src/Zf2Forum/Service/Discuss.php
public function createMessage(MessageInterface $message)
    {
        // Set post time and persist message.
        $message->setUserId($this->getServiceManager()->get('zfcuser_auth_service')->getIdentity()->getId());
        $message->setTimestampCreated(new \DateTime);

        $this->getEventManager()->trigger(
            __FUNCTION__,
            $message,
            array(
                'message' => $message,
            )
        );

        $message = $this->messageMapper->persist($message);

        $this->getEventManager()->trigger(
            __FUNCTION__ . '.post',
            $message,
            array(
                'message' => $message,
            )
        );
        return $message;
    }
public function createMessage(MessageInterface $message)
    {
        // Set post time and persist message.
        $message->setUserId($this->getServiceManager()->get('zfcuser_auth_service')->getIdentity()->getId());
        $message->setTimestampCreated(new \DateTime);

        $this->getEventManager()->trigger(
            __FUNCTION__,
            $message,
            array(
                'message' => $message,
            )
        );

        $message = $this->messageMapper->persist($message);

        $this->getEventManager()->trigger(
            __FUNCTION__ . '.post',
            $message,
            array(
                'message' => $message,
            )
        );
        return $message;
    }
createMessage

@param MessageInterface $message
@return MessageInterface