I guess this didn't actually answer your question...

The short answer to your question is no. You would have to have your
application manage validating the connection. You could use a TTimer with a
high interval setting.

Jason Wharton

> -----Original Message-----
> From: Jason Wharton [mailto:jwharton@...]
> Sent: Tuesday, November 23, 2004 11:28 PM
> To: IBObjects@yahoogroups.com
> Subject: RE: [IBO] IB_Events question
>
>
>
> Daniel,
>
> My IBS_Base.pas/dfm is a TServiceApp that essentially works
> just like this.
> I really need to develop the documentation on this more than
> I have, but it
> sounds ideal for what you are trying to accomplish.
>
> Essentially, the service app goes to sleep and every so often
> it wakes up
> and checks the connection to the database to see if it is
> still alive. If
> not, then it attempts to deal with it and then goes back to
> sleep if it
> succeeds or fails. When it wakes up it tries to establish or
> verify the
> connection again. I use about a 2 to 10 minute sleep interval.
>
> Of course, if your connection is good and the AST of the
> event is triggered
> then it hits the OnWakeUp event and the service app is jolted
> from its nap
> and it immediately goes to work finding out who woke it up
> and it does its
> thing and goes back to sleep. The service control thread
> also performs a
> wakeup so that it can tidy up and close on a shutdown or stop request.
>
> This service app module is designed to serve as a base class
> with protected
> virtual methods that can be overridden to have the relevant
> functionality
> plugged into them. There is a lot of the groundwork already
> laid, like
> providing the worker thread, logging to a text file is easy,
> sending off an
> email notification (well, I've got some issues here to deal
> with since they
> changed from NM to Indy), and the sleep stuff, etc. is all pretty well
> provided in a framework.
>
> Hope this helps explain to some extent how this works.
>
> Jason Wharton
> www.ibobjects.com
>
>
> > -----Original Message-----
> > From: Daniel Jimenez [mailto:d.jimenez@...]
> > Sent: Tuesday, November 23, 2004 7:56 PM
> > To: IBObjects@yahoogroups.com
> > Subject: [IBO] IB_Events question
> >
> >
> >
> > Hi,
> >
> > I am about to modify an application, so that it will make use
> > of "Events"
> > triggered by the Firebird DB. Thus, I will make use of
> > IB_Events. However, I
> > am concerned about a few things.
> >
> > 1. Is there a component within IBObjects which works as a
> > "WatchDog" that
> > is, we can monitor the connection to the DB, so that if we loose the
> > connection to the Database, the watchdog will see this and
> > reconnect, or
> > trigger an even in the application so that it can reconnect
> > to the DB. The
> > reason for this, is that I would like to have the IB_Events setup as
> > passive.
> >
> > Thanks
> >
> > danieL.