Re: [Quickfix-developers] FileStore only stores outgoing messages?

[<OM...@th...>]

Well the store and the log have two different purposes.  The store is
designed as a repository for a sessions messages so it can resend them if
requested.  This is why the file format is very efficient for machines, but
not so much for people.  Incoming messages are not stored because they
simply arn't necessary for this purpose, so extra IO overhead is reduced.
This is also temporary storage, as everything will be wiped out as soon as
it is no longer needed.

The log is pretty clearly designed for people to figure out what is going
on internally, and is therfore much nicer for people, and not so good for
machines (funny how it always works out this way).

I guess the question is, how do you plan on querying this information.  If
versatile queries are important to you, then you may want to explore using
the MySQLLog.  The trade off is performance of a database versus flat
files.  On the other hand, using the LIKE command in SQL, your queries can
be sophisticated enough that you can filter on individual fields in the FIX
messages.

Otherwise it would be pretty easy to write a small app that can read in the
incoming message log line by line and create FIX::Message objects.  Then
you can manipulate them however you want.  There are third party utilities
that will actually do this for you.

The other alternative would be to implement your own Log by extending the
interface and storing it in a format that better suits you.

--oren



|---------+----------------------------------------------->
|         |           "Chang Lin" <cl...@gl...>|
|         |           Sent by:                            |
|         |           qui...@li...|
|         |           ceforge.net                         |
|         |                                               |
|         |                                               |
|         |           10/29/2002 05:52 PM                 |
|         |           Please respond to clin              |
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  |       To:       <qui...@li...>                                  |
  |       cc:                                                                                    |
  |       Subject:  [Quickfix-developers] FileStore only stores outgoing messages?               |
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Hi there,





In looking at the source code, I found out that FileStore class only saves
outgoing messages in <.body> file. Is there any reason for not saving
incoming messages other than conflicting MsgSeqNum? I am aware that FileLog
class saves both incoming & outgoing messages, however FileStore class has
a better interface for retrieving saved messages. I guess my question is:
what is the best way to get a snapshot of all the incoming messages? I
would appreciate if somebody helps me out here.





Thanks in advance.





--Chang