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From Kevin McBrearty <ke...@atg.ca>
Subject RE: Can I somehow run a java process (application) within the Tomcat java process
Date Mon, 01 May 2000 12:31:02 GMT
Use the LoadOnStrartup when you define your servlet in WEB.XML, something
like this:

    <servlet>
      <servlet-name>Startup</servlet-name>
      <servlet-class>StartupServlet</servlet-class>
      <load-on-startup>10</load-on-startup>
    </servlet>

Kevin McBrearty
ATG Automation Technologies Group Ltd.

> -----Original Message-----
> From: Stefan Freyr Stefansson [mailto:stebbi@decode.is]
> Sent: Monday, May 01, 2000 7:55 AM
> To: tomcat-user@jakarta.apache.org; steve@bonampak.net
> Subject: RE: Can I somehow run a java process (application) within the
> Tomcat java process
>
>
> Thanks... Obvious or not, the first choice sounds exactly what I want.  We
> had considered the other choice and were going to go that way unless
> something better came along.  We didn't think of the first choice however!
> One question though.  If I convert the app to a servlet... how can I make
> sure it starts up when tomcat does?  I mean doesn't somebody have
> to invoke
> the servlet to start it up?  or is there a method (constructor or
> initializer) which is run as soon as tomcat starts?
>
> Thanks a whole bunch for your help!
> Stefan.
>
>
> -----Original Message-----
> From: steve@bonampak.net [mailto:steve@bonampak.net]On Behalf Of Steve
> Weiss
> Sent: 1. mai 2000 02:09
> To: tomcat-user@jakarta.apache.org
> Subject: Re: Can I somehow run a java process (application) within the
> Tomcat java process
>
>
> I could think of two fairly obvious possibilities:
>
> 1) Convert your CORBA application to a servlet (you'd probably want it
> to start up when Tomcat starts). This shouldn't be too difficult and
> you'd have them both running in the same JVM.
>
> 2) Use CORBA to communicate between your JSPs/servlets and the CORBA
> app. You could also use RMI for this, but since your application is
> already CORBA it might be easier to go that way.
>
> -Steve
>
> Stefan Freyr Stefansson wrote:
> >
> > Hi!  Man do I need a quick and positive answer to this one!!! :o/
> >
> > The thing is I'm doing this surveillance system for servers (as in
> > client/server).  It uses CORBA to communicate with the server it's
> > monitoring and receives method invocations from it (things like
> > clientConnected(info), dataPackageSent(info) and so on).
> > We're trying to provide remote administration to it through JSP
> and we've
> > been developing the thing in each corner of the room (we're two who are
> > working on it).  I've been doing the JSP stuff and had pretty
> good success
> > with it and my partner has been doing the CORBA stuff and likewise been
> > pretty successful.
> > Tonight we tried to combine the two and wanted to see if we
> could remotely
> > stop our system from logging information down to the
> database... well.. it
> > didn't work.  It didn't take a long time for us figuring out that the
> reason
> > for this was that Tomcat was running on one java.exe process
> and the CORBA
> > service application (which is just a java app... a class with a main
> > function) was running on another.  This probably means (and I'm guessing
> > here) that they are being run on seperate virtual machines!?!??
> Anyways...
> > that's no good for us since now, the UI part (my JSP) is using a whole
> > different set of class instances than his CORBA things.  Which,
> in return,
> > means that when I shut off "my" database connection... his is still fine
> and
> > dandy!!!  So we see one solution to the problem... have the same process
> > create two threads... one running tomcat and the other running the corba
> > server app.
> > Does anybody know if this is possible???
> >
> > Please help, we're running out of time (this is a school project) and we
> > really need a solution to this problem...  And of course if
> anybody knows
> a
> > better way to solve this... hey I'm all ears!!!
> >
> > Kind regards,
> > Stefan
> >
> >
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> --
> "If you watch TV news, you know less about the world than if you just
> drank
> gin straight from the bottle."  - Garrison Keillor
>
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