My Journey Through IT

Understanding Java References

2012-01-11T09:14:00.001+05:30

Playing around with Java References: I could not pay attention to the blog in the recent times and first and foremost I must apologize for not staying in touch with you all in the world of technology. I recently stumbled upon the java.lang.ref package which was available since Java 1.2 but ironically i got to know about it just a few days back. Going through a few articles explaining about the

Hibernate by Example - Part 2 (DetachedCriteria)

2011-11-08T15:16:00.000+05:30

So last time we helped out justice league to effectively manage their super heroes. Today we focus on how The Avengers will be using Hibernate's Detached Criteria to find out their enemies with respect to each superhero so as to protect their super heroes. You can download the working example from here. In this example we take only two entities into consideration. The Avenger & The Villain. We

Hibernate by Example - Part 1 (Orphan removal)

2011-09-06T16:26:00.000+05:30

So i thought to do a series of hibernate examples showing various features of hibernate. In the first part i wanted to show about the Delete Orphan feature and how it may be used with the use of a story line. So let us begin :) Prerequisites: In order for you to try out the following example you will need the below mentioned JAR files: org.springframework.aop-3.0.6.RELEASE.jar

Lessons i learnt playing Angry Birds

2011-08-13T22:34:00.006+05:30

So i finally saved up and bought my first smart phone a few weeks back(A samsung galaxy s i9000 to be specific). I heard about the game Angry Birds even before i had a smart phone but never got a chance to play it. The hype about it was very true. The game is addictive :D. Anyhow my objective of this article is not to disseminate news how awesome Angry Birds is, which is quite obvious with

What i love about PHP

2011-08-06T20:38:00.003+05:30

First of all i must say im relatively new to the whole PHP scene. Coming from an OOP background with mostly Java/C++ experience i must say the transition was not rough as i expected it to be. Unfortunately i have not been able to code in PHP at an industrial level but use it for many of my freelance projects which has been very productive up to now. So i would love to highlight why i love

The story of the ArrayList imposter

2011-07-23T21:50:00.006+05:30

Each and everyone of us, undoubtedly has had used Array lists in our lives as programmers. This story is about an imposter who lives among us, unnoticed, undetected until WHAM you are presented with a bug that makes no sense. Let me give you an example to reveal this imposter :). I have a hypothetical system that stores information on games and their ratings. A glimpse of the DTO i would use is

The MBA Riddle

2011-07-06T11:54:00.000+05:30

So its been a while since i started working. 4 years to be exact. And i decided it is time i pondered on what kind of higher studies i should pursue. For me learning is not about having a piece of paper nicely laminated,framed and hanged in your house. Its about the learning outcome and the value i get from it. You feel this more when you have to self sponsor your studies and not depend on

My two cents on Scrum

2011-07-03T22:16:00.004+05:30

Scrum is an agile methodology which helps companies iterate through a product/project development to successful completion. Back in the days we all know that we were limited to the water fall model which was later extended to be known as the V-Model. Gantt charts and the like were included with these methodologies. The practices defined within these traditional methods were concise and precise.

Font resizing and IE

2011-07-03T22:13:00.000+05:30

Font Size mishaps When it comes to declaring font size we know we have a variety of methods in order to achieve it. Few of them are as below; 1. px – the size in number of pixels 2. em – the size relative to the parent element 3. in – the size in inches 4. cm – the size in centi-meters And a few others are there as well. On top of these there are a few keywords available to define

Local time of any country based on GMT with Java

2011-06-22T10:22:00.000+05:30

In a recent change request for one application i was working on, it was requested to update the time stamp a certain task was done based on the location of the user. We have a separate Country table stored which has the GMT action and the GMT off set defined in minutes. I was searching for a way to get the local time of a certain country using the Calendar object. There were many sites that gave

Struts 2 and Annotations

2011-05-05T15:41:00.000+05:30

Googling around i saw there wasnt any concise article explaining how to integrate Struts 2 with annotations. I will keep this as simple as possible because,well the struts developers have done some awesome work to make it as simple as they can. I will create a sample maven project showing you how to integrate struts 2. Ok first off lets go ahead and create our maven project.Im going with a maven

Secure your webservices with JBoss

2011-04-28T17:39:00.000+05:30

WS-SEC is a vast area in it self and trying to cover the whole topic in one blog post is just not possible. So ill be touching on a glimpse of it by showing you how to achieve ws-sec with Jboss with the least amount of effort. In simplest terms WS-SEC is more or less the same as what you do when you log into a website by providing your user name and password. Only difference is in this case you

