Servlet not showing up in Browser

[Joseph Smithern]

I am trying to create my first web app servlet working in a folder I created.

In the past my servlets worked in the tomcat 5.5 examples directory:
C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\servlets-examples\WEB-INF\classes

I have a file in here called HelloWorlda.java and it compiled and showed on my local web browser.

I also edited the web.xml in the WEB-INF as shown:

   <servlet>
        <servlet-name>HelloWorlda</servlet-name>
        <servlet-class>HelloWorlda</servlet-class>
    </servlet>
 
 
 <servlet-mapping>
        <servlet-name>HelloWorlda</servlet-name>
        <url-pattern>/servlet/HelloWorlda</url-pattern>
    </servlet-mapping>
 

Now I want to create my own directory path:
C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\jones\WEB-INF\classes\email5
I compiled my new EmailServlet.java from the jones\WEB-INF\classes directory:
javac email5\EmailServlet.java and it compiled.

I copied the web.xml from the servel-examples\WEB-INF directory and edited it as such:

 <servlet>
        <servlet-name>email5.EmailServlet</servlet-name>
        <servlet-class>email5.EmailServlet</servlet-class>
    </servlet>
 
<servlet-mapping>
        <servlet-name>email5.EmailServlet</servlet-name>
        <url-pattern>/servlet/email5/EmailServlet</url-pattern>
    </servlet-mapping>

After I put in the url in browser:
http://127.0.0.1:8080/jones/servlet/email5/EmailServlet

I get error:
The requested resource (/jones/servlet/email5/EmailServlet) is not available.

Please advise.

[ July 19, 2006: Message edited by: Joseph Smithern ]
[ July 19, 2006: Message edited by: Joseph Smithern ]

[Naseem Khan]

You need to map your project path with certain name. In this case by jones as you are using localhost:8080/jones/

open your server.xml and add Context tag within the <Host> tag.

<Host....>
<Context path="/jones" 
         docBase="C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\jones" 
         reloadable="true" debug="0"/>
</Host>

Start sever and open your request uri.

Naseem
[ July 19, 2006: Message edited by: Naseem Khan ]

[Joseph Smithern]

Thanks I tried as you suggested and still get same "cannot find server" message.

I added this to server.xml:

    <Host name="localhost" appBase="webapps"
       unpackWARs="true" autoDeploy="true"
       xmlValidation="false" xmlNamespaceAware="false">
 
       <Context path="/jones" docBase="C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\jones" reloadable="true" debug="0"/>
  
....   

Here is my url that I tried:
http://127.0.0.1:8080/jones/servlet/email5.EmailServlet


My web.xml in C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\jones\WEB-INF:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
  Copyright 2004 The Apache Software Foundation
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
 
      <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank" rel="nofollow">http://www.apache.org/licenses/LICENSE-2.0</a>
 
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
 
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">
 
<web-app>
 
    <display-name>Servlet 2.4 Examples</display-name>
    <description>
      Servlet 2.4 Examples.
    </description>
 
    <!-- Define servlet-mapped and path-mapped example filters -->
    <filter>
        <filter-name>Servlet Mapped Filter</filter-name>
        <filter-class>filters.ExampleFilter</filter-class>
<init-param>
    <param-name>attribute</param-name>
    <param-value>filters.ExampleFilter.SERVLET_MAPPED</param-value>
</init-param>
    </filter>
    <filter>
        <filter-name>Path Mapped Filter</filter-name>
        <filter-class>filters.ExampleFilter</filter-class>
<init-param>
    <param-name>attribute</param-name>
    <param-value>filters.ExampleFilter.PATH_MAPPED</param-value>
</init-param>
    </filter>
    <filter>
        <filter-name>Request Dumper Filter</filter-name>
        <filter-class>filters.RequestDumperFilter</filter-class>
    </filter>
 
    <!-- Example filter to set character encoding on each request -->
    <filter>
        <filter-name>Set Character Encoding</filter-name>
        <filter-class>filters.SetCharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>EUC_JP</param-value>
        </init-param>
    </filter>
 
    <filter>
        <filter-name>Compression Filter</filter-name>
        <filter-class>compressionFilters.CompressionFilter</filter-class>
 
        <init-param>
          <param-name>compressionThreshold</param-name>
          <param-value>10</param-value>
        </init-param>
        <init-param>
          <param-name>debug</param-name>
          <param-value>0</param-value>
        </init-param>
    </filter>
 
