/**
  * @return bool
  */
 public function perform()
 {
     $this->progressBar->start(count($this->source->getDocumentList()), LogManager::LOG_LEVEL_INFO);
     $sourceDocuments = $this->source->getDocumentList();
     $stage = 'run';
     $processedDocuments = $this->progress->getProcessedEntities($this, $stage);
     foreach (array_diff($sourceDocuments, $processedDocuments) as $sourceDocName) {
         $this->progressBar->advance(LogManager::LOG_LEVEL_INFO);
         $sourceDocument = $this->source->getDocument($sourceDocName);
         $destinationName = $this->map->getDocumentMap($sourceDocName, MapInterface::TYPE_SOURCE);
         if (!$destinationName) {
             continue;
         }
         $destDocument = $this->destination->getDocument($destinationName);
         $this->destination->clearDocument($destinationName);
         $this->logger->debug('migrating', ['table' => $sourceDocName]);
         $recordTransformer = $this->getRecordTransformer($sourceDocument, $destDocument);
         $doCopy = $recordTransformer === null && $this->copyDirectly;
         if ($doCopy && $this->isCopiedDirectly($sourceDocument, $destDocument)) {
             $this->progressBar->start(1, LogManager::LOG_LEVEL_DEBUG);
         } else {
             $pageNumber = 0;
             $this->progressBar->start(ceil($this->source->getRecordsCount($sourceDocName) / $this->source->getPageSize($sourceDocName)), LogManager::LOG_LEVEL_DEBUG);
             while (!empty($items = $this->source->getRecords($sourceDocName, $pageNumber))) {
                 $pageNumber++;
                 $destinationRecords = $destDocument->getRecords();
                 foreach ($items as $data) {
                     if ($recordTransformer) {
                         /** @var Record $record */
                         $record = $this->recordFactory->create(['document' => $sourceDocument, 'data' => $data]);
                         /** @var Record $destRecord */
                         $destRecord = $this->recordFactory->create(['document' => $destDocument]);
                         $recordTransformer->transform($record, $destRecord);
                     } else {
                         $destRecord = $this->recordFactory->create(['document' => $destDocument, 'data' => $data]);
                     }
                     $destinationRecords->addRecord($destRecord);
                 }
                 $this->source->setLastLoadedRecord($sourceDocName, end($items));
                 $this->progressBar->advance(LogManager::LOG_LEVEL_DEBUG);
                 $fieldsUpdateOnDuplicate = $this->helper->getFieldsUpdateOnDuplicate($destinationName);
                 $this->destination->saveRecords($destinationName, $destinationRecords, $fieldsUpdateOnDuplicate);
             }
         }
         $this->source->setLastLoadedRecord($sourceDocName, []);
         $this->progress->addProcessedEntity($this, $stage, $sourceDocName);
         $this->progressBar->finish(LogManager::LOG_LEVEL_DEBUG);
     }
     $this->progressBar->finish(LogManager::LOG_LEVEL_INFO);
     return true;
 }
 /**
  * @return bool
  */
 public function perform()
 {
     $this->progress->start($this->getIterationsCount(), LogManager::LOG_LEVEL_INFO);
     $sourceDocuments = array_keys($this->readerGroups->getGroup('source_documents'));
     foreach ($sourceDocuments as $sourceDocName) {
         $sourceDocument = $this->source->getDocument($sourceDocName);
         $destinationName = $this->map->getDocumentMap($sourceDocName, MapInterface::TYPE_SOURCE);
         if (!$destinationName) {
             continue;
         }
         $destDocument = $this->destination->getDocument($destinationName);
         $this->destination->clearDocument($destinationName);
         /** @var \Migration\RecordTransformer $recordTransformer */
         $recordTransformer = $this->recordTransformerFactory->create(['sourceDocument' => $sourceDocument, 'destDocument' => $destDocument, 'mapReader' => $this->map]);
         $recordTransformer->init();
         $attributeType = $this->helper->getAttributeType($sourceDocName);
         $pageNumber = 0;
         $this->logger->debug('migrating', ['table' => $sourceDocName]);
         $this->progress->start(ceil($this->source->getRecordsCount($sourceDocName) / $this->source->getPageSize($sourceDocName)), LogManager::LOG_LEVEL_DEBUG);
         while (!empty($bulk = $this->source->getRecords($sourceDocName, $pageNumber))) {
             $pageNumber++;
             $destinationRecords = $destDocument->getRecords();
             foreach ($bulk as $recordData) {
                 $this->source->setLastLoadedRecord($sourceDocName, $recordData);
                 if ($this->helper->isSkipRecord($attributeType, $sourceDocName, $recordData)) {
                     continue;
                 }
                 /** @var Record $record */
                 $record = $this->recordFactory->create(['document' => $sourceDocument, 'data' => $recordData]);
                 /** @var Record $destRecord */
                 $destRecord = $this->recordFactory->create(['document' => $destDocument]);
                 $recordTransformer->transform($record, $destRecord);
                 $destinationRecords->addRecord($destRecord);
             }
             $this->progress->advance(LogManager::LOG_LEVEL_INFO);
             $this->progress->advance(LogManager::LOG_LEVEL_DEBUG);
             $this->helper->updateAttributeData($attributeType, $sourceDocName, $destinationRecords);
             $this->destination->saveRecords($destinationName, $destinationRecords);
         }
         $this->progress->finish(LogManager::LOG_LEVEL_DEBUG);
     }
     $this->helper->updateEavAttributes();
     $this->progress->finish(LogManager::LOG_LEVEL_INFO);
     return true;
 }