Re: [Quickfix-developers] Problem with VB.NET
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Re: [Quickfix-developers] Problem with VB.NET
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From: Oren M. <or...@qu...> - 2004-06-04 18:02:15
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Ramprakash,
The onLogoff and onLogon callbacks give you a sessionID. What I=20
usually do is keep a hash and add the sessionID in the onLogon call,=20
and remove it in the onLogoff call.
Alternatively you can call the static lookupSession method on the=20
session class, and call isLoggedOn on the resulting Session object. =20
This way you can rely on QF to keep track of who is logged on for you.
There isn't really anything special you need to do to handle an=20
application breakdown. QuickFIX will send you any messages that you=20
hadn't processed in the time you went down to when you come back up. =20
This should be transparent to you. One thing I would recommend for=20
high speed lines, is to send out a TestRequest message, and only begin=20=
sending new messages when you get a response.
In addition to taking a filename, the sessionsettings class can take=20
any stream in its constructor. So you can create a MemoryStream and=20
pass it in. Just make sure the contents of the stream are in the same=20=
format as a configuration file.
--oren
On Jun 4, 2004, at 3:12 AM, Ramprakash Umapathy wrote:
> Hi Oren,
> =A0
> The FIX works fine and thanks.
> =A0
> I looking=A0for the code snippets to do the following,
> =A0
> 1. How to check for a particular session user=A0is already logged on =
or=20
> the connection is alive? ( I see a method isLoggedOn in Acceptor and=20=
> Initiator classes but not sure how to use in my VB code)
> =A0
> 2. How to handle a situation in case of application breakdown (with=20
> some code sample?!) ?
> =A0
> 3. How can I pass the parameters for SessionSettings from own=20
> customized application (not by using configuration files (*.cfg or=20
> whatsoever)?
> =A0
> TIA,
> Ramprakash
> =A0
> =A0
> P.S : The sender is a newbie (to both QuickFix and :NET Technologies)=20=
> and prefers to have code samples in VB.NET / C#
> =A0
> =A0
> -----Original Message-----
> From: qui...@li...=20
> [mailto:qui...@li...] On Behalf Of=20=
> or...@qu...
> Sent: luned=EC 31 maggio 2004 19:53
> To: Ramprakash Umapathy
> Cc: qui...@li...; sa...@uc...
> Subject: RE: [Quickfix-developers] Problem with VB.NET
>
> Ok, I've fixed this and was able to run your sample application with=20=
> no problem.=A0 It appears that VB.NET got confused about const =
pointers=20
> that were declared in MC++.=A0 I've attached a new=20
> quickfix/src/.NET/Application.h file.=A0If you replace the one you =
have=20
> with this one you should be all set.=A0 I'll check this into CVS and =
it=20
> will be in the next release as well.
> Sam, I CC'd you on this because while researching this I noticed you=20=
> posted the same problem earlier to the mailing list.=A0 Don't know if =
it=20
> is still of interest to you but here is the fix.
> =A0
> --oren
>
> -------- Original Message --------
> Subject: [Quickfix-developers] Problem with VB.NET
> From: "Ramprakash Umapathy" <ram...@ca...>
> Date: Mon, May 24, 2004 5:43 am
> To: qui...@li...
>
> Hi All,
>
> I'm a newbie trying to use QuickFix in VB.NET
>
> I ran into problems with my code here. Could anyone of help me to=20
> solve. I
> have seen a similar post with no answers. I use like this in my VB.NET=20=
> code,
>
>
> Imports QuickFix
> Public Class QFapp
> =A0 =A0Inherits QuickFix.MessageCracker
> =A0 =A0Implements QuickFix.Application
>
> =A0 =A0Public Sub toApp(ByVal msg As QuickFix.Message, ByVal sid As
> QuickFix.SessionID) Implements QuickFix.Application.toApp
> =A0 =A0End Sub
>
> =A0 =A0Public Sub fromAdmin(ByVal msg As QuickFix.Message, ByVal sid =
As
> QuickFix.SessionID) Implements QuickFix.Application.fromAdmin
> =A0 =A0End Sub
>
> =A0 =A0Public Sub onCreate(ByVal sid As QuickFix.SessionID) Implements
> QuickFix.Application.onCreate
> =A0 =A0End Sub
>
> =A0 =A0Public Sub onLogon(ByVal sid As QuickFix.SessionID) Implements
> QuickFix.Application.onLogon
> =A0 =A0End Sub
>
> =A0 =A0Public Sub onLogout(ByVal sid As QuickFix.SessionID) Implements
> QuickFix.Application.onLogout
> =A0 =A0End Sub
>
> =A0 =A0Public Sub toAdmin(ByVal msg As QuickFix.Message, ByVal sid As
> QuickFix.SessionID) Implements QuickFix.Application.toAdmin
> =A0 =A0End Sub
>
> =A0 =A0Public Sub fromApp(ByVal msg As QuickFix.Message, ByVal sid As
> QuickFix.SessionID) Implements QuickFix.Application.fromApp
> =A0 =A0End Sub
>
> End Class
>
> And then I call like this,
>
> Imports QuickFix
>
> Module Module1
>
> =A0 =A0Sub Main()
>
> =A0 =A0 =A0 =A0Try
>
> =A0 =A0 =A0 =A0 =A0 =A0'Get Setting from ini file
> =A0 =A0 =A0 =A0 =A0 =A0Dim ss As New SessionSettings("c:\client.ini")
> =A0 =A0 =A0 =A0 =A0 =A0Dim sInit As SocketInitiator
> =A0 =A0 =A0 =A0 =A0 =A0Dim sapp As New QFapp
>
> =A0 =A0 =A0 =A0 =A0 =A0Dim storeFactory As New FileStoreFactory(ss)
> =A0 =A0 =A0 =A0 =A0 =A0Dim logFactory As New =
FileLogFactory("c:\test.log")
> =A0 =A0 =A0 =A0 =A0 =A0Dim msgFactory As New DefaultMessageFactory
>
>
> =A0 =A0 =A0 =A0 =A0 =A0'Initiator Section
> =A0 =A0 =A0 =A0 =A0 =A0sInit =3D New SocketInitiator(sapp, =
storeFactory, ss,=20
> msgFactory)
> =A0 =A0 =A0 =A0 =A0 =A0'sInit =3D New SocketAcceptor(sapp, =
storeFactory, ss,=20
> logFactory,
> msgFactory)
>
> =A0 =A0 =A0 =A0 =A0 =A0sInit.start()
>
> =A0 =A0 =A0 =A0 =A0 =A0sInit.stop()
>
>
>
>
>
> =A0 =A0 =A0 =A0Catch ex As System.Exception
>
> =A0 =A0 =A0 =A0 =A0 =A0Trace.WriteLine(ex.Message)
> =A0 =A0 =A0 =A0 =A0 =A0Trace.WriteLine(ex.StackTrace)
>
> =A0 =A0 =A0 =A0End Try
>
> =A0 =A0End Sub
>
> End Module
>
>
> The System throws an Error (doesn't even caught in Catch Block) with=20=
> the
> following message,
>
>
> An unhandled exception of type 'System.TypeLoadException' occurred in
> Unknown Module.
>
> Additional information: Signature of the body and declaration in a=20
> method
> implementation do not match. =A0Type: TestFixEngine.QFapp. =A0Assembly:
> TestFixEngine, Version=3D1.0.1605.20104, Culture=3Dneutral,=20
> PublicKeyToken=3Dnull.
>
> TIA,
>
> Holy
>
>
> P.S: I could be helpful in anyone of you point out the QuickFix VB.NET
> Resources
>
>
>
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