forked from GNUsocial/gnu-social
78214c4e06
Should fix seemingly-random bugs due to destructor free()ing local resources by mistake. cherry-pick from 0.9.x
391 lines
11 KiB
PHP
391 lines
11 KiB
PHP
<?php
|
|
/*
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2008, 2009, StatusNet, 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('STATUSNET') && !defined('LACONICA')) { exit(1); }
|
|
|
|
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
|
|
|
|
class Memcached_DataObject extends DB_DataObject
|
|
{
|
|
/**
|
|
* Destructor to free global memory resources associated with
|
|
* this data object when it's unset or goes out of scope.
|
|
* DB_DataObject doesn't do this yet by itself.
|
|
*/
|
|
|
|
function __destruct()
|
|
{
|
|
$this->free();
|
|
if (method_exists('DB_DataObject', '__destruct')) {
|
|
parent::__destruct();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Magic function called at serialize() time.
|
|
*
|
|
* We use this to drop a couple process-specific references
|
|
* from DB_DataObject which can cause trouble in future
|
|
* processes.
|
|
*
|
|
* @return array of variable names to include in serialization.
|
|
*/
|
|
function __sleep()
|
|
{
|
|
$vars = array_keys(get_object_vars($this));
|
|
$skip = array('_DB_resultid', '_link_loaded');
|
|
return array_diff($vars, $skip);
|
|
}
|
|
|
|
/**
|
|
* Magic function called at unserialize() time.
|
|
*
|
|
* Clean out some process-specific variables which might
|
|
* be floating around from a previous process's cached
|
|
* objects.
|
|
*
|
|
* Old cached objects may still have them.
|
|
*/
|
|
function __wakeup()
|
|
{
|
|
// Refers to global state info from a previous process.
|
|
// Clear this out so we don't accidentally break global
|
|
// state in *this* process.
|
|
$this->_DB_resultid = null;
|
|
|
|
// We don't have any local DBO refs, so clear these out.
|
|
$this->_link_loaded = false;
|
|
}
|
|
|
|
/**
|
|
* Wrapper for DB_DataObject's static lookup using memcached
|
|
* as backing instead of an in-process cache array.
|
|
*
|
|
* @param string $cls classname of object type to load
|
|
* @param mixed $k key field name, or value for primary key
|
|
* @param mixed $v key field value, or leave out for primary key lookup
|
|
* @return mixed Memcached_DataObject subtype or false
|
|
*/
|
|
function &staticGet($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 {
|
|
$i = DB_DataObject::factory($cls);
|
|
if (empty($i)) {
|
|
return false;
|
|
}
|
|
$result = $i->get($k, $v);
|
|
if ($result) {
|
|
$i->encache();
|
|
return $i;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
function &pkeyGet($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, $v) {
|
|
if (is_object($cls) || is_object($k) || is_object($v)) {
|
|
$e = new Exception();
|
|
common_log(LOG_ERR, __METHOD__ . ' object in param: ' .
|
|
str_replace("\n", " ", $e->getTraceAsString()));
|
|
}
|
|
return common_cache_key(strtolower($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)) {
|
|
if (Event::handle('GetSearchEngine', array($this, $table, &$search_engine))) {
|
|
if ('mysql' === common_config('db', 'type')) {
|
|
$type = common_config('search', 'type');
|
|
if ($type == 'like') {
|
|
$search_engine = new MySQLLikeSearch($this, $table);
|
|
} else if ($type == 'fulltext') {
|
|
$search_engine = new MySQLSearch($this, $table);
|
|
} else {
|
|
throw new ServerException('Unknown search type: ' . $type);
|
|
}
|
|
} 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);
|
|
}
|
|
|
|
// We overload so that 'SET NAMES "utf8"' is called for
|
|
// each connection
|
|
|
|
function _connect()
|
|
{
|
|
global $_DB_DATAOBJECT;
|
|
|
|
$sum = $this->_getDbDsnMD5();
|
|
|
|
if (!empty($_DB_DATAOBJECT['CONNECTIONS'][$sum]) &&
|
|
!PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$sum])) {
|
|
$exists = true;
|
|
} else {
|
|
$exists = false;
|
|
}
|
|
|
|
$result = parent::_connect();
|
|
|
|
if ($result && !$exists) {
|
|
$DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
|
|
if (common_config('db', 'type') == 'mysql' &&
|
|
common_config('db', 'utf8')) {
|
|
$conn = $DB->connection;
|
|
if (!empty($conn)) {
|
|
if ($DB instanceof DB_mysqli) {
|
|
mysqli_set_charset($conn, 'utf8');
|
|
} else if ($DB instanceof DB_mysql) {
|
|
mysql_set_charset('utf8', $conn);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
// XXX: largely cadged from DB_DataObject
|
|
|
|
function _getDbDsnMD5()
|
|
{
|
|
if ($this->_database_dsn_md5) {
|
|
return $this->_database_dsn_md5;
|
|
}
|
|
|
|
$dsn = $this->_getDbDsn();
|
|
|
|
if (is_string($dsn)) {
|
|
$sum = md5($dsn);
|
|
} else {
|
|
/// support array based dsn's
|
|
$sum = md5(serialize($dsn));
|
|
}
|
|
|
|
return $sum;
|
|
}
|
|
|
|
function _getDbDsn()
|
|
{
|
|
global $_DB_DATAOBJECT;
|
|
|
|
if (empty($_DB_DATAOBJECT['CONFIG'])) {
|
|
DB_DataObject::_loadConfig();
|
|
}
|
|
|
|
$options = &$_DB_DATAOBJECT['CONFIG'];
|
|
|
|
// if the databse dsn dis defined in the object..
|
|
|
|
$dsn = isset($this->_database_dsn) ? $this->_database_dsn : null;
|
|
|
|
if (!$dsn) {
|
|
|
|
if (!$this->_database) {
|
|
$this->_database = isset($options["table_{$this->__table}"]) ? $options["table_{$this->__table}"] : null;
|
|
}
|
|
|
|
if ($this->_database && !empty($options["database_{$this->_database}"])) {
|
|
$dsn = $options["database_{$this->_database}"];
|
|
} else if (!empty($options['database'])) {
|
|
$dsn = $options['database'];
|
|
}
|
|
}
|
|
|
|
if (!$dsn) {
|
|
throw new Exception("No database name / dsn found anywhere");
|
|
}
|
|
|
|
return $dsn;
|
|
}
|
|
}
|