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phab/src/applications/files/engine/mysql/PhabricatorMySQLFileStorageEngine.php
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PhabricatorMySQLFileStorageEngine.php
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<?php
/*
* Copyright 2011 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.
*/
/**
* MySQL blob storage engine. This engine is the easiest to set up but doesn't
* scale very well.
*
* It uses the @{class:PhabricatorFileStorageBlob} to actually access the
* underlying database table.
*
* @task impl Implementation
* @task internal Internals
* @group filestorage
*/
final class PhabricatorMySQLFileStorageEngine
extends PhabricatorFileStorageEngine {
/* -( Implementation )----------------------------------------------------- */
/**
* For historical reasons, this engine identifies as "blob".
*
* @task impl
*/
public function getEngineIdentifier() {
return 'blob';
}
/**
* Write file data into the big blob store table in MySQL. Returns the row
* ID as the file data handle.
*
* @task impl
*/
public function writeFile($data, array $params) {
$blob = new PhabricatorFileStorageBlob();
$blob->setData($data);
$blob->save();
return $blob->getID();
}
/**
* Load a stored blob from MySQL.
* @task impl
*/
public function readFile($handle) {
return $this->loadFromMySQLFileStorage($handle)->getData();
}
/**
* Delete a blob from MySQL.
* @task impl
*/
public function deleteFile($handle) {
$this->loadFromMySQLFileStorage($handle)->delete();
}
/* -( Internals )---------------------------------------------------------- */
/**
* Load the Lisk object that stores the file data for a handle.
*
* @param string File data handle.
* @return PhabricatorFileStorageBlob Data DAO.
* @task internal
*/
private function loadFromMySQLFileStorage($handle) {
$blob = id(new PhabricatorFileStorageBlob())->load($handle);
if (!$blob) {
throw new Exception("Unable to load MySQL blob file '{$handle}'!");
}
return $blob;
}
}
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