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From "J. Ryan Earl" <r...@dynaconnections.com>
Subject RE: Clustering "application scope replication"
Date Fri, 22 Apr 2005 14:44:01 GMT
How does Tomcat know what to serialize?  Does it just use the Reflection
package and serialize out -everything- that implements java.io.Serializable?

-ryan

-----Original Message-----
From: Lionel Farbos [mailto:lionel.farbos@free.fr]
Sent: Friday, April 22, 2005 9:11 AM
To: Tomcat Users List
Cc: joakim.ahlen@kartena.se
Subject: Re: Clustering "application scope replication"


Hi

For your needs, you can use
session replication
(http://jakarta.apache.org/tomcat/tomcat-5.5-doc/cluster-howto.html)
or
your own mechanisms and tables with datas in a database ...
Regards.

On Fri, 22 Apr 2005 15:15:54 +0200
"Joakim Ahlén" <joakim.ahlen@kartena.se> wrote:

> Ok, too bad. Is there any way of storing objects if we want them in
"cluster scope"?
>
> An ugly hack would be to use one single HttpSession with a special
session-id to store global objects, and somehow fetch objects from within
this HttpSession from inside requests that belongs to other sessions. I
can't see how this could be done though, since request.getSession() can't
fetch other sessions than its own. This would probably also have to include
some tomcat specific magic which i wouldn't want.
>
> Any help is appreciated on how to handle this problem!
>
> Thanks
>
> Joakim
>
> On Fri, Apr 22, 2005 at 08:07:21AM -0500, Jess Holle wrote:
> > The servlet spec says this data is local to a given JVM.
> >
> > I suppose a servlet engine could expand beyond the spec, but I'd be
> > surprised if Tomcat did here.
> >
> > Joakim Ahlén wrote:
> >
> > >Hi!
> > >
> > >We have a cluster of two tomcat 5.5.9-machines using session
replication.
> > >However, we also have data in application scope (set with
> > >getServletContext().setAttribute(...)) which as far as i have found in
the
> > >docs, is not replicated.
> > >
> > >Is there any way to accomplish this with tomcat? If not, is there any
plan
> > >to develop support for it? Do other application servers have support
for
> > >this?
> > >
> > >Hope you can help me.
> > >
> > >Regards
> > >
> > >Joakim
> > >
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> >
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>
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