de.nidanet.dev.google.persistent_users
Class PersistentUsersServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          de.nidanet.dev.google.persistent_users.PersistentUsersServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

public class PersistentUsersServlet
extends HttpServlet

This is a tiny servlet to test the persistence data handling in Google's Appengine.

Since:

2009-06-16

Version:

1.0

Author:

Nico Danneberg (mail@danneberg.de)

See Also:

Serialized Form

Field Summary

private PrintWriter	out The output stream of the response.
private javax.jdo.PersistenceManager	pm The Persistence Manager.

Constructor Summary

PersistentUsersServlet()

Method Summary

private void	createForm() Prints the form to create a user to the response channel.
void	doGet(HttpServletRequest req, HttpServletResponse resp) This method is called for every (get-)request.
void	init() The initialization message is called at startup of this servlet.
private void	out(String msg) Forwards the incoming message to one of the print methods of the response channel.
private void	showUsersList() Prints a list of all currently stored users to the response channel.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, 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

out

private PrintWriter out

The output stream of the response.

pm

private javax.jdo.PersistenceManager pm

The Persistence Manager.

Constructor Detail

PersistentUsersServlet

public PersistentUsersServlet()

Method Detail

init

public void init()

The initialization message is called at startup of this servlet. It only gets a new Persistence Manager.

Overrides:

init in class GenericServlet

doGet

public void doGet(HttpServletRequest req,
                  HttpServletResponse resp)
           throws IOException

This method is called for every (get-)request. It prints out a standard headline and checks the "action" parameter what to do.

Overrides:

doGet in class HttpServlet

Parameters:

req - the request

resp - the response

Throws:

IOException

showUsersList

private void showUsersList()

Prints a list of all currently stored users to the response channel.

createForm

private void createForm()

Prints the form to create a user to the response channel.

out

private void out(String msg)

Forwards the incoming message to one of the print methods of the response channel.

Parameters:

msg - the text to print out

See Also:

PrintWriter.println( String );