JBoss clustering Quick Reference Guide

2011-03-31T16:31:00.001+05:30

So i was involved in clustering two JBoss instances and for some reason i had lost my guide i made for myself last time i did a clustering implementation. This time i thought ill blog it so as to keep it as a reference for myself as well as anyone who might need to quickly do JBoss Clustering as we all know how time critical all IT projects are. I will put this in a step by step approach to make

Its time for some code review

2011-03-16T17:28:00.000+05:30

I know some of us just hate it when we hear the word code review. The thought of some one else going through our code is somewhat offensive to some people. I myself have come across many. But for me this is a good thing given that my reviewer knows what to look for and have a set of parameters set out as a base for him/her to review on. So in this article i would like to highlight a few mistakes

Time to get rid of EARs

2011-03-05T19:34:00.002+05:30

We all know what EARs(Enteprise Archive) are. When talking about enterprise software this is a common term used where we bundle up our application with all the required JAR(Java Archive) files needed by our application at runtime. This has been done for many years and people have adapted to it. Bundling up WARs(Web Archive) inside EARs is a common practice too. In the initial stage even our

Twitter Based Alert System

2011-03-02T10:18:00.001+05:30

We were in need of an alert system for our system in order to notify relevant parties of any errors which would occur in our production servers. There was already an email alert system in place but hey you have to admit no one is going to be checking emails 24x7 yea? :) ... We needed a solution like getting an SMS to our support team's phone, but we didnt have any SMS gateway available. So

JMS and Async, Dont mess with it

2011-02-24T13:05:00.001+05:30

JMS stands for Java Message Service which is an API which is used by middle ware service providers such as ActiveMQ, JBoss MQ, Rabbit MQ etc etc. Its main purpose is to allow disparate systems to communicate based on a common platform. Which means that if i have my front end written in .Net and my back end written in Java for example one way of communicating between the two (other than

Learn, Respect, Triumph

2011-02-16T17:28:00.002+05:30

This post is for all the new developers out there coming to the industry. Take a look at the Title of this post. Ok read it again. Ok Again. Alright now lets get going. I wanted to post something to all the new developers that come into the field of IT. I myself am not a veteran software engineer, i count a little over 4 years of experience. Wanted to share my thoughts about the new guys who come

The problem i faced with jqGrid and IE

2011-02-09T12:14:00.003+05:30

Ok first of all before i start let me say this was not a problem with jqGrid or IE. I just started using jqGrid (hats off to the development team for the comprehensive documentation) in one of my projects i do in my free time. All was going well and i tested it out in IE7/8,FF2/3 and chrome. But i made a common mistake of not testing it in IE 6. When i went to deploy this at the clients

Technical innovation within a company, how do we approach it?

2010-12-11T10:11:00.000+05:30

What does it mean to say technology innovation within the context of a company? Is it the the ability to create the next break through innovative project? Is it about creating the next best framework for development? It can be so many things. But if you look at it, innovation should be looked at from the ground up approach. We cannot have technology innovation without first improving the skill

Plugin Based Architecture With Spring Integration

2010-12-01T15:04:00.004+05:30

Introduction : The purpose of this article is to demonstrate that it is possible to achieve a pluggable architecture using Spring Integration and the patterns it supports. If i were to give an introduction to Spring Integration it is a fairly new addition to the spring's solutions suite. It implements most of the Enterprise Integration Patterns currently known

SQL with Hibernate Criteria

2010-11-26T13:12:00.000+05:30

Hibernate's Criteria is a very comprehensive API which provides the user alot of flexibility to write dynamic queries. But of course nothing is perfect. I came across a situation where i had to truncate a date field in order to get the correct result set without considering the time portion. While going through the Criteria API I did not find anything which allowed me to do this. And hence in the

Why the saying "If all you have is a hammer then everything looks like a nail" is so true in the IT industry

2010-11-21T11:59:00.001+05:30

"If all you have is a hammer then everything looks like a nail" - Now do not ask me who quoted this or from where i found it.. I vaguely remember seeing it on one of my buddies gtalk status some time back. But the reality of this statement struck me a week back. We had got this new project in our company. Not a major high scale project. But involved some calculations. Was very interesting. Our

