javawebparts.servlet
Class TextReturnerServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--javawebparts.servlet.TextReturnerServlet
All Implemented Interfaces:
java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class TextReturnerServlet
extends javax.servlet.http.HttpServlet

This servlet returns a string from an XML file. Each invocation of the servlet returns one of the items, either randomly (with no repeats until all items have been shown) or in forward or reverse order.

Example configuration in web.xml:

<servlet>
  <servlet-name>TextReturnerServlet</servlet-name>
  <servlet-class>javawebparts.servlet. TextReturnerServlet</servlet-class>
  <init-param>
    <param-name>order</param-name>
    <param-value>random</param-value>
  </init-param>
  <init-param>
    <param-name>itemsFile</param-name>
    <param-value>/WEB-INF/text_returner_items.xml </param-value>
  </init-param>
</servlet>

<servlet-mapping>
  <servlet-name>TextReturnerServlet</servlet-name>
  <url-pattern>/textReturner</url-pattern>
</servlet-mapping>

Example items configuration file:

<TextReturnerServletItems>   <item>0 - It's always darkest before the dawn</item>   <item>1 - A journey of a thousand miles begins with a single step</item>   <item>2 - The universe is like stupidity: both are infinite... and actually, I'm not sure about the universe</item>   <item>3 - I believe there is intelligent life in the universe, except for some parts of New Jersey</item>   <item>4 - If your falling of a cliff, you might as well try and fly</item>   <item>5 - The cost of life is to chance the consequence </item> </TextReturnerServletItems>

Author:
Frank W. Zammetti.
See Also:
Serialized Form

Field Summary
private  Items items
          Bean that holds all our items from the file, and generally does all the work of this servlet.
private static org.apache.commons.logging.Log log
          Log instance.
 
Fields inherited from class javax.servlet.http.HttpServlet
 
Fields inherited from class javax.servlet.GenericServlet
 
Constructor Summary
TextReturnerServlet()
           
 
Method Summary
 void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          doGet.
 void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          doPost.
 void init(javax.servlet.ServletConfig config)
          init.
 
Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service
 
Methods inherited from class javax.servlet.GenericServlet
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

log

private static org.apache.commons.logging.Log log
Log instance.


items

private Items items
Bean that holds all our items from the file, and generally does all the work of this servlet.

Constructor Detail

TextReturnerServlet

public TextReturnerServlet()
Method Detail

init

public void init(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException
init.

Specified by:
init in interface javax.servlet.Servlet
Overrides:
init in class javax.servlet.GenericServlet
Parameters:
config - ServletConfig.
Throws:
javax.servlet.ServletException - ServletException.

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  java.io.IOException
doGet. Calls doPost() to do real work.

Overrides:
doGet in class javax.servlet.http.HttpServlet
Parameters:
request - HTTPServletRequest.
response - HTTPServletResponse.
Throws:
javax.servlet.ServletException - ServletException.
java.io.IOException - IOException.

doPost

public void doPost(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws javax.servlet.ServletException,
                   java.io.IOException
doPost.

Overrides:
doPost in class javax.servlet.http.HttpServlet
Parameters:
request - HTTPServletRequest
response - HTTPServletResponse
Throws:
javax.servlet.ServletException - ServletException
java.io.IOException - IOException


Copyright 2005 Frank W. Zammetti