{{Quickfixn}} Adding new acceptor session dynamically

[Martin Adams]

Hi

 

Your use case wasn't covered when the dynamic session functionality was
developed: the relevant UT code uses the provided screen logger, while the
relevant proprietary production code used a custom file logger. You,
however, are using the default file logger, and so have come across a
problem that needs fixing.

 

It should be possible also to change the dynamic session code so that the
originally provided default config settings get merged in with the dynamic
session-specific settings, as happens with static sessions.

 

Could you raise an issue for this, and include your comments below in the
description? I'll then endeavour to get this allocated to me for a fix.

 

Martin

From: Quickfixn [mailto:quickfixn-bounces at lists.quickfixn.com] On Behalf Of
Bodey, Jan
Sent: 28 January 2016 16:27
To: Mailing list for QuickFIX/n
Subject: Re: {{Quickfixn}} Adding new acceptor session dynamically

 

Hi

 

I had a look at that - and it does look like it will do exactly what I want.
However, I did notice a couple of issues, the second of which would appear
to make this unusable at the moment:

 

1.       In order to add the new session, I had to supply a full settings
dictionary, ie it did not use any of the defaults supplied when the Acceptor
was originally created.  I was able to get around this but it would be nice
to have the option to just reuse defaults

2.       There was an exception thrown when creating the new Session object.
The problem code is the Create method in FileLogFactory, which is called
from the Session constructor:

 

        public ILog Create(SessionID sessionID)

        {

            return new
FileLog(settings_.Get(sessionID).GetString(SessionSettings.FILE_LOG_PATH),
sessionID);

        }

 

This looks up the session settings from a sessions_ dictionary, however in
the code for the Session constructor, the sessions_ dictionary is not
updated until after the file log creation.  Thus an exception is thrown with
this message: Configuration failed: Session 'FIX.4.2:CME/G->ANEWON1/CMED/GB'
not found

 

This is based on code that I pulled from the head of master, and compiled
and run locally.

 

Many thanks

 

Jan 

 

From: Quickfixn [mailto:quickfixn-bounces at lists.quickfixn.com] On Behalf Of
Martin Adams
Sent: 27 January 2016 20:12
To: 'Mailing list for QuickFIX/n'
Subject: Re: {{Quickfixn}} Adding new acceptor session dynamically

 

Dynamic session capability has been added recently.

 

If you have the current master branch code, take a look the new methods in
IAcceptor and IInitiator interfaces.

 

 

From: Quickfixn [mailto:quickfixn-bounces at lists.quickfixn.com] On Behalf Of
Bodey, Jan
Sent: 27 January 2016 14:40
To: quickfixn at lists.quickfixn.com
Subject: {{Quickfixn}} Adding new acceptor session dynamically

 

Hi

 

What is the recommended approach for adding new acceptor sessions
dynamically?  I would like to be able to set up new sessions while the
application is running.

 

Many thanks

 

Jan

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