com.flickrrecsys.servlet
Class FrontEndNavigation

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.flickrrecsys.servlet.FrontEndNavigation

All Implemented Interfaces:

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

public class FrontEndNavigation
extends javax.servlet.http.HttpServlet
implements ThreadListener

This is the servlet which deal with navigation and make use of controllers in order perform the requested tasks This class implements ThreadListener in order to get the notification on the thread finished in the caching class

Author:

Hossein Ghodsi

See Also:

Serialized Form

Constructor Summary

FrontEndNavigation()

Method Summary

void	cachingComplete(java.lang.Object someResult, java.lang.String nsid, java.lang.String servletPath) This method whic is synchronized to avoid the method being used by two threads at the same time updates database.
protected void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handles the HTTP GET method.
protected void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handles the HTTP POST method.
java.lang.String	getServletInfo() Returns a short description of the servlet.
protected void	processRequest(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Processes requests for both HTTP GET and POST methods.

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, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

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

Constructor Detail

FrontEndNavigation

public FrontEndNavigation()

Method Detail

processRequest

protected void processRequest(javax.servlet.http.HttpServletRequest request,
                              javax.servlet.http.HttpServletResponse response)
                       throws javax.servlet.ServletException,
                              java.io.IOException

Processes requests for both HTTP GET and POST methods.

Parameters:

request - servlet request

response - servlet response

Throws:

javax.servlet.ServletException - if a servlet-specific error occurs

java.io.IOException - if an I/O error occurs

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws javax.servlet.ServletException,
                     java.io.IOException

Handles the HTTP GET method.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - servlet request

response - servlet response

Throws:

javax.servlet.ServletException - if a servlet-specific error occurs

java.io.IOException - if an I/O error occurs

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws javax.servlet.ServletException,
                      java.io.IOException

Handles the HTTP POST method.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

request - servlet request

response - servlet response

Throws:

javax.servlet.ServletException - if a servlet-specific error occurs

java.io.IOException - if an I/O error occurs

getServletInfo

public java.lang.String getServletInfo()

Returns a short description of the servlet.

Specified by:

getServletInfo in interface javax.servlet.Servlet

Overrides:

getServletInfo in class javax.servlet.GenericServlet

Returns:

a String containing servlet description

cachingComplete

public void cachingComplete(java.lang.Object someResult,
                            java.lang.String nsid,
                            java.lang.String servletPath)

This method whic is synchronized to avoid the method being used by two threads at the same time updates database. It records the thread completed in order to notify the end user that a task is completed

Specified by:

cachingComplete in interface ThreadListener

Parameters:

someResult - the id of the thread

nsid - user id from the Flickr website

servletPath - where the database details file is located