session timeout in icefaces with jsf

• Standard JSF solution for redirect session expired page.

Without handling page redirection in case of session expiration in JSF standard implementation, you will get the Internal server error with javax.faces.application.ViewExpiredException thrown from JSF engine.

If you're working with standard implementation of JSF (no extended jsf component like myfaces or icefaces), the solution for redirecting page when session has expired is simply to define tag in web.xml like this.

 
  javax.faces.application.ViewExpiredException
  /faces/target.xhtml
 

After applying error handling for ViewExpiredException, client still receive Internal Server Error but page redirection is completely loaded (Actually the page is forwarded instead of redirected).

• But this method cannot be used to handle the same case in Icefaces 3.x!

Icefaces has its own mechanism for handling view states. Components shown in web browser are updated from server by controller called bridge which is javascript ajax that manage connection states.
When session expired is detected, popup message appear to show status.

• Using jsf.ajax to handing session expired error and redirect to another page.

Standard JSF2.x implementation support Ajax by providing jsf.js as javascript resource. By adding the following tag with tag of html document you can use several functions supported by ajax library.


Using Icefaces, you don't need to include above tag into your page source. It bundles this file automatically so you can write call back function jsf.ajax.addOnError that supported by jsf.js to receive exceptions from the bridge. Put the following javascript somewhere in body tag to detect SessionExpiredException.



Whenever the bridge javascript caught SessionExpiredException, the added call back function will redirect to another page.

Although the redirection is completed, you still see a popup message just a second before redirection. To get rid of the popup message, you have to add the following context parameter to web.xml.

 
    org.icefaces.disableDefaultErrorPopups
    true
 

how to highlight multiple word in html page

I have created one server side logic to high light the multiple word

val - is my message in which i want to high light the word
matchWord - is array list of word to be high lighted
highlightWord() - is a function in which i replace word with span and return
string

now pass this string to jsp page and put it in to the div.


package com.idbi.intech.aml.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


/**
* Servlet implementation class HighlightWord_servlet
*/
public class HighlightWord_servlet extends AMLProtectedServlet {
private static final long serialVersionUID = 1L;

@Override
public void performTask(HttpServletRequest request,
HttpServletResponse response, HttpSession session)
throws ServletException, IOException {

String val = "{1:F01EQBLKENAXXX0000000003}{2:O1030658090128CITIGB2LXXX20941550021103181130N}{4:"
+ ":20:3121835002"
+ ":32A:110607EUR500,"
+ ":50K:/FR7619106006520062842101348"
+ "MONSIEUR SLOVENIA GALIFI CHRISTIAN"
+ "74 AVENUE ALFRED BORRIGLIONE"
+ "06100 NICE"
+ ":59:/183104000075518"
+ "PAULINE MUMBI KAMAU"
+ "."
+ "."
+ ":70:VIREMENT FAMILIAL"
+ ":72:/IBK/KIMATHI STREET BRANCH"
+ ":71A:SHA" + "-}";

ArrayList matchWord = new ArrayList();

matchWord.add("GALIFI");
matchWord.add("PAULINE");
matchWord.add("BRANCH");
matchWord.add("VIREMENT");
matchWord.add("FR");

val = highlightWord(val, matchWord);

RequestDispatcher rd = request.getRequestDispatcher("./WEB-INF/JSPs/HighlightWord_jsp.jsp");
request.setAttribute("val", val);
rd.forward(request, response);
}

public String highlightWord(String str, ArrayList matchWord){

StringBuffer temp = new StringBuffer(str);

for (String string : matchWord) {

String patternStr = string;
String replacementStr = "" + string + "";

// Compile regular expression
Pattern pattern = Pattern.compile(patternStr);

// Replace all occurrences of pattern in input
Matcher matcher = pattern.matcher(temp);
temp = new StringBuffer(matcher.replaceAll(replacementStr));

}


return temp.toString();
}

}