XML Parsing with AXIOM

2010-10-29T10:41:00.000+05:30

Recently a friend of mine inquired about what the best way is to parse XML. I have to say im not an expert in this subject but from what i have read i instantly remembered that AXIOM is a pull parser which means that when you request for a particular element within your XML document push parsers will give you that exact element where as other pull parsers will build the whole XML document before

My First Experience with MongoDB

2010-10-14T17:22:00.003+05:30

I know im pretty much slow to this concept of NoSQL. But nevertheless better late than never right ? :) ... So this is my first post on getting my feet wet in the world NoSQL. I have to say coming from a RDMS background it was not much hard to get my self familiar with MongoDB. Ofcourse there are a number of NoSQL implementations out there. But going through each of them MongoDB was the one i

APIs you can use in your web site

2010-09-23T09:17:00.000+05:30

This article lists down some useful web APIs you can use in your day to day web site development. I found the Google chart API to be quite impressive.

Caching with Hazlecast using Spring

2010-09-22T07:44:00.002+05:30

Found an article explaining how to wire up Hazlecast caching with Spring. You can check out the article here.

Stored procedures with hibernate

2010-09-20T17:39:00.000+05:30

In an earlier post i wrote up an article explaining how to call stored procedures using Spring's StoredProcedureCall template. This i believe is a very clean solution to handle all stored procedure related details. But this article is for those who already use the hibernate template and want to get things done using that without going into much details of using the Spring's StoredProcedureCall.

Declarative Transaction Defintion With Spring

2010-08-30T10:17:00.000+05:30

In the current project i was working we were using spring 2.0 and was declaring transactions the old way using a ProxyFactoryBean and injecting the transaction interceptor to the Proxy. Although this works fine it just clutters your spring configuration IMO. Recently we migrated our application to Spring 3.0 and i thought we should move away from the old ways of doing things with Spring.

Some Cool Ubuntu Plugins to have

2010-07-21T09:17:00.003+05:30

Found this article giving some cool things you can use if your on Ubuntu. Check it out.

Running embedded JMS with Spring

2010-07-15T10:16:00.004+05:30

I was experimenting on how to run active mq embedded with spring so as to ease out unit testing of queues. First i looked at the doc provided in active mq but the thing is the namespace URI provided in the site was invalid and as such it didnt work right out of the box. Then i stumbled upon this article which showed the correct namespace to include. And also you need to include xbean-spring-3.4.

An Abstraction to use HibernateDAOSupport

2010-07-02T11:42:00.005+05:30

In this post i would like to share with you guys on this DAO abstraction i have created by using HibernateDAOSupport for the previously mentioned development framework im currently creating. First of all i start with defining my BaseDAO.package com.dyna.frm.commons.dao;import java.io.Serializable;import org.springframework.transaction.annotation.Propagation;import

Hibernate's AnnotationSessionFactoryBean

2010-06-30T13:02:00.004+05:30

These days im a bit busy with creating a new framework to be used for development of enterprise projects. I was using the hibernate template to deal with all database related activity and used the HibernateDAOSupport class as well. When configuring it at first i found it to be very cumbersome because you have to specify each and every annotated class within its configuration as such;

For all your CSS needs

2010-05-21T08:54:00.001+05:30

Check this out. Has so many tutorials and designs that you can use or just learn the true power of CSS. Great site.

ListIterator in Java

2010-05-20T08:54:00.002+05:30

Learned about this just now and thought ill blog about it for any one else who might find it useful. We normally use the default iterator to traverse through any collection. But have you ever needed to traverse backwards and forward? Or maybe add an element to a location while traversing. Then the answer is to use the ListIterator interaface while allows you to carry out such tasks.Check out the

Stored proc with ease with Spring

2010-05-17T14:51:00.004+05:30

Our current project was doing stored proc calls natively using SQL which in my opinion was very cumbersome and error prone and unable to extend without ease. While going through the Spring documentation i saw that they provide an abstraction for calling Stored procedures. Hence in this aricle i will explain step by step how i integrated Spring's Stored proc capability.First create a class that

Serialize with care

2010-05-17T14:24:00.002+05:30

To think serialization meant just implementing the Marker interface Serializable and just get on with life as usual. As if it would be that easy. What fun would that be right? So today i was breaking my web services to a separate EAR because of the need to load balance and fail over web services. In that i had an exception which was propagated from the EJB layer which was remotely deployed. It

