/**
* Add the task to the list.
*
* @param string $type The type name.
*
* @param JsonArray|null $metaData The (optional) meta data.
*
* @return string
*
* @throws \InvalidArgumentException When no task instance can be created from the meta data.
*/
public function queue($type, JsonArray $metaData = null)
{
$taskId = $this->generateId();
if (null === $metaData) {
$metaData = new JsonArray();
}
$metaData->set(Task::SETTING_ID, $taskId)->set(Task::SETTING_TYPE, $type)->set('status', Task::STATE_PENDING)->set(Task::SETTING_CREATED_AT, date('c'));
$taskFile = new JsonFile($this->taskIdToFileName($taskId), null);
$taskFile->setData($metaData->getData());
$taskFile->save();
if (!$this->createTaskFromMetaData($taskFile)) {
unlink($taskFile->getFilename());
throw new \InvalidArgumentException('Could not create task of type "' . $metaData->get('type') . '"');
}
$this->getConfig()->set($taskId, $metaData->getData());
return $taskId;
}
