org.dbforms.servlets.base
Class AbstractServletBase

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.dbforms.servlets.base.AbstractServletBase

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

Direct Known Subclasses:

AbstractReportServlet, Controller, FileServlet

public abstract class AbstractServletBase
extends HttpServlet

This is the abstract base class for generating reports.

Author:

Henner Kollmann

See Also:

Serialized Form

Constructor Summary

AbstractServletBase()

Method Summary

void	doGet(HttpServletRequest request, HttpServletResponse response) Basic servlet method, answers requests from the browser.
void	doPost(HttpServletRequest request, HttpServletResponse response) Basic servlet method, answers requests fromt the browser.
void	init() Initialize this servlet.
protected abstract void	process(HttpServletRequest request, HttpServletResponse response) generates a report from request.
protected void	sendErrorMessage(String message, HttpServletResponse response) Send error messages to the servlet's output stream

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

Constructor Detail

AbstractServletBase

public AbstractServletBase()

Method Detail

doGet

public final void doGet(HttpServletRequest request,
                        HttpServletResponse response)
                 throws ServletException,
                        IOException

Basic servlet method, answers requests from the browser.

Overrides:

doGet in class HttpServlet

Parameters:

request - HTTPServletRequest

response - HTTPServletResponse

Throws:

ServletException - if there is a servlet problem.

IOException - if there is an I/O problem.

doPost

public final void doPost(HttpServletRequest request,
                         HttpServletResponse response)
                  throws ServletException,
                         IOException

Basic servlet method, answers requests fromt the browser.

Overrides:

doPost in class HttpServlet

Parameters:

request - HTTPServletRequest

response - HTTPServletResponse

Throws:

ServletException - if there is a servlet problem.

IOException - if there is an I/O problem.

process

protected abstract void process(HttpServletRequest request,
                                HttpServletResponse response)
                         throws IOException,
                                ServletException

generates a report from request. Tries to get data from DbForms.

Parameters:

request - HTTPServletRequest

response - HTTPServletResponse

Throws:

IOException

ServletException

init

public void init()
          throws ServletException

Initialize this servlet.

Overrides:

init in class GenericServlet

Throws:

ServletException - if the initialization fails

sendErrorMessage

protected void sendErrorMessage(String message,
                                HttpServletResponse response)

Send error messages to the servlet's output stream

Parameters:

message - the message to display

response - the response object