Use Arrays.asList() method with caution

2010-05-17T14:10:00.003+05:30

Hey guys,Been a while since the last post. Work has been hectic and i wasnt really in the mood to blog. My apologies. So getting along with it. I just got to know this interesting detail about java's Arrays.asList() method. If you go through the source code you will find out that it will not give you an implementation of the ArrayList class. Because it has an anonymous inner implmentation of the

Must have Google product for website development

2010-04-20T09:00:00.001+05:30

Here is an article listing down the top most used google products for web site development

Java object memory structure

2010-04-20T08:59:00.002+05:30

Found an interesting article explaining how to calculate how much memory your java object takes on the heap and the structure of an object.

Copying files in Java using NIO

2010-02-24T10:29:00.003+05:30

Read an article on Java IO and found out that rather than using the normal stream reader classes in Java we can use the Java NIO api which does native I/O operations rather than going throught he java memory model which significatly improves I/O calls performance. Following is an example i got from that article showing how you can do a simply file copy ;String orig ="file.xml";String dest = "

Installing the Firefox JRE Plugin on Ubuntu

2010-02-05T08:37:00.001+05:30

For sometime i have been trying to make applets work with firefix running on Ubuntu. It always failed saying cannot find plugin. Today when googling around vola i find the answer in the following post http://daveshuck.instantspot.com/blog/2008/01/18/Installing-the-JRE-plugin-in-Firefox-on-Ubuntu/ Now applets are loading perfectly on firefox on Ubuntu.

Want to change your normal eclipse project to a java project?

2010-02-03T08:47:00.003+05:30

Look no further, it is clearyly explainged here on how to change your current project type to a java project. Given to me by a collegue of mine which i thought was useful enough to blog about. Btw guys look forward to some blogs relating to stored procs with Spring as well as JBOss clustering simplified... Thats the coming attractions for now ;) ...Cheers

A safer way to map your enums to the DB

2010-01-21T12:43:00.002+05:30

The following post explaing how to map your enums safely to the database. I personally think this is a great idea proposed. Requires few extra lines of coding, but maintains data intergrity.http://www.vineetmanohar.com/2010/01/11/3-ways-to-serialize-java-enums/

Less HTTP Requests Better Reponse

2010-01-21T11:27:00.002+05:30

Have you ever used background-image url in your css? if so you know that each one means another HTTP request. To resolve this issue you can use data uri which encodes the image as base64. Only downside of this is that it is not supported in IE versions lesser than 8. The following URL shows how you can accomplish this.http://robertnyman.com/2010/01/15/how-to-reduce-the-number-of-http-requests/

Specially For JQuery UI Fans

2010-01-01T19:49:00.003+05:30

Going through some articles found a some what useful article describing some of the useful jQuery UI plugins which every developer would come across. I for a fact never knew jQuery supported the marquee tag which is quite obsolete now but yet supported by all current browser. The article can be found here.Cheers

A cool java decompliler for Eclipse

2009-12-30T13:27:00.004+05:30

Found a pretty cool java decompiler for eclipse. Can be found here.

jQuery Tips and validations

2009-11-30T11:54:00.000+05:30

Article 1Aricle 2Article 3

Firfox performance tuning tips

2009-11-30T11:13:00.001+05:30

DZone had this amazing article on how to improve the performance of firefox. Give it a try guys... http://webanthology.net/all-you-need-to-optimize-firefox-for-better-performance-33-tips/2009/11/29/

Some useful yet basic CSS

2009-11-20T16:23:00.001+05:30

http://www.webdesignerwall.com/tutorials/5-simple-but-useful-css-properties/It might be some basic ones but sure has some day to day useful CSS functionality clearly explained.

Want to unit test your Statis classes? Power Mock to the Rescue

2009-11-20T16:15:00.003+05:30

While reading through some articles on dzone i stumbled upon this google project which allows you to test your static methods. Now i have used easy mock which i integrated to our current project. But easy mock does not allow you to test static classes. It basically creates mock methods based on the interface you pass into it. This on the other hand will allow you to test your static methods which

jQuery best practices and common mistakes

2009-11-18T09:37:00.002+05:30

From recent times i have had a passion to learn jQuery which is the much talked about Java Script framework these days. Today i found these few articles which exlaines common mistakes we make when coding through jQuery and how to avoid them. I also found a pretty valuable piece of software called dynaTrance which allows you to monitor Ajax performance and find bottle necks just like profiling in

