PHP Database::beginTransaction方法代码示例

require './includes/session.php';
// Don't use ged=XX as we want to be able to run without changing the current gedcom.
// This will let us load several gedcoms together, or to edit one while loading another.
$gedcom_id = Filter::getInteger('gedcom_id');
$tree = Tree::findById($gedcom_id);
if (!$tree || !Auth::isManager($tree, Auth::user())) {
    http_response_code(403);
    return;
}
$controller = new AjaxController();
$controller->pageHeader();
// Don't allow the user to cancel the request.  We do not want to be left
// with an incomplete transaction.
ignore_user_abort(true);
// Run in a transaction
Database::beginTransaction();
// Only allow one process to import each gedcom at a time
Database::prepare("SELECT * FROM `##gedcom_chunk` WHERE gedcom_id=? FOR UPDATE")->execute(array($gedcom_id));
// What is the current import status?
$row = Database::prepare("SELECT" . " SUM(IF(imported, LENGTH(chunk_data), 0)) AS import_offset," . " SUM(LENGTH(chunk_data))                  AS import_total" . " FROM `##gedcom_chunk` WHERE gedcom_id=?")->execute(array($gedcom_id))->fetchOneRow();
if ($row->import_offset == $row->import_total) {
    Tree::findById($gedcom_id)->setPreference('imported', '1');
    // Finished?  Show the maintenance links, similar to admin_trees_manage.php
    Database::commit();
    $controller->addInlineJavascript('jQuery("#import' . $gedcom_id . '").addClass("hidden");' . 'jQuery("#actions' . $gedcom_id . '").removeClass("hidden");');
    return;
}
// Calculate progress so far
$progress = $row->import_offset / $row->import_total;
?>
<div class="progress" id="progress<?php 

 /**
  * {inhericDoc}
  * @see \MyArtJaub\Webtrees\Module\AdminTasks\Model\TaskProviderInterface::deleteTask()
  */
 public function deleteTask($task_name)
 {
     try {
         Database::beginTransaction();
         Database::prepare('DELETE FROM  `##maj_admintasks` WHERE majat_name= :task_name')->execute(array('task_name' => $task_name));
         Database::prepare('DELETE FROM  `##gedcom_setting` WHERE setting_name LIKE :setting_name')->execute(array('setting_name' => 'MAJ_AT_' . $task_name . '%'));
         Database::commit();
         Log::addConfigurationLog('Admin Task ' . $task_name . ' has been deleted from disk - deleting it from DB');
         return true;
     } catch (\Exception $ex) {
         Database::rollback();
         Log::addErrorLog('An error occurred while deleting Admin Task ' . $task_name . '. Exception: ' . $ex->getMessage());
         return false;
     }
 }

 /**
  * Import data from a gedcom file into this tree.
  *
  * @param string  $path       The full path to the (possibly temporary) file.
  * @param string  $filename   The preferred filename, for export/download.
  *
  * @throws \Exception
  */
 public function importGedcomFile($path, $filename)
 {
     // Read the file in blocks of roughly 64K.  Ensure that each block
     // contains complete gedcom records.  This will ensure we don’t split
     // multi-byte characters, as well as simplifying the code to import
     // each block.
     $file_data = '';
     $fp = fopen($path, 'rb');
     // Don’t allow the user to cancel the request.  We do not want to be left with an incomplete transaction.
     ignore_user_abort(true);
     Database::beginTransaction();
     $this->deleteGenealogyData($this->getPreference('keep_media'));
     $this->setPreference('gedcom_filename', $filename);
     $this->setPreference('imported', '0');
     while (!feof($fp)) {
         $file_data .= fread($fp, 65536);
         // There is no strrpos() function that searches for substrings :-(
         for ($pos = strlen($file_data) - 1; $pos > 0; --$pos) {
             if ($file_data[$pos] === '0' && ($file_data[$pos - 1] === "\n" || $file_data[$pos - 1] === "\r")) {
                 // We’ve found the last record boundary in this chunk of data
                 break;
             }
         }
         if ($pos) {
             Database::prepare("INSERT INTO `##gedcom_chunk` (gedcom_id, chunk_data) VALUES (?, ?)")->execute(array($this->tree_id, substr($file_data, 0, $pos)));
             $file_data = substr($file_data, $pos);
         }
     }
     Database::prepare("INSERT INTO `##gedcom_chunk` (gedcom_id, chunk_data) VALUES (?, ?)")->execute(array($this->tree_id, $file_data));
     Database::commit();
     fclose($fp);
 }

 /**
  * Update a geodispersion analysis in the database, in transactional manner.
  * When successful, returns the updated GeoAnalysis object
  *  
  * @param GeoAnalysis $ga
  * @return GeoAnalysis
  */
 public function updateGeoAnalysis(GeoAnalysis $ga)
 {
     try {
         Database::beginTransaction();
         Database::prepare('UPDATE `##maj_geodispersion`' . ' SET majgd_descr = :description,' . ' majgd_sublevel = :analysis_level,' . ' majgd_map = :map,' . ' majgd_toplevel = :map_top_level,' . ' majgd_useflagsgen = :use_flags,' . ' majgd_detailsgen = :gen_details' . ' WHERE majgd_file = :gedcom_id AND majgd_id = :ga_id')->execute(array('gedcom_id' => $this->tree->getTreeId(), 'ga_id' => $ga->getId(), 'description' => $ga->getTitle(), 'analysis_level' => $ga->getAnalysisLevel(), 'use_flags' => $ga->getOptions() && $ga->getOptions()->isUsingFlags() ? 'yes' : 'no', 'gen_details' => $ga->getOptions() ? $ga->getOptions()->getMaxDetailsInGen() : 0, 'map' => $ga->hasMap() ? $ga->getOptions()->getMap()->getFileName() : null, 'map_top_level' => $ga->hasMap() ? $ga->getOptions()->getMapLevel() : -100));
         $ga = $this->getGeoAnalysis($ga->getId(), false);
         Database::commit();
     } catch (\Exception $ex) {
         Database::rollback();
         Log::addErrorLog('The Geo Analysis ID “' . $ga->getId() . '” failed to be updated. Transaction rollbacked. Exception: ' . $ex->getMessage());
         $ga = null;
     }
     return $ga;
 }