[Quickfix-developers] How to add support for custom messages and custom signature to QuickFix?

[Reiner N. <rei...@ma...>]

Hi,

I need to extend QuickFix to support custom messages. As a first step a new an 
additional data dictionary was created. Now QuickFix must be build again to 
generate the code according the additional data dictionary.
What is the correct way to build QuickFix to support this data dictionary? 


I also need to add a custom defined tag containing a digital signature to a 
FIX message. To do this, I need to retrieve the body in FIX notation of a 
message where almost all fields are populated. After calculating the 
signature the message must be extended with the custom field containing the 
signature and then the message can be sent.

My questions:
How can I retrieve the message body in FIX notation? I do not need the header 
nor the trailer but only the body for the calculation.

What is the best way to add the custom field? 
Using Java, I guess the methods Application.toApp or before calling 
Session.sendToTarget can be used. Is there a recommendation whether to use 
toApp or before calling sendToTarget.

Cheers
Reiner