Marquee HTML tag

2009-11-12T16:31:00.004+05:30

I was in need of doing a page which had a table to which content was written dynamically and with the need of horizontally manuvering it within the page. There were many help online but using varous JS frameworks. I did not want to be bombarded with frameworks as this was just a small thing. Luckly a colleuge of mine who is a major UI guru told me of the marquee html tag which allows me to

New MQ Released by JBoss

2009-10-30T10:15:00.003+05:30

JBoss has released a Message Oriented Middleware component which also supports JMS 1.1 and is highly scalable with load balancing capabilities. More info can be found at the below link; http://jboss.org/hornetq Should give it a try and see. If any of you guys have already used it please share your thoughts about this product.

InteliJ IDEA goes open source

2009-10-16T08:57:00.001+05:30

This is superb news to all developers. Always loved developing in this editor and finally they have release a community edition. Superb. You can download it at the following link; http://www.jetbrains.com/idea/nextversion/free_java_ide.html?utm_source=twitter&utm_medium=Announce&utm_campaign=IDEA9_CE Happy developing every body :D

JBoss Caching Integration

2009-10-06T08:58:00.010+05:30

JBoss caching is a very powerful caching mechanism developed and as far as i know this is the only Tree Cache implementation currently available. If i give a briefing on what caching is all about, caching allows you to minmize the time you go to the database to fetch data. We all know how costly database access is, and caching allows us to minmize those calls by caching the results fetched from

Few SQL Select Tips

2009-10-05T16:23:00.001+05:30

Was working on a Jasper report and i was able to learn some new SQL select options which i didnt know of and thought to share it with you guys. 1. To concatinate fields to one column use the following; SELECT a.last_name || ' ' || a.first_name || ' ' as pax_name from Passenger a 2. To put a condition within the select statement use the following; SELECT a.checking_sequence_number

An API to store primitive types in Collections

2009-09-29T17:08:00.002+05:30

Found a project on source forge which allows you to store primitive data types within collections. What this does is consume less memory. You can find the project at the following link.http://trove4j.sourceforge.net/

Spring Mail API Wrapper

2009-09-29T11:31:00.003+05:30

Recently it was needed at my working place to have a module to send SMTP mails. I found out that Spring provides a nice wrapper around the Java Mail API so you do not need to deal with boilerplate code. Hence after a few hours of Googling and coding I was able to come up with an API which sends mail using Spring. Following I give you the code snippets required.package

A replace all string function for javascript

2009-09-21T13:50:00.006+05:30

function replaceAll(strVal){ var regEx = /test/g; return strVal.replace(regEx,"test1"); } What this does is replace all words "test" with "test1". If you do not want to add it globally and only want a replaceFirst method then just removed the letter "g" appended to the end of the "regEx" variable. That letter is the one that says to apply the regex globally.

Adding / Removing Options In A Combo Box

2009-09-18T14:10:00.001+05:30

This JS function removed all options in a combo box except the first entry. If you want to remove the first entry as well then change the i>0 to i>=0function removeExistingOptions(selBox){ var i; for (i = selBox.length - 1; i>0; i--) { selBox.remove(i); }}The following function adds options to an existing combo box.function addOptions(selBox

DOM Manipulation In Tables

2009-09-18T12:13:00.001+05:30

I was playing around with DOM manipulations in html tables and i wanted to add and remove table rows dynamically. In the end with the help of W3C school i was able to come up with a solution. Below is what i came up with in the end. var msgDetailsTable = document.getElementById("msgTable"); msgDetailsTable.deleteRow(1); var x =

How to install jvmstat on linux

2009-09-17T12:17:00.001+05:30

To install jvmstat on linux follow the below instructions;1. Create a directory where you want to install jvmstat2. Download jvmstat from http://developers.sun.com/dev/coolstuff/jvmstat/3. Unzip the distribution to the directory you created in the first step.4. Change your PATH settings as follows; PATH=$PATH:/path_to_your_unziped_distribution/bin5. Set the environment variable: export

A nice Garbage collection monitoring tool

2009-09-17T11:29:00.001+05:30

http://www.unixville.com/~moazam/stories/2004/05/18/visualizingGarbageCollection.htmljvmstat and visualgc is used to monitor application's Garbage collection. A very useful combination of tools to find memory leaks and the sort as I see it.

