[AccessD] Using Global Connctions

Globals work better in VB than in Access IMHO.  But a global connection
object is more than just a global variable, and I don't think there are
really better ways to do that.

Charlotte Foust

-----Original Message-----
From: Drew Wutka [mailto:DWUTKA at marlow.com] 
Sent: Wednesday, March 12, 2003 10:31 AM
To: 'accessd at databaseadvisors.com'
Subject: RE: [AccessD] Using Global Connctions


Love Globals.
They are just as reliable as any other code.
If someone did, it would be me! <VBG>
Sometimes.
Yes, all the time.  I 'hit and release' my ADO Connections all the time,
especially when on a LAN.  In fact, the first vergence from that
practice just happened last night.  I am working on a web interface to a
Contact Request database.  The database is on our Internet Web Server,
and the Web interface is on our Intranet Web Server.  Creating the
connection through the network (from server to server) takes about half
a second to a second (didn't really time it...).  I have multiple
classes working on each page, each of which require db interaction.
Opening and killing the connection creates unacceptable delays (3 to 4
seconds per page load...I know that's not too bad, but in comparison to
almost instantaneous pulls with the method I am using now, there is a
big difference).  So what I did, was take a major 'class', which
represents information about the person logged in (it's used in every
page), and I load an instance of that class, if it hasn't been loaded.
If it has been loaded, I pull the class from a Session variable, which
has already been loaded.  That class keeps the connection open while the
class is live, so I can then pass the connection object to other
classes, keeping it open the entire time.

With that method, the first page on the site (whatever page is hit)
takes a few moments to load, but from that point on, the site runs as
fast as the user can click.  I left the default timeout of 10 minutes on
the session object, so as long as the user doesn't wait more then 10
minutes before doing something on the site, they won't experience the
temporarily delay in the  main class loading.

Drew

-----Original Message-----
From: Mark L. Breen [mailto:subs at solution-providers.ie]
Sent: Wednesday, March 12, 2003 3:35 AM
To: accessd at databaseadvisors.com
Subject: [AccessD] Using Global Connctions


Hello All,

As a follow up to Susan Harkins discussion on the command object,

How do you guys use a global connection in your apps

What I have been doing is initialising gccnn when I load the app.  It is
G lobal C onstant cnn.

I then use this Global variable for every ADO section of code.

Do you hate global variables?
do you think that they are unreliable?
do you think that someone is going to come in the middle of the night
and wipe it out? Do you use a class or property pass it around instead?
In a fat client, LAN, does anyone initialise it and close it each time?
(I presume not)

Just intested in your feedback

Thanks



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