private function readSnapshotEventEntry()
{
$snapshotEventReader = new FilesystemEventMessageReader($this->snapshotEventFile, $this->eventSerializer);
$bytesToSkip = $this->readLong($this->snapshotEventFile);
$snapshotEvent = $snapshotEventReader->readEventMessage();
if (null === $bytesToSkip && null === $snapshotEvent) {
return array();
}
return array('snapshotEvent' => $snapshotEvent, 'bytesToSkip' => $bytesToSkip);
}
/**
* Calculate the bytes to skip when reading the event file.
*
* @param DomainEventMessageInterface $snapshotEvent the snapshot event
* @return integer the bytes to skip when reading the event file
*
* @throws \Exception
*/
private function calculateOffset(DomainEventMessageInterface $snapshotEvent)
{
try {
$eventMessageReader = new FilesystemEventMessageReader($this->eventFile, $this->eventSerializer);
$lastReadSequenceNumber = -1;
while ($lastReadSequenceNumber < $snapshotEvent->getScn()) {
$entry = $eventMessageReader->readEventMessage();
$lastReadSequenceNumber = $entry->getScn();
}
return $this->eventFile->ftell();
} catch (\Exception $ex) {
throw $ex;
}
}