The JVM and how it handles stack and heap spaces

2009-09-17T10:21:00.003+05:30

A recent discussion was going on about whether we should be using variables with a for loop or not. Going on those lines i stumbled upon a few articles explaining about the same.http://rmathew.blogspot.com/2007/01/local-variables-in-java.htmlhttp://www.coderanch.com/t/416620/Beginning-Java/java/What-stored-Stack-Heaphttp://forums.sun.com/thread.jspa?messageID=2406140A key point noted in the first

Java init blocks and static blocks

2009-09-15T16:13:00.001+05:30

http://sanaulla.wordpress.com/2008/05/01/initialisation-blocks-in-java/Shows how to define static and init blocks in your class files.

Java Anti-Patterns

2009-09-15T15:49:00.000+05:30

Shows the common mistakes we make sometimes when coding. A must read for every developer IMO.http://www.odi.ch/prog/design/newbies.php#0

Java is always pass by value

2009-09-11T17:38:00.001+05:30

Interestingly enough after 2 years in the IT industry only today i knew that java was always pass by value. Meaning even if you pass an object to a method basically a copy of the value of the reference(basically the memory address) is passed to the method. The below article elbaorates on this even more.http://www.javacertificate.net/passbyvalue.htm

CVS code commenting templates in eclipse

2009-09-11T12:04:00.001+05:30

This article explains how you can integrate some code commenting templates which you can use when committing your code to CVS. Pretty useful.http://www.eclipsezone.com/eclipse/forums/t54631.html

JBoss perfomance Tuning Tips

2009-09-09T16:46:00.000+05:30

Found a really nice article explaining how you can tweak your JBoss instance in order to get maximum performance.http://www.mastertheboss.com/en/jboss-application-server/113-jboss-performance-tuning-1.html

Java Heap Size Vs Native Memory Space

2009-09-08T09:59:00.001+05:30

Found a pretty interesting article explaing what causes out of memory exceptions to fire, how java heap space and native memory is used by an application.http://www.ibm.com/developerworks/linux/library/j-nativememory-linux/index.html

Test Driven Development (TDD)

2009-09-05T19:35:00.006+05:30

Been reading a bit on TDD recently and for some reason it has caught my attention. This is not something i have done ever in my kind of short carrier in IT :). But its a new concept for me and i kind of like how it looks at software developement. Hence it got my attetion.What TDD specifies is you write your unit test class first. You define the classes you may need. Of course at first your test

Terminator. A must have tool for developers on linux

2009-09-03T16:30:00.003+05:30

Pretty awesome tool which is able to open multiple command lines in one terminal. It increases productivity at least in a very small way and if you are running multiple servers at the same time this is a must have tool.http://www.ubuntugeek.com/terminator-multiple-gnome-terminals-in-one-window.html

Linux Permissions

2009-09-03T15:32:00.000+05:30

In linux the way we usually give permissions is by providing the command chmod 777 yourfile. This gives everyone read,write and execution privileges. But there is a better way to give permissions. Its as follows; chmod u=rx file (Give the owner rx permissions, not w) chmod go-rwx file (Deny rwx permission for group, others) chmod g+w file (Give write permission to

Singlish Converter

2009-09-03T15:23:00.000+05:30

Pretty cool tool to convert English to Sinhala. Have fun;http://www.ucsc.cmb.ac.lk/ltrl/services/feconverter/t1.html

Connect to other Linux machines with SSH and no password

2009-09-03T15:22:00.000+05:30

Check out this link which explains how you can ssh into a machine withouth providing the password.http://www.go2linux.org/ssh-login-using-no-password

A JS Framework for application development

2009-09-03T11:46:00.001+05:30

Found a really nice JS Framework to support application development. Can be found athttp://cappuccino.orgIts under LGPL as well. One important note in their site is abt JQuery."Cappuccino is not designed for building web sites, or making existing sites more "dynamic". We think these goals are too far removed from those of application development to be served well by a single framework. Projects

Some useful Eclipse Templates

2009-09-02T17:11:00.001+05:30

Found an aritcle describing some useful eclipse code templates. One thing which i found pretty useful was putting the isDebugEnabled check when doing debug level logging. The link can be found below;http://eclipse.dzone.com/articles/useful-eclipse-code-templates

