Auto loading/instantiating of servlet in web server

[Nischal Topno]

Hi,

Is there any way to auto load/instantiate a new class of a servlet
into the JVM (with shutting the web server) after replacing the old
class with new one?

For e.g., after a servlet is deployed and loaded in the web server, a
change needs to made to this server. Without shutting down the web
server, can this new class with changes be loaded/instantiated. Is
there any specific code that needs to be written in the servlet for
this to happen.

Nischal

[Karthik A.]

Hi,
From what i have seen 'no'.
From what I have seen none of the available allow hot deployment of a
servlet ... however the JSP pages are hot deployable.

tn******@yahoo.com (Nischal Topno) wrote in message news:<5a**************************@posting.google. com>...

Hi,

Is there any way to auto load/instantiate a new class of a servlet
into the JVM (with shutting the web server) after replacing the old
class with new one?

For e.g., after a servlet is deployed and loaded in the web server, a
change needs to made to this server. Without shutting down the web
server, can this new class with changes be loaded/instantiated. Is
there any specific code that needs to be written in the servlet for
this to happen.

Nischal

[Karthik A.]

That is exactly what i ment .... what the manager does is .. it
restarts the servlet engine after the new servlet is deployed ...
Chris <ch*******@hotmail.com> wrote in message news:<1W*********************@news0.telusplanet.ne t>...

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Nischal Topno wrote:

Hi,

Is there any way to auto load/instantiate a new class of a servlet
into the JVM (with shutting the web server) after replacing the old
class with new one?

For e.g., after a servlet is deployed and loaded in the web server,
a change needs to made to this server. Without shutting down the web
server, can this new class with changes be loaded/instantiated. Is
there any specific code that needs to be written in the servlet for
this to happen.

Nischal

I think I did this a while ago, and I'm not sure if it worked. I think
it does though. The Tomcat server seems to allow this to happen via
the manager application. The following is for version 4.1 from the
documentation on the Apache site:
http://jakarta.apache.org/tomcat/tom...ger-howto.html
Go there, then click on Reload An Existing Application.
Specifically, read this:
"Signal an existing application to shut itself down and reload. This
can be useful when the web application context is not reloadable and
you have updated classes or property files in the /WEB-INF/classes
directory or when you have added or updated jar files in the
/WEB-INF/lib directory."

- --
Chris
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