*
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* Laconica - a distributed open-source microblogging tool
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* Copyright (C) 2008, Controlez-Vous, Inc.
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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 published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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 <http://www.gnu.org/licenses/>.
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*/
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if (!defined('LACONICA')) { exit(1); }
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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class Memcached_DataObject extends DB_DataObject
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{
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function &staticGet($cls, $k, $v=NULL) {
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$i = Memcached_DataObject::getcached($cls, $k, $v);
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if (!is_null($i)) {
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return $i;
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} else {
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$i = DB_DataObject::staticGet($cls, $k, $v);
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if (!is_null($i)) {
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$i->encache();
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}
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return $i;
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}
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}
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function insert() {
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$result = parent::insert();
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if ($result) {
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$this->encache();
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}
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return $result;
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}
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function update($orig=NULL) {
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if (!is_null($orig)) {
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$orig->decache(); # might be different keys
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}
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$result = parent::update($orig);
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if ($result) {
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$this->encache();
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}
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}
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function delete() {
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$this->decache(); # while we still have the values!
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return parent::delete();
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}
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static function memcache() {
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if (!common_config('memcached', 'enabled')) {
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return NULL;
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} else {
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$cache = new Memcache();
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$res = $cache->connect(common_config('memcached', 'server'),
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common_config('memcached', 'port'));
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return ($res) ? $cache : NULL;
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}
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}
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static function cacheKey($cls, $k, $v) {
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return common_cache_key(strtolower($cls).':'.$k.':'.$v);
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}
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static function getcached($cls, $k, $v) {
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$c = Memcached_DataObject::memcache();
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if (!$c) {
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return false;
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} else {
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return $c->get(Memcached_DataObject::cacheKey($cls, $k, $v));
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}
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}
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function keyTypes() {
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global $_DB_DATAOBJECT;
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if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
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$this->databaseStructure();
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}
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return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
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}
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function encache() {
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$c = $this->memcache();
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if (!$c) {
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return false;
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} else {
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$primary = array();
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$types = $this->keyTypes();
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ksort($types);
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foreach ($types as $key => $type) {
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if ($type == 'K') {
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$primary[] = $key;
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} else {
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$c->set($this->cacheKey($this->tableName(), $key, $this->$key),
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$this);
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}
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}
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# XXX: figure out what to do with compound pkeys
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if (count($primary) == 1) {
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$key = $primary[0];
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$c->set($this->cacheKey($this->tableName(), $key, $this->$key),
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$this);
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}
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}
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}
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function decache() {
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$c = $this->memcache();
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if (!$c) {
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return false;
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} else {
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$primary = array();
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$types = $this->keyTypes();
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ksort($types);
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foreach ($types as $key => $type) {
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if ($type == 'K') {
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$primary[] = $this->$key;
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} else {
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$c->delete($this->cacheKey($this->tableName(), $key, $this->$key));
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}
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}
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# XXX: figure out what to do with compound pkeys
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if (count($primary) == 1) {
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$key = $primary[0];
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$c->delete($this->cacheKey($this->tableName(), $key, $this->$key));
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}
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}
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}
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}
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