Re: [Quickfix-developers] Changing SenderCompID

[Oren M. <or...@qu...>]

Yeah, I've seen the CME's naughty behavior of using multiple SenderCompID's 
on a single session.  QuickFIX has safety precautions in place that ensures 
any message send out always has the correct SenderCompID, TargetCompID and 
BeginString.  If you want to disable this you will have to change change the 
Session::fill( Header ) method to do a something like this:

if( !header.isSetField( FIELD::SenderCompID ) )
    header.setField( m_sessionID.getSenderCompID() )

You will then need to make sure you use the SessionID to lookup your 
session, as your message will not have complete information to identify the 
correct session.

This is a *really* specialized case, and I'm not sure the best way to add 
general support for something like this.  I think many people rely on the 
current behavior for multiplexing which is really convenient to not have to 
worry about session ID's when routing your messages.  This may just require 
another sendToTarget signature which allows you to override the sessionID.

--oren

----- Original Message ----- 
From: "Shane Ryan" <Sr...@ty...>
To: "Caleb Epstein" <cal...@gm...>
Cc: "Oren Miller" <or...@qu...>; "James Wiggs" 
<wi...@wi...>; <qui...@li...>
Sent: Tuesday, March 29, 2005 10:41 AM
Subject: RE: [Quickfix-developers] Changing SenderCompID


No

From the CME's perspective the SenderCompID works like this: chars 1-3
are a session ID, chars 4-6, are the FirmID (the clearing house firm id
that is) and char 7 is a single char that is set based on various
conditions (usually P for primary server or B for backup server but
there is a few other cases).

The SenderSubID is for identifying a trader within a firm.

--Shane


-----Original Message-----
From: Caleb Epstein [mailto:cal...@gm...]
Sent: 29 March 2005 16:20
To: Shane Ryan
Cc: Oren Miller; James Wiggs; qui...@li...
Subject: Re: [Quickfix-developers] Changing SenderCompID

On Tue, 29 Mar 2005 17:12:49 +0100, Shane Ryan
<Sr...@ty...> wrote:
> Is there a way to easily change the SenderCompID without starting a
new
> session?
>
> I am doing the ttCert tests and they want me to change the FirmID
which
> for them means changing the fourth, fifth, and sixth characters of the
> SenderCompID.

!?!?!?  Isn't this what SenderSubID is for?

-- 
Caleb Epstein
caleb dot epstein at gmail dot com