Method queEvents

src/jrd/jrd.cpp:3860–3908

JEvents* JAttachment::queEvents(CheckStatusWrapper* user_status, IEventCallback* callback,
	unsigned int length, const unsigned char* events)
{
/**************************************
 *
 *	g d s _ $ q u e _ e v e n t s
 *
 **************************************
 *
 * Functional description
 *	Que a request for event notification.
 *
 **************************************/
	JEvents* ev = NULL;

	try
	{
		EngineContextHolder tdbb(user_status, this, FB_FUNCTION);
		check_database(tdbb);

		try
		{
			Database* const dbb = tdbb->getDatabase();
			Attachment* const attachment = getHandle();

			EventManager::init(attachment);

			const int id = dbb->eventManager()->queEvents(attachment->att_event_session,
														  length, events, callback);

			ev = FB_NEW JEvents(id, getStable(), callback);
			ev->addRef();
		}
		catch (const Exception& ex)
		{
			transliterateException(tdbb, ex, user_status, "JAttachment::queEvents");
			return ev;
		}
	}
	catch (const Exception& ex)
	{
		ex.stuffException(user_status);
		return ev;
	}

	successful_completion(user_status);

	return ev;
}


void JRequest::receive(CheckStatusWrapper* user_status, int level, unsigned int msg_type,