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