/**
* @param $message
* @param $target
* @return string
* @throws \InvalidArgumentException
*/
public function add($message, $target)
{
if ($this->seqId >= 5000) {
throw new \InvalidArgumentException('Can not add over 5000 message once! Please call submit() first.');
} else {
++$this->seqId;
$innerMsg = new SingleBatchItem();
$innerMsg->setSeqId($this->seqId);
$innerMsg->setData($this->createSingleJson($message, $target));
$this->innerMsgList[] = $innerMsg;
}
return $this->seqId . '';
}
