how to deploy servlet at startup

[Simon Xu]

hi,
I have a servlet DaemonHttpServlet and want to load it during startup tomcat. I am using Socket connect applet and servlet.
I know I should modify web.xml file like
<servlet>
<servlet-name>???</servlet-name> <servlet-class>DaemonHttpServlet</servlet-class><load-on-startup/>
</servlet>
is that correct? but i dont have a servlet name for it?
and also is this web.xml file in Root directory?
When I start tomcat, it gives me "can not load servlet name: DaemonHttpServlet.
Please clarify my confusion,
Thank you very much,
Simon

[Phil Hanna]

You need to assign a servlet name - why do you say you don't have one? Just use DaemonHttpServlet as the name if you don't have any other preference.
The servlet-class element must contain the fully qualified class name. If the class has no package, it is already correct as is.
The class and the web.xml file can be placed in any web application. For example, if you have Tomcat installed at $TOMCAT_HOME, then the files should be
$TOMCAT_HOME/webapps/test/WEB-INF/web.xml
$TOMCAT_HOME/webapps/test/WEB-INF/classes/DaemonHttpServlet.class
where "test" can be any web application under $TOMCAT_HOME/webapps (such as "examples", if you don't want to create a new one).
------------------
Phil Hanna
Author of :
JSP: The Complete Reference
Instant Java Servlets

[Simon Xu]

hi, Phil,
Thanks for your prompt reply.
Can I load an abstract servlet (class)? Thanks,
Simon

[maha anna]

Simon,
A sample web.xml which I tested to auto-load is :

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.// DTD Web Application 1.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<servlet>
         <servlet-name>TestServlet</servlet-name>
         <servlet-class>TestServlet</servlet-class>
         <init-param>
             <param-name>param1</param-name>
             <param-value>value1</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
     </servlet>
</web-app>

We can't auto-load abstract servlet classes since the servlet engine can'e instantiate the servlet and load an 'abstract class' into memory.
regds
maha anna

[Simon Xu]

hi, Maha,
Thanks for your expl.
Simon