Re: [Quickfixj-users] Support for UI64 data type

[Philip W. <ph...@wh...>]

You can reset sequence numbers mid-session to avoid this. Maybe QFJ should natively do this automatically when it gets close (say at 2 billion as a nice round number).

Of course resetting means being unable to re-request the previous sessions messages which might be a problem..

If this therefore isn’t an option and you’re reallly exceeding 2 billion for the MsgSeqNum (an average of >3,300 messages per second for a week) you have a problem.

The FIX spec mandates it is an integer so it’s unlikely we’d want to merge a code change to make it as a default. It’d be a breaking change obviously too.

You’ll also have to change more than just that field. Certainly the related fields in Reject, Logon, ResendRequest and SequenceReset will also have to change.

It feels like this is something that should be part of a FIXT2 spec if it’s a practical concern.

If you have a code change for this that you want to submit we can discuss how to limit the API breakage in more detail.

What does QFJ do right now when this happens?

Best,

Philip Whitehouse

> On 7 Aug 2019, at 06:44, Kodippili Arachchige, Asanka <as...@ls...> wrote:
> 
> QuickFIX/J Documentation: http://www.quickfixj.org/documentation/
> QuickFIX/J Support: http://www.quickfixj.org/support/
> 
> 
> Thanks for your responses. To clarify my requirement further, I need to send a ui64 value for the MsgSeqNum field. ( This is due to a system running for several days continuously and the sequence number reaches ui64 values ) . Currently quickfix expects the MsgSeqNum field to be an int. If I send it as a string, an IncorectDataException is thrown. The methods provided by Session class related to sequence number such as getExpectedTargetNum()  and setNextSenderMsgSeqNum also expect the MsgSeqNum field to be an int.
>  
> Could quickfix/J be changed to handle the MsgSeqNum as a long value ?
>  
>  
>  
> Thanks,
> AsankaK
>  
> From: Christoph John [mailto:chr...@ma...] 
> Sent: Monday, August 05, 2019 5:29 PM
> To: qui...@li...; Kodippili Arachchige, Asanka <as...@ls...>; Qui...@li...
> Subject: Re: [Quickfixj-users] Support for UI64 data type
>  
> *** THIS EMAIL ORIGINATED FROM OUTSIDE OF THE ORGANISATION ***
> 
> Use String field? There you can send almost anything. 
> Cheers 
> Chris
> 
> Am 5. August 2019 13:18:19 MESZ schrieb "Kodippili Arachchige, Asanka" <as...@ls...>:
> Does quickfix/J support unsigned long (UI64) values ? Is there any workaround I could use for this with existing FIeldTypes ?
>  
> Thanks,
> Kodippili Arachchige Asanka
> Associate Tech Lead, MillenniumIT
> LSEG Technology
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