ilog.views.gantt.servlet

Class IlvGanttServlet

java.lang.Object

jakarta.servlet.GenericServlet

jakarta.servlet.http.HttpServlet

ilog.views.gantt.servlet.IlvGanttServlet

All Implemented Interfaces:

jakarta.servlet.Servlet, jakarta.servlet.ServletConfig, Serializable

Direct Known Subclasses:

IlvFacesGanttServlet

public abstract class IlvGanttServlet
extends jakarta.servlet.http.HttpServlet

An abstract servlet that can respond to HTTP requests to generate a JPEG image from a Gantt chart or a Schedule chart. As a minimum, your concrete subclass will need to provide an implementation of the createServletSupport() method that will create an appropriate IlvGanttServletSupport object for your application. All of the real work performed by the servlet is delegated to this support object.

Since:

JViews 5.0

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IlvGanttServlet() Creates a Gantt servlet.

Method Summary

Modifier and Type	Method and Description
protected abstract IlvGanttServletSupport	createServletSupport() Creates the servlet support object to which this servlet delegates HTTP request handling.
void	doGet(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response) Responds to the servlet request.
void	doPost(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response) Responds to the servlet request.
protected IlvServletConfigParameters	getConfigParameters() Returns the servlet's configuration parameters.
protected IlvGanttServletSupport	getServletSupport() Returns the support for this servlet.
void	init(jakarta.servlet.ServletConfig config) This method is invoked by the servlet container to indicate that the servlet is being placed into service.
protected void	prepareSession(jakarta.servlet.http.HttpServletRequest request) Prepares a session for the client.

Methods inherited from class jakarta.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class jakarta.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

IlvGanttServlet

public IlvGanttServlet()

Creates a Gantt servlet.

Method Detail

init

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

This method is invoked by the servlet container to indicate that the servlet is being placed into service. This implementation creates and caches the servlet's configuration parameters for later use.

It is always preferable to override the init() method instead of this one. If you do override this method, you must make sure to call super.init(config).

Specified by:

init in interface jakarta.servlet.Servlet

Overrides:

init in class jakarta.servlet.GenericServlet

Parameters:

config - The servlet configuration.

Throws:

jakarta.servlet.ServletException

createServletSupport

protected abstract IlvGanttServletSupport createServletSupport()

Creates the servlet support object to which this servlet delegates HTTP request handling.

getServletSupport

protected IlvGanttServletSupport getServletSupport()

Returns the support for this servlet. If the support has not been created yet, then createServletSupport() is called first.

getConfigParameters

protected IlvServletConfigParameters getConfigParameters()

Returns the servlet's configuration parameters.

prepareSession

protected void prepareSession(jakarta.servlet.http.HttpServletRequest request)
                       throws jakarta.servlet.ServletException

Prepares a session for the client. This method is called at every request before any other method to allow the user to prepare a session for its servlet. The actual implementation is empty, but if your servlet needs to create a session you can overwrite this method to do it.

Parameters:

request - The current HTTP request.

Throws:

jakarta.servlet.ServletException - if the GET request could not be handled.

doGet

public void doGet(jakarta.servlet.http.HttpServletRequest request,
                  jakarta.servlet.http.HttpServletResponse response)
           throws IOException,
                  jakarta.servlet.ServletException

Responds to the servlet request. This method simply calls prepareSession(jakarta.servlet.http.HttpServletRequest) and then IlvGanttServletSupport.handleRequest(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse). You normally do not need to override this method. If you would like to add a new request type, override the IlvGanttServletSupport.handleRequest(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse) method instead.

Overrides:

doGet in class jakarta.servlet.http.HttpServlet

Parameters:

request - The current HTTP request.

response - The HTTP response.

Throws:

IOException - if an input or output error is detected when the servlet handles the GET request.

jakarta.servlet.ServletException - if the GET request could not be handled.

doPost

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

Responds to the servlet request. This default implementation simply calls doGet(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse).

Overrides:

doPost in class jakarta.servlet.http.HttpServlet

Parameters:

request - The current HTTP request.

response - The HTTP response.

Throws:

IOException - if an input or output error is detected when the servlet handles the POST request.

jakarta.servlet.ServletException - if the request for the POST could not be handled.