    <!-- Define filter mappings for the defined filters -->
    <filter-mapping>
        <filter-name>Servlet Mapped Filter</filter-name>
<servlet-name>invoker</servlet-name>
    </filter-mapping>
    <filter-mapping>
        <filter-name>Path Mapped Filter</filter-name>
<url-pattern>/servlet/*</url-pattern>
    </filter-mapping>
 
 
<!-- Example filter mapping to apply the "Set Character Encoding" filter
     to *all* requests processed by this web application -->
<!--
    <filter-mapping>
        <filter-name>Set Character Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
-->
 
<!--
    <filter-mapping>
      <filter-name>Compression Filter</filter-name>
      <url-pattern>/CompressionTest</url-pattern>
    </filter-mapping>
-->
 
<!--
    <filter-mapping>
        <filter-name>Request Dumper Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
-->
 
    <!-- Define example application events listeners -->
    <listener>
        <listener-class>listeners.ContextListener</listener-class>
    </listener>
    <listener>
        <listener-class>listeners.SessionListener</listener-class>
    </listener>
 
    <!-- Define servlets that are included in the example application -->
 
    <servlet>
        <servlet-name>CompressionFilterTestServlet</servlet-name>
        <servlet-class>compressionFilters.CompressionFilterTestServlet</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>HelloWorldExample</servlet-name>
        <servlet-class>HelloWorldExample</servlet-class>
    </servlet>
 
   <servlet>
        <servlet-name>HelloWorlda</servlet-name>
        <servlet-class>HelloWorlda</servlet-class>
    </servlet>
 
<servlet>        
<servlet-name>email5.EmailServlet</servlet-name>        
<servlet-class>email5.EmailServlet</servlet-class>    
</servlet>
 
 
 
 
    <servlet>
        <servlet-name>RequestInfoExample</servlet-name>
        <servlet-class>RequestInfoExample</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>RequestHeaderExample</servlet-name>
        <servlet-class>RequestHeaderExample</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>RequestParamExample</servlet-name>
        <servlet-class>RequestParamExample</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>CookieExample</servlet-name>
        <servlet-class>CookieExample</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>SessionExample</servlet-name>
        <servlet-class>SessionExample</servlet-class>
    </servlet>
 
    <servlet-mapping>
        <servlet-name>CompressionFilterTestServlet</servlet-name>
        <url-pattern>/CompressionTest</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>HelloWorldExample</servlet-name>
        <url-pattern>/servlet/HelloWorldExample</url-pattern>
    </servlet-mapping>
 
    <servlet-mapping>
        <servlet-name>HelloWorlda</servlet-name>
        <url-pattern>/servlet/HelloWorlda</url-pattern>
    </servlet-mapping>
 
 
<servlet-mapping>
<servlet-name>email5.EmailServlet</servlet-name>        
<url-pattern>/servlet/email5/EmailServlet</url-pattern>    
</servlet-mapping>
 
    <servlet-mapping>
        <servlet-name>RequestInfoExample</servlet-name>
        <url-pattern>/servlet/RequestInfoExample/*</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>RequestHeaderExample</servlet-name>
        <url-pattern>/servlet/RequestHeaderExample</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>RequestParamExample</servlet-name>
        <url-pattern>/servlet/RequestParamExample</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>CookieExample</servlet-name>
        <url-pattern>/servlet/CookieExample</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>SessionExample</servlet-name>
        <url-pattern>/servlet/SessionExample</url-pattern>
    </servlet-mapping>
 
    <security-constraint>
      <display-name>Example Security Constraint</display-name>
      <web-resource-collection>
         <web-resource-name>Protected Area</web-resource-name>
 <!-- Define the context-relative URL(s) to be protected -->
         <url-pattern>/jsp/security/protected/*</url-pattern>
 <!-- If you list http methods, only those methods are protected -->
 <http-method>DELETE</http-method>
         <http-method>GET</http-method>
         <http-method>POST</http-method>
 <http-method>PUT</http-method>
      </web-resource-collection>
      <auth-constraint>
         <!-- Anyone with one of the listed roles may access this area -->
         <role-name>tomcat</role-name>
 <role-name>role1</role-name>
      </auth-constraint>
    </security-constraint>
 
    <!-- Default login configuration uses form-based authentication -->
    <login-config>
      <auth-method>FORM</auth-method>
      <realm-name>Example Form-Based Authentication Area</realm-name>
      <form-login-config>
        <form-login-page>/jsp/security/protected/login.jsp</form-login-page>
        <form-error-page>/jsp/security/protected/error.jsp</form-error-page>
      </form-login-config>
    </login-config>
 
