Re: RE.. [Quickfix-developers] Logon Message ?

[Oren M. <ore...@ya...>]

Well, sharing anything between callbacks shouldn't be
a problem.  All the callbacks exist in your derived
class, so if you want to share a resource just make it
a member of your class.  If you want to share
resources between your application and your message
cracker, inheriting it as a mixin works well.

Also, remember to synchronize your resources.  onRun
runs in a separate thread.  If you are using the
Threaded model, each session will also have it's own
thread meaning callbacks can be called by multiple
threads as well.

As I told john, for now you can manually add methods
to the cracker for any missing messages like Logon. 
The problem doesn't reside in the data dictionary, but
in the generation scripts.

The code generator is being rewritten because we are
already pushing xslt to the boundries of what it can
do.

--- Vamsi Krishna <Vam...@ib...> wrote:
> Hi
> I have a situation , where ( can be sequel to John
> Dahl's requirement),
> I need to connect to a database when my login is
> successful.
> 
> 	Thereafter I need to share this connection handle
> across the
> other 	functions (onRun and onMessage). I have the
> following questions
> regarding the above situation. Otherwise I would end
> up having a number
> of connection handles for each of the functions(
> callbacks)
> 
> 	a) Can I use onRun to periodically generate
> MarketDataRequest
> from the list in the table ( database),( ofcourse it
> will have where
> clause saying if the certain flag is "send" or some
> thing like that.
> 
> 
> There were questions earlier of collection classes,
> Here is the classic
> example,
> 
> I need to send a marketdatarequest with certain
> symbols ( "chose 'CS'
> type for simplicity). I would like to use onRun to
> look into database,
> get the symbols and compose the message and send it
> across.
> 
> Now I get a message back ( marketDataSnapshot) with
> Symbol "A" having
> bidprice "12.2".
> 
> Before sending I put the symbol in collection class
> and after I receive
> the response ( onMessage),would try to match the
> symbol and fill up the
> prices corresponding to the symbol. Thereafter I
> will have to update the
> information to the database.
> 
> My question is How do  we share the collection
> classes.. across
> callbacks and how do we share the
> connectionhandles..?
> 
> It would be nice if the onMessage for admin messages
> are incorporated.
> 
> 
> I guess do we need to update the dictionary for
> that..?
> 
> Vamsi
> 
> 
> /-----Original Message-----
> /From:
> qui...@li...
> [mailto:quickfix-
> /dev...@li...] On Behalf
> Of Oren Miller
> /Sent: Monday, June 02, 2003 2:50 AM
> /To: Jon Dahl;
> qui...@li...
> /Subject: Re: [Quickfix-developers] Logon Message ?
> /
> /Yeah, virtual functions for administrative messages
> /haven't been generated.  This is an oversight that
> /will be fixed shortly.
> /
> /If you just add the virtual method for Logon into
> the
> /MessageCracker header file, that should be all you
> /need to do.
> /
> /What you can do is overload the onMessage( const D
> /--- Jon Dahl <jd...@Li...> wrote:
> /> There is something I don't understand with the
> logon
> /> sequence.
> />
> /> If I want to use the Message Cracker function in
> the
> /> fromAdmin function, there is no virtual function
> /> defined in the message cracker header file.
> However,
> /> the crack function checks for message type "A"
> and
> /> calls
> /> onMessage((Logon&)message, sessionID). The result
> is
> /> UnsupportedMessageType being thrown.
> />
> /> Is this a bug in the library or was it done this
> way
> /> buy design? What do I have to do to get the
> /> onMessage to work?
> />
> /> Thanks,
> />
> /> JD
> />
> />
> />
>
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