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From: "James Cook" <jimcook@iname.com>
To: <tomcat-user@jakarta.apache.org>
References: <24300000001> <39450F8E.6D8B8622@tems.com>
Subject: Re: Servlet Collaboration
Date: Mon, 12 Jun 2000 12:46:43 -0400
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Naga,

You cannot pass objects between servlet contexts. There may be a kludgey way
for you to attempt this, such as a shared file or shared memory, but it is
highly non-portable. You may also be able to serialize the object as a
string from one context to the other, but it would have to take place as a
normal HTTP call.

jim

----- Original Message -----
From: Naga Yerramsetti <naga@tems.com>
To: <tomcat-user@jakarta.apache.org>
Sent: Monday, June 12, 2000 12:27 PM
Subject: Re: Servlet Collaboration


> Thanks for the response. I may not have explained well. My problem is
this.
>
> Consider this
>
> Two servlets running  in different servlet contexts, ServletA in contextA
and servletB in
> contextB.
> in servletA if I have
>
>
> SomeClassA objA = new SomeClassA();
> getServleteContext().setAttribute("attribute1",objA);
>
> and in SevletB can I get handle  to objA using :
>
> SomeClassA aliasObjA = getServletContext.getContext(<<URI for
SevleletA>>);
>
> "Craig R. McClanahan" wrote:
>
> > Naga Yerramsetti wrote:
> >
> > > Is it possible for a servlet to access servlet from another context.
> > >
> >
> > What precisely do you mean by "access"?  If you mean "can I get a
reference to a servlet instance
> > in another context", the answer is no -- you cannot even get a reference
to a servlet instance in
> > your own context.
> >
> > >
> > > We have differenet servlets running different servlet contexts(for
different virtual domains).
> > > We need to have a management servlet that can communicate with all
these servlets
> > >
> >
> > What you can do is use the java.net.URLConnection class (or it's
subclass,
> > java.net.HttpURLConnection) to make a request from one servlet to
another, and then process the
> > response.  The details are in the JDK javadocs for these classes.  There
are also examples of
> > using them in the Java Language Tutorial's networking trail
> > <http://java.sun.com/docs/books/tutorial>.
> >
> > Craig McClanahan
> >
>
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