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Add limit parameter to storage move query

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- Fixes out-of-memory errors with large tables
- Add database statement closing
- Add meaningful variable names
- Remove useless DBA::isResult check
This commit is contained in:
Hypolite Petovan 2019-03-20 00:41:57 -04:00
parent 8a48ff1f95
commit 8ddbeb087f
1 changed files with 34 additions and 35 deletions
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45
src/Core/StorageManager.php
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@ -111,20 +111,20 @@ class StorageManager
/**
* @brief Move resources to storage $dest
* @brief Move up to 5000 resources to storage $dest
*
* Copy existing data to destination storage and delete from source.
* This method cannot move to legacy in-table `data` field.
*
* @param string $dest Destination storage class name
* @param string $destination Storage class name
* @param array|null $tables Tables to look in for resources. Optional, defaults to ['photo', 'attach']
*
* @throws \Exception
* @param int $limit Limit of the process batch size, defaults to 5000
* @return int Number of moved resources
* @throws \Exception
*/
public static function move($dest, $tables = null)
public static function move($destination, $tables = null, $limit = 5000)
{
if (is_null($dest) || empty($dest)) {
if (empty($destination)) {
throw new \Exception('Can\'t move to NULL storage backend');
}
@ -135,35 +135,33 @@ class StorageManager
$moved = 0;
foreach ($tables as $table) {
// Get the rows where backend class is not the destination backend class
$rr = DBA::select(
$resources = DBA::select(
$table,
['id', 'data', 'backend-class', 'backend-ref'],
['`backend-class` IS NULL or `backend-class` != ?' , $dest ]
['`backend-class` IS NULL or `backend-class` != ?', $destination],
['limit' => $limit]
);
if (DBA::isResult($rr)) {
while($r = DBA::fetch($rr)) {
$id = $r['id'];
$data = $r['data'];
while ($resource = DBA::fetch($resources)) {
$id = $resource['id'];
$data = $resource['data'];
/** @var IStorage $backendClass */
$backendClass = $r['backend-class'];
$backendRef = $r['backend-ref'];
if (!is_null($backendClass) && $backendClass !== '') {
$backendClass = $resource['backend-class'];
$backendRef = $resource['backend-ref'];
if (!empty($backendClass)) {
Logger::log("get data from old backend " . $backendClass . " : " . $backendRef);
$data = $backendClass::get($backendRef);
}
Logger::log("save data to new backend " . $dest);
/** @var IStorage $dest */
$ref = $dest::put($data);
Logger::log("save data to new backend " . $destination);
/** @var IStorage $destination */
$ref = $destination::put($data);
Logger::log("saved data as " . $ref);
if ($ref !== '') {
Logger::log("update row");
$ru = DBA::update($table, ['backend-class' => $dest, 'backend-ref' => $ref, 'data' => ''], ['id' => $id]);
if ($ru) {
if (!is_null($backendClass) && $backendClass !== '') {
if (DBA::update($table, ['backend-class' => $destination, 'backend-ref' => $ref, 'data' => ''], ['id' => $id])) {
if (!empty($backendClass)) {
Logger::log("delete data from old backend " . $backendClass . " : " . $backendRef);
$backendClass::delete($backendRef);
}
@ -171,7 +169,8 @@ class StorageManager
}
}
}
}
DBA::close($resources);
}
return $moved;