Registering servlets

[danglingpointers]

I have had Tomcat 4.1 up and running on my linux box for some time and now I am giving Tomcat 5.5 a try on windows and I seem to be missing some nuance.

I have a standard servlet program for which I have created the following directory structure under %CATALINA_HOME%\webapps\myProject\WEB-INF\classes:

\controllers
\utils
\daos

I reference one of my controllers in a jsp as /servlet/controllers.myServlet. But I got a 404. So I tried registering the servlets in my own web.xml file (located in %CATALINA_HOME%\webapps\myProject\WEB-INF).

Thus far I have the following

<servlet>
  <servlet-name>myServlet</servlet>
  <servlet-class>controllers.myServlet</servlet-class>
	<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
   <servlet-name>myServlet</servlet>
   <url-pattern>/servlet/controllers.myServlet</url-pattern>
</servlet-mapping>

But still I get a 404. There must be some minute detail that I am not seeing here.

All help is greatly appreciated.

 

[sedj]

Try :

<servlet>
  <servlet-name>myServlet</servlet>
  <servlet-class>controllers.myServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
   <servlet-name>myServlet</servlet>
   <url-pattern>/servlet/myServlet</url-pattern>
</servlet-mapping>

And access via

http://server:port/myProject/servlet/myServlet

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[danglingpointers]

After making your suggested modifications, I ran into the other problem which I forgot to mention in my initial post. Whenever I add a servlet-mapping definition, I can no longer access "

http://www.myhost:port/myProject".

If I remove the servlet definition, then I can access "

http://www.myhost:port/myProject",

but I cannot access "

http://www.myhost:port/myProject/myServlet".

 

[sedj]

Try adding a welcome file :

<welcome-file-list>
<welcome-file>home.jsp</welcome-file>
<welcome-file>home.html</welcome-file>
</welcome-file-list>

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[danglingpointers]

I am using the default web.xml file from %CATALINA_HOME%\conf that I have copied into %CATALINA_HOME%\webapps\myProject\WEB-INF\ so that all of the <welcome-file-list> entries are the default ones. I also have an index.html file located in
%CATALINA_HOME%\webapps\myProject.

Moreover, whenever I try to access the index file directly through

http://host:port/myProject/index.html

I get a 404. If I turn off the <servlet>myServlet</servlet> tags, then I can access the index file both directly and through

http://.../myProject.

But then I cannot access

http://.../myProject/servlet/*.

I also tried turning on the invoker servlet (I uncommented both the <servlet>invoker</servlet> and the <servlet-mapping>invoker</servlet-mapping> tags in my web.xml) but still the problem exists.

Tomcat seems to be having issues resolving anything but the root directory whenever I turn on a <servlet> tag besides the <servlet>default</servlet>.

 

[sedj]

>>>> I try to access the index file directly through

http://host:port/myProject/index.html

I get a 404.

Have you actually got an index.html file ?

Perhaps you had better post your web.xml file

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[danglingpointers]

Have you actually got an index.html file ?

Yes, I had listed its location in my previous post (%CATALINA_HOME%\webapps\myProject\index.html).

Here is my web.xml that I have running in %CATALINA_HOME%\conf. Another interesting behavior is that whenever I add a web.xml file to %CATALINA_HOME%\webapps\myProject\WEB-INF, I can no longer access

http://.../myProject

even though I could before when the web.xml file was in the %CATALINA_HOME%\conf directory.



<!-- ================== Built In Servlet Definitions ==================== -->


<servlet>
<servlet-name>default</servlet-name>
<servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>



<servlet>
<servlet-name>invoker</servlet-name>
<servlet-class>
org.apache.catalina.servlets.InvokerServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>





<servlet>
<servlet-name>jsp</servlet-name>
<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
<init-param>
<param-name>fork</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>xpoweredBy</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>3</load-on-startup>
</servlet>




<!--
<servlet>
<servlet-name>ssi</servlet-name>
<servlet-class>
org.apache.catalina.ssi.SSIServlet
</servlet-class>
<init-param>
<param-name>buffered</param-name>
<param-value>1</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>expires</param-name>
<param-value>666</param-value>
</init-param>
<init-param>
<param-name>isVirtualWebappRelative</param-name>
<param-value>0</param-value>
</init-param>
<load-on-startup>4</load-on-startup>
</servlet>
-->


