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com.voytechs.example.helloworld
Class HelloWorldServlet  

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.voytechs.html.application.ToolServlet
              com.voytechs.example.helloworld.HelloWorldServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

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public class HelloWorldServlet

extends com.voytechs.html.application.ToolServlet

This is a sample application which simply displays HelloWorld message back to the client browser.
Here is how we write this application.

1. subclass the ToolServlet class and define its abstract method createSessionPanel.
2. In the method createSessionPanel() we create a new panel, add a Text("Hello World!!!") object and return it.

To install this application in your servlet environment, for tomcat we do the following. We have to define the new servlet in web.xml file and copy the files to the appropriate tomcat directory. We add to WEB-INF/web.xml file: HelloWorld com.voytechs.example.helloworld.HelloWorldServlet 5

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Field Summary

 

Fields inherited from class com.voytechs.html.application.ToolServlet

 

Fields inherited from class javax.servlet.http.HttpServlet

 

Fields inherited from class javax.servlet.GenericServlet

 

Constructor Summary

HelloWorldServlet()           Constructor for our HelloWorld application.

 

Method Summary
com.voytechs.html.component.Panel	createSessionPanel()           This method is called for every new user session the servlet creates.

 

Methods inherited from class com.voytechs.html.application.ToolServlet

doGet, doPost, getName, getPath, getServletConfig, getToolServlets, init, main

 

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, getServletContext, getServletInfo, getServletName, init, log, log

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

HelloWorldServlet

public HelloWorldServlet()

Constructor for our HelloWorld application. We simply need to do this step to define a uniq name for our application. This isn't really needed by our simple applicaton, but some advanced functionality utilizes these application names to allow servlets to interface with each other , ie. ToolServlet.getToolServlets(). So to be a sport, we need to provide the application name.

Method Detail

createSessionPanel

public com.voytechs.html.component.Panel createSessionPanel()
                                                     throws com.voytechs.html.event.EventException

This method is called for every new user session the servlet creates. That is, there is only 1 HelloWorldServlet object instance, but there can be many Panel object instances.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> com >> voytechs >> example >> [ helloworld overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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