    <!-- Security roles referenced by this web application -->
    <security-role>
      <role-name>role1</role-name>
    </security-role>
    <security-role>
      <role-name>tomcat</role-name>
    </security-role>
 
    <!-- Environment entry examples -->
    <!--env-entry>
      <env-entry-description>
         The maximum number of tax exemptions allowed to be set.
      </env-entry-description>
      <env-entry-name>maxExemptions</env-entry-name>
      <env-entry-value>15</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry-->
    <env-entry>
      <env-entry-name>minExemptions</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name1</env-entry-name>
      <env-entry-value>value1</env-entry-value>
      <env-entry-type>java.lang.String</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/bar/name2</env-entry-name>
      <env-entry-value>true</env-entry-value>
      <env-entry-type>java.lang.Boolean</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>name3</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name4</env-entry-name>
      <env-entry-value>10</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
 
</web-app>

[ July 20, 2006: Message edited by: Joseph Smithern ]
[ July 20, 2006: Message edited by: Joseph Smithern ]

[Naseem Khan]

First time you posted this url

http://127.0.0.1:8080/jones/servlet/email5/EmailServlet

Then second time when you posted the url why you replaced email5/EmailServlet with email5.EmailServlet

Your earlier url was correct. The only thing which you have not done at that time was that configuration of <Context> tag in server.xml

First of all you must understand this very well...

Every Servlet class is mapped with some url pattern

For example, your email5.EmailServlet is mapped with url pattern /servlet/email5/EmailServlet.

So while making a request to this servlet instance, url pattern will be used something like this...

http://localhost:8080/jones/servlet/email5/EmailServlet

Suppose url pattern is /Joseph then you url will be

http://localhost:8080/jones/Joseph

Hope it will sort out your problem

Naseem
[ July 21, 2006: Message edited by: Naseem Khan ]

[Ben Souther]

Originally posted by Joseph Smithern:

<Context path="/jones" docBase="C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\jones" reloadable="true" debug="0"/>

....

If you're putting your webapp under the "webapps" directory Tomcat will deploy it for you automatically. There is no need to add an entry to server.xml.

[Joseph Smithern]

I tried this:

http://localhost:8080/jones/servlet/email5/EmailServlet

with this in my web.xml

I have tried this:

<servlet>        
<servlet-name>email5/EmailServlet</servlet-name>        
<servlet-class>email5/EmailServlet</servlet-class>    
</servlet> 
<servlet-mapping>        
<servlet-name>email5/EmailServlet</servlet-name>        
<url-pattern>/servlet/email5/EmailServlet</url-pattern>    
</servlet-mapping>

and I put the context path in my server.xml within the host tag.

It still gives me the error:
type Status report

message /jones/servlet/email5/EmailServlet

description The requested resource (/jones/servlet/email5/EmailServlet) is not available.

If I put the EmailServlet in my servlet classes directory it works:
http://127.0.0.1:8080/servlets-examples/servlet/EmailServlet

Please advise.

[ July 22, 2006: Message edited by: Joseph Smithern ]
[ July 22, 2006: Message edited by: Joseph Smithern ]

[Naseem Khan]

<servlet>
<servlet-name>email5/EmailServlet</servlet-name>
<servlet-class>email5/EmailServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>email5/EmailServlet</servlet-name>
<url-pattern>/servlet/email5/EmailServlet</url-pattern>
</servlet-mapping>

This time your web.xml's servlet-class entry is wrong if its not a typo mistake. I have put that thing in bold.

your servlet entry should be like this...

<servlet>        
  <servlet-name>[B]EmailServlet[/B]</servlet-name>        
  <servlet-class>[B]email5.EmailServlet[/B]</servlet-class>    
</servlet> 
<servlet-mapping>        
  <servlet-name>[B]EmailServlet[/B]</servlet-name>        
  <url-pattern>[B]/servlet/email5/EmailServlet[/B]</url-pattern>    
</servlet-mapping>

Here are few things which you must remember...

servlet-class tag provides the fully qualified class name of servlet. It must be like pkg1.pkg2.ClassName e.g., email5.EmailServlet in your case.

With /servlet/email5/EmailServlet url-pattern, your url should be as you posted http://localhost:8080/jones/servlet/email5/EmailServlet. That is correct.

<servlet-name> tag could be anything. Important thing is both the servlet-name one defined in <servlet> and second in <servlet-mapping> must match e.g., EmailServlet here

Naseem

[Joseph Smithern]

Naseem,

It works and I thank you for your patience and time!