<!--
<servlet>
<servlet-name>cgi</servlet-name>
<servlet-class>org.apache.catalina.servlets.CGIServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>cgiPathPrefix</param-name>
<param-value>WEB-INF/cgi</param-value>
</init-param>
<load-on-startup>5</load-on-startup>
</servlet>
-->

<!------ USER-DEFINED SERVLETS ---------------->

<servlet>
<servlet-name>eventsController</servlet>
<servlet-class>controllers.eventsController</servlet-class>
<load-on-startup>4</load-on-startup>
</servlet>

<!-- ================ Built In Servlet Mappings ========================= -->


<!-- The servlet mappings for the built in servlets defined above. Note -->
<!-- that, by default, the CGI and SSI servlets are *not* mapped. You -->
<!-- must uncomment these mappings (or add them to your application's own -->
<!-- web.xml deployment descriptor) to enable these services -->

<!-- The mapping for the default servlet -->

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>eventsController</servlet>
<url-pattern>/servlet/eventsController</url-pattern>
</servlet-mapping>

<!-- The mapping for the invoker servlet -->


<servlet-mapping>
<servlet-name>invoker</servlet-name>
<url-pattern>/servlet/*</url-pattern>
</servlet-mapping>


<!-- The mapping for the JSP servlet -->
<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>*.jspx</url-pattern>
</servlet-mapping>

<!-- The mapping for the SSI servlet -->
<!--
<servlet-mapping>
<servlet-name>ssi</servlet-name>
<url-pattern>*.shtml</url-pattern>
</servlet-mapping>
-->

<!-- The mapping for the CGI Gateway servlet -->

<!--
<servlet-mapping>
<servlet-name>cgi</servlet-name>
<url-pattern>/cgi-bin/*</url-pattern>
</servlet-mapping>
-->

<!-- leaving out the mime definitions -->


<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

</web-app>

I have removed the comment sections to reduce the size.

 

[sedj]

Wow ! Thats a crazy web.xml.

1) Leave the TOMCAT_HOME/conf/web.xml alone - never touch it.

2) Your own webapp should define its own web.xml - which is NOT copied from conf !

I really don't think you need anything more than :

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "file:///usr/tomcat/web-app_2_2.dtd">

<web-app>
	<servlet>
	  <servlet-name>myServlet</servlet>
	  <servlet-class>controllers.myServlet</servlet-class>
	    <load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
	   <servlet-name>myServlet</servlet>
	   <url-pattern>/servlet/myServlet</url-pattern>
	</servlet-mapping>
	
	
	<welcome-file-list> 
		<welcome-file>somedefaultpage.jsp</welcome-file> 
	</welcome-file-list> 	
</web-app>

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[danglingpointers]

Ok, I uninstalled/reinstalled Tomcat 5.5.17, dumped the contents of my %CATALINA_HOME%\webapps\myProject directory and started fresh.

I added the ..\webapps\myProject contents to the new installation and then started the server and tested it. Again, when I navigate to

http://host:port/myProject,

Tomcat will open my index.html file but it will not access the controllers (gives me a 404 for /myProject/servlet/myServlet). So I created the above web.xml file and added it to the %CATALINA_HOME%\webapps\myProject\WEB-INF directory. I changed the necessary values to contain my servlet's name and the default welcome-page. Now Tomcat does not recognize

http://host:port/myProject

or even

http://host:port/myProject/index.html

(it gives me a 404 on both).


My directory structure for the %CATALINA_HOME%\webapps\myProject is as follows:

\myProject -- contains .html,.jsp,.css
\myProject\WEB-INF\ -- contains \classes and web.xml
\myProject\WEB-INF\classes
-- contains \controllers, \dao, \utils
-- the respective subdirectories all contain the appropriate class files which have been defined in a package structure which is reflected by the directory structure.

I cannot think of anything else that I am doing that would possibly cause such a problem.

 

[danglingpointers]

I should make mention that it is only the controller servlets that are the problem. I have a jsp which accesses one of the \myProject\WEB-INF\classes\dao files and it works fine. So I have java and database connectivity, but I am unable to call the \myProject\WEB-INF\classes\controllers servlets.

 

[danglingpointers]

After many arduous hours, I discovered that there was a typo in my web.xml file. The servlet-mapping tag had been improperly terminated and was throwing an error. After fixing the problem, all is working well.

Many thanks for your assistance.