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PhabricatorFileStorageBlob.php
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Wed, Apr 30, 11:57

PhabricatorFileStorageBlob.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Simple blob store DAO for @{class:PhabricatorMySQLFileStorageEngine}.
*
* @group filestorage
*/
final class PhabricatorFileStorageBlob extends PhabricatorFileDAO {
// max_allowed_packet defaults to 1 MiB, escaping can make the data twice
// longer, query fits in the rest.
const CHUNK_SIZE = 5e5;
protected $data;
private $fullData;
protected function willWriteData(array &$data) {
parent::willWriteData($data);
$this->fullData = $data['data'];
if (strlen($data['data']) > self::CHUNK_SIZE) {
$data['data'] = substr($data['data'], 0, self::CHUNK_SIZE);
$this->openTransaction();
}
}
protected function didWriteData() {
$size = self::CHUNK_SIZE;
$length = strlen($this->fullData);
if ($length > $size) {
$conn = $this->establishConnection('w');
for ($offset = $size; $offset < $length; $offset += $size) {
queryfx(
$conn,
'UPDATE %T SET data = CONCAT(data, %s) WHERE %C = %d',
$this->getTableName(),
substr($this->fullData, $offset, $size),
$this->getIDKeyForUse(),
$this->getID());
}
$this->saveTransaction();
}
parent::didWriteData();
}
}

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