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Db.php
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Db.php
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<?php
/**
* Magento Enterprise Edition
*
* NOTICE OF LICENSE
*
* This source file is subject to the Magento Enterprise Edition License
* that is bundled with this package in the file LICENSE_EE.txt.
* It is also available through the world-wide-web at this URL:
* http://www.magentocommerce.com/license/enterprise-edition
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@magentocommerce.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade Magento to newer
* versions in the future. If you wish to customize Magento for your
* needs please refer to http://www.magentocommerce.com for more information.
*
* @category Mage
* @package Mage_Backup
* @copyright Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
* @license http://www.magentocommerce.com/license/enterprise-edition
*/
/**
* Database backup model
*
* @category Mage
* @package Mage_Backup
* @author Magento Core Team <core@magentocommerce.com>
*/
class Mage_Backup_Model_Db
{
/**
* Buffer length for multi rows
* default 512 Kb
*
*/
const BUFFER_LENGTH = 524288;
/**
* Retrieve resource model
*
* @return Mage_Backup_Model_Mysql4_Db
*/
public function getResource()
{
return Mage::getResourceSingleton('backup/db');
}
public function getTables()
{
return $this->getResource()->getTables();
}
public function getTableCreateScript($tableName, $addDropIfExists=false)
{
return $this->getResource()->getTableCreateScript($tableName, $addDropIfExists);
}
public function getTableDataDump($tableName)
{
return $this->getResource()->getTableDataDump($tableName);
}
public function getHeader()
{
return $this->getResource()->getHeader();
}
public function getFooter()
{
return $this->getResource()->getFooter();
}
public function renderSql()
{
ini_set('max_execution_time', 0);
$sql = $this->getHeader();
$tables = $this->getTables();
foreach ($tables as $tableName) {
$sql.= $this->getTableCreateScript($tableName, true);
$sql.= $this->getTableDataDump($tableName);
}
$sql.= $this->getFooter();
return $sql;
}
/**
* Create backup and stream write to adapter
*
* @param Mage_Backup_Model_Backup $backup
* @return Mage_Backup_Model_Db
*/
public function createBackup(Mage_Backup_Model_Backup $backup)
{
$backup->open(true);
$this->getResource()->beginTransaction();
$tables = $this->getResource()->getTables();
$backup->write($this->getResource()->getHeader());
foreach ($tables as $table) {
$backup->write($this->getResource()->getTableHeader($table) . $this->getResource()->getTableDropSql($table) . "\n");
$backup->write($this->getResource()->getTableCreateSql($table, false) . "\n");
$tableStatus = $this->getResource()->getTableStatus($table);
if ($tableStatus->getRows()) {
$backup->write($this->getResource()->getTableDataBeforeSql($table));
if ($tableStatus->getDataLength() > self::BUFFER_LENGTH) {
if ($tableStatus->getAvgRowLength() < self::BUFFER_LENGTH) {
$limit = floor(self::BUFFER_LENGTH / $tableStatus->getAvgRowLength());
$multiRowsLength = ceil($tableStatus->getRows() / $limit);
}
else {
$limit = 1;
$multiRowsLength = $tableStatus->getRows();
}
}
else {
$limit = $tableStatus->getRows();
$multiRowsLength = 1;
}
for ($i = 0; $i < $multiRowsLength; $i ++) {
$backup->write($this->getResource()->getTableDataSql($table, $limit, $i*$limit));
}
$backup->write($this->getResource()->getTableDataAfterSql($table));
}
}
$backup->write($this->getResource()->getTableForeignKeysSql());
$backup->write($this->getResource()->getFooter());
$this->getResource()->commitTransaction();
$backup->close();
return $this;
}
}