gnu-social/classes/Memcached_DataObject.php
Evan Prodromou 068f6801cc Revert "run 'set names' after each connection to deal with UTF8 correctly"
This reverts commit 84072aa5cf.

This commit caused grievous harm to old notices on identi.ca.
Reverting until we figure out how to convert the old notices.
2009-04-26 12:27:32 -04:00

231 lines
6.7 KiB
PHP

<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
*
* 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/>.
*/
if (!defined('LACONICA')) { exit(1); }
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
class Memcached_DataObject extends DB_DataObject
{
function &staticGet($cls, $k, $v=null)
{
if (is_null($v)) {
$v = $k;
# XXX: HACK!
$i = new $cls;
$keys = $i->keys();
$k = $keys[0];
unset($i);
}
$i = Memcached_DataObject::getcached($cls, $k, $v);
if ($i) {
return $i;
} else {
$i = DB_DataObject::staticGet($cls, $k, $v);
if ($i) {
$i->encache();
}
return $i;
}
}
function &pkeyGet($cls, $kv)
{
$i = Memcached_DataObject::multicache($cls, $kv);
if ($i) {
return $i;
} else {
$i = new $cls();
foreach ($kv as $k => $v) {
$i->$k = $v;
}
if ($i->find(true)) {
$i->encache();
} else {
$i = null;
}
return $i;
}
}
function insert()
{
$result = parent::insert();
return $result;
}
function update($orig=null)
{
if (is_object($orig) && $orig instanceof Memcached_DataObject) {
$orig->decache(); # might be different keys
}
$result = parent::update($orig);
if ($result) {
$this->encache();
}
return $result;
}
function delete()
{
$this->decache(); # while we still have the values!
return parent::delete();
}
static function memcache() {
return common_memcache();
}
static function cacheKey($cls, $k, $v) {
return common_cache_key(strtolower($cls).':'.$k.':'.$v);
}
static function getcached($cls, $k, $v) {
$c = Memcached_DataObject::memcache();
if (!$c) {
return false;
} else {
return $c->get(Memcached_DataObject::cacheKey($cls, $k, $v));
}
}
function keyTypes()
{
global $_DB_DATAOBJECT;
if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
$this->databaseStructure();
}
return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
}
function encache()
{
$c = $this->memcache();
if (!$c) {
return false;
} else {
$pkey = array();
$pval = array();
$types = $this->keyTypes();
ksort($types);
foreach ($types as $key => $type) {
if ($type == 'K') {
$pkey[] = $key;
$pval[] = $this->$key;
} else {
$c->set($this->cacheKey($this->tableName(), $key, $this->$key), $this);
}
}
# XXX: should work for both compound and scalar pkeys
$pvals = implode(',', $pval);
$pkeys = implode(',', $pkey);
$c->set($this->cacheKey($this->tableName(), $pkeys, $pvals), $this);
}
}
function decache()
{
$c = $this->memcache();
if (!$c) {
return false;
} else {
$pkey = array();
$pval = array();
$types = $this->keyTypes();
ksort($types);
foreach ($types as $key => $type) {
if ($type == 'K') {
$pkey[] = $key;
$pval[] = $this->$key;
} else {
$c->delete($this->cacheKey($this->tableName(), $key, $this->$key));
}
}
# should work for both compound and scalar pkeys
# XXX: comma works for now but may not be safe separator for future keys
$pvals = implode(',', $pval);
$pkeys = implode(',', $pkey);
$c->delete($this->cacheKey($this->tableName(), $pkeys, $pvals));
}
}
function multicache($cls, $kv)
{
ksort($kv);
$c = Memcached_DataObject::memcache();
if (!$c) {
return false;
} else {
$pkeys = implode(',', array_keys($kv));
$pvals = implode(',', array_values($kv));
return $c->get(Memcached_DataObject::cacheKey($cls, $pkeys, $pvals));
}
}
function getSearchEngine($table)
{
require_once INSTALLDIR.'/lib/search_engines.php';
static $search_engine;
if (!isset($search_engine)) {
$connected = false;
if (common_config('sphinx', 'enabled')) {
$search_engine = new SphinxSearch($this, $table);
$connected = $search_engine->is_connected();
}
// unable to connect to sphinx' search daemon
if (!$connected) {
if ('mysql' === common_config('db', 'type')) {
$search_engine = new MySQLSearch($this, $table);
} else {
$search_engine = new PGSearch($this, $table);
}
}
}
return $search_engine;
}
static function cachedQuery($cls, $qry, $expiry=3600)
{
$c = Memcached_DataObject::memcache();
if (!$c) {
$inst = new $cls();
$inst->query($qry);
return $inst;
}
$key_part = common_keyize($cls).':'.md5($qry);
$ckey = common_cache_key($key_part);
$stored = $c->get($ckey);
if ($stored) {
return new ArrayWrapper($stored);
}
$inst = new $cls();
$inst->query($qry);
$cached = array();
while ($inst->fetch()) {
$cached[] = clone($inst);
}
$inst->free();
$c->set($ckey, $cached, MEMCACHE_COMPRESSED, $expiry);
return new ArrayWrapper($cached);
}
}