JBoss and log4j

2009-09-01T09:13:00.004+05:30

Recently I got the following error when deploying my JBoss Application.log4j:ERROR Could not instantiate class [org.jboss.logging.util.OnlyOnceErrorHandler].java.lang.ClassNotFoundException: org.jboss.logging.util.OnlyOnceErrorHandlerTo see the problem was that the log4j and commons-logging jars which were already in JBoss was conflicting with the Jars I had on my war distribution. It was easily

Cool memory analysing tool for eclipse

2009-08-28T13:23:00.001+05:30

Found a pretty cool tool to analyse heap dump files from within eclipse called Memory Analyzer. You can check for memory allocation and find out about your memory leaks, what processes are taking huge heap memory etc. More info can be found in the following links.http://www.eclipse.org/mat/http://ice09.wordpress.com/2009/06/28/eclipse-galileo-mat-and-a-little-spring/

The Perm Gen Exception in JBoss

2009-08-28T13:16:00.001+05:30

We sometimes get the PermGen runtime exception thrown from JBoss when running our app. Following in the lines of the exception i stumbled upon two very useful articles explaining the same. This can be found at;http://www.unixville.com/~moazam/stories/2004/05/17/maxpermsizeAndHowItRelatesToTheOverallHeap.htmlhttp://narencoolgeek.blogspot.com/2007/08/heap-size-and-perm-size.htmlAs it states

Java EE 6 Is Out

2009-08-26T12:54:00.001+05:30

Wow some pretty cool features are out with the new Java EE 6 package. Nice post on the same can be found @ http://www.devx.com/Java/Article/42351/0/ Particularly I believe the Asynchronus type method invocation on Session beans is a pretty useful feature as some times we have to use MDBs to replicate the same kind of behaviour even though what we really need is just a non blocking call.

Singleton not really singleton ??????

2009-08-22T17:25:00.001+05:30

The power of Java reflection is amazing. Check the following post on how you can even access Singleton classes and create new objects . Amazing...http://www.javaworld.com/community/node/892

Hibernate And Oracle User Defined Types

2009-08-18T13:34:00.003+05:30

I came across a situation recently where i had to use hibernate to read an Oracle defined object type which was used as a column type in the database. A friend of mine shared a useful link which explained how to do this using hibernate 2. But as we were using hibernate 3 I had to do a few adjustments to get it working. Following I share the procedures you need to follow in order to get hibernate

Time for some realistic planning

2009-08-16T19:25:00.003+05:30

Ok so we have talked about iterative development, how to implements it then we got on to estimation and this post continues in that path to make it possible for you to provide reasonably realistic estimations and also talks about how to handle the customer when it comes to tight situations.So you and your team come up with an estimate for the whole project and guess what, the customer thinks its

The Dreadful Estimates

2009-08-11T21:49:00.004+05:30

Well the title of this post it self is self explanatory aint it ;) ... We all know how hard it is to estimate something in our own lives. Moms will always ask how long will it take to clean your room, wife will ask how long will it take for you to get home, if you ask your dad for something he will ask how much does it cost.. So as the pattern goes on you can see all of us live in a world

Iterative Software Development Cont.....

2009-08-09T20:31:00.002+05:30

My last post gave an introduction to what iterative development is all about and what kind productivity and value addition it brings to the table. In this post i want to address the questions unanswered in my last post. Cant keep the readers in suspense now can i ;) ... But hey everybody likes a little thriller every now and them right? :) .... So what were the questioned that were unanswered in

Iterative Software Development

2009-08-09T20:16:00.003+05:30

Ive been wondering why sometimes we in our projects face tight dead lines and if there is any way we could overcome such situations. In my current project we are kind of facing a tight deadline situation as well and this led me to investigate on this topic of how the development process should be organised so that these kind of issues can be resolved before hand as much as possible.My eyes caught

JavaScript instance methods vs Class methods

2009-08-06T15:03:00.001+05:30

Javascript instance methods are those that start with the "this" keyword where as class methods start with the prototype keyword. The difference between the two is that given an object instance methods are created per object whereas class methods are only one per class and not per instance so you will avoid creating duplicate object methods. Examples of the two are as follows; 1. Instance

Java Script Date Object

2009-08-05T12:58:00.003+05:30

Java script consist of a Date object which is kind of similar to the Java Date object where as it uses the time since the epoch but some utility method available in the Java language are not available in the JS Date object version. Some of the utility method which i cared to share are as follows;getDate() - Get the day of month e.g 1-31getMonth() - Gets the month of the year. Note that it starts