Re: [Quickfix-developers] Order routing best practices?

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

sendToTarget will return false if it is unable to pass the message to
the session for some reason (database failure for instance).  The
session not being logged on is not an error condition since the message
would be potentially resent at the next available time.

You can check to see if the session is logged on by looking up the
session and calling isLoggedOn().  Since FIX is an asynchronous
protocol, you can never be 100% sure that a transaction can/has/will go
through.  Even if you are logged on when the message is sent, if the
sequence numbers are out of sync, there is no way to know when the
counterparty will process the message, if they process it at all.

In any case you can certainly positively identify when a session is not
logged on and re-route appropriately.  You just will not be able to
assume success until the counterparty responds with an ExecutionReport.

--oren

>  What's the  safest/best way to test that a session is logged on and
available?  Does  SendToTarget return an error code if the=20
> target is not available?  Is there a  Session Logon status I can query
prior to calling SendToTarget?  Any suggestions  would be=20
> greatly appreciated.