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<?php |
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/** |
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* File was created 28.04.2016 07:05 |
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*/ |
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namespace PeekAndPoke\Component\Slumber\Data\Addon\Journal; |
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use PeekAndPoke\Component\Slumber\Data\Addon\Journal\DomainModel\JournalEntry; |
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use PeekAndPoke\Component\Slumber\Data\Addon\Journal\DomainModel\JournalStats; |
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use PeekAndPoke\Component\Slumber\Data\Addon\Journal\DomainModel\Record; |
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use PeekAndPoke\Component\Slumber\Data\Addon\Journal\DomainModel\RecordableHistory; |
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use PeekAndPoke\Component\Slumber\Data\Addon\Journal\Exception\JournalRuntimeException; |
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use PeekAndPoke\Component\Slumber\Data\Storage; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\NullLogger; |
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/** |
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* @author Karsten J. Gerber <[email protected]> |
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*/ |
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class JournalWriterImpl implements JournalWriter |
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{ |
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/** @var Storage */ |
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private $storage; |
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/** @var JournalEntryRepository */ |
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private $repository; |
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/** @var LoggerInterface */ |
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private $logger; |
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/** |
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* JournalWriter constructor. |
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* |
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* @param Storage $storage |
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* @param JournalEntryRepository $repository |
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* @param LoggerInterface $logger |
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*/ |
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public function __construct(Storage $storage, JournalEntryRepository $repository, LoggerInterface $logger = null) |
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{ |
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$this->storage = $storage; |
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$this->repository = $repository; |
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$this->logger = $logger ?: new NullLogger(); |
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} |
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/** |
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* @param mixed $subject |
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* @param array $serializedData |
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*/ |
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public function write($subject, $serializedData) |
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{ |
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$entry = JournalEntry::create( |
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$this->buildExternalReference($subject), |
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$serializedData |
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); |
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$this->repository->save($entry); |
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} |
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/** |
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* @return JournalStats |
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*/ |
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public function getStats() |
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{ |
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$numRecords = $this->repository->getRecordsCount(); |
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$numCompacted = $this->repository->getCompactedRecordsCount(); |
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return new JournalStats($numRecords, $numCompacted); |
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} |
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/** |
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* @param mixed|string $subject |
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* |
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* @return RecordableHistory |
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*/ |
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public function getHistory($subject) |
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{ |
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$externalRef = $this->buildExternalReference($subject); |
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/** @var Record[] $records */ |
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$records = $this->repository->findByExternalReference($externalRef)->toArray(); |
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return new RecordableHistory($records); |
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} |
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/** |
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* @param string $externalReference |
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* |
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* @return RecordableHistory |
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* |
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* @throws \Exception |
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*/ |
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public function compact($externalReference) |
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{ |
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$history = $this->getHistory($externalReference); |
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// create the compacted entry |
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$compactedEntry = $this->repository->createRecord(); |
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$compactedEntry->setChangeDate($history->getFinalRecord()->getChangeDate()); |
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$compactedEntry->setExternalReference($externalReference); |
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$compactedEntry->setCompactedHistory($history); |
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$this->repository->save($compactedEntry); |
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// delete all the other entries |
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foreach ($history->getRecords() as $record) { |
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$this->repository->remove($record); |
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} |
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return $history; |
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} |
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/** |
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* Compacts the given number of recorded journal histories |
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* |
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* @param int $batchSize |
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*/ |
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public function compactOldest($batchSize) |
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{ |
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$subBatchSize = 1000; |
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for ($i = 0; $i < $batchSize; $i += $subBatchSize) { |
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$oldestEntries = $this->repository->findOldestNotCompacted($subBatchSize); |
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$this->logger->info('Will compact ' . ($i + $subBatchSize) . ' / ' . $batchSize . ' / ' . \count($oldestEntries) . ' of the oldest entries'); |
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if (\count($oldestEntries) === 0) { |
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return; |
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} |
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foreach ($oldestEntries as $oldest) { |
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$extRef = $oldest->getExternalReference(); |
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try { |
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$history = $this->compact($extRef); |
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$this->logger->info('Compacted ' . $extRef . ' with ' . \count($history->getDiffs()) . ' entries'); |
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} catch (\Exception $e) { |
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$this->logger->error('Cannot compact ' . $extRef . ': ' . $e->getMessage()); |
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} |
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} |
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// do not hold to many references and free up memory |
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$this->storage->getEntityPool()->clear(); |
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} |
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} |
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/** |
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* @param mixed|string $subject |
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* |
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* @return string |
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* @throws JournalRuntimeException |
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*/ |
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public function buildExternalReference($subject) |
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{ |
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if (is_scalar($subject)) { |
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return (string) $subject; |
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} |
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$repo = $this->storage->getRepositoryByEntity($subject); |
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if ($repo === null) { |
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return null; |
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} |
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$repoName = $repo->getName(); |
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$reflect = new \ReflectionClass($subject); |
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if ($reflect->hasProperty('reference')) { |
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$prop = $reflect->getProperty('reference'); |
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} else if ($reflect->hasProperty('id')) { |
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$prop = $reflect->getProperty('id'); |
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} else { |
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throw new JournalRuntimeException('Cannot calculate external reference for ' . $reflect->name . '. Needs property "id" or "reference"'); |
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} |
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$prop->setAccessible(true); |
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return $repoName . '-' . (string) $prop->getValue($subject); |
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} |
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} |
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PeekAndPoke /
slumber-data
