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Coding for the Changes You’ll Have to Make Next Month

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One of the most difficult parts of software development is adapting to change. It’s a guarantee that the concepts, ideas, and possibly the point of the program that you are writing will change several times before it’s actually done. If you have ever heard the buzzwords like Agile, Scrum, Extreme Programming, or anything similar, then you have put some time into writing software ...

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How cool is integration testing with Spring and Hibernate

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I am guilty of not writing integration testing (At least for database related transactions) up until now. So in order to eradicate the guilt i read up on how one can achieve this with minimal effort during the weekend. Came up with a small example depicting how to achieve this with ease using Spring and Hibernate. With integration testing, you ...

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Working Efficiently with JUnit in Eclipse

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Recently I was dragged into a discussion1 with some test infected2 fellows about how we use JUnit within the Eclipse IDE. Surprisingly the conversation brought up some ‘tips and tricks’ not everybody was aware of. This gave me the idea to write this post doing a sum up of our talk. Who knows – maybe there is something new for ...

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Google Guava EventBus for Event Programming

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 It’s a given in any software application there are objects that need to share information in order to get work done. In Java applications, one way of achieving information sharing is to have event listeners, whose sole purpose is to take some action when a desired event occurs. For the most part this process works and most experienced Java developers ...

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SQL Injection in Java Application

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In this post we will discuss what is an SQL Injection attack. and how its may affect any web application its use the back end database. Here i concentrate on java web application. Open Web Application Security Project(OWAP) listed that SQL Injection is the top vulnerability attack for web application. Hacker’s Inject the SQL code in web request to the web ...

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Guava’s Collections2: Filtering and Transforming Java Collections

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One of the conveniences of Groovy is the ability to easily perform filtering and transformation operations on collections via Groovy’s closure support. Guava brings filtering and transformation on collections to standard Java and that is the subject of this post. Guava’s Collections2 class features two public methods, both of which are static. The methods filter(Collection, Predicate) and transform(Collection, Function) do ...

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Tomcat Clustering Series Part 3 : Session Replication

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This is the third part of the Tomcat Clustering Series. In this post we are going to discuss the how to setup session replication in tomcat clustering environment. Session replication makes High availability and full fail-over capability to our clustering environment. [Check the video below for better understanding] In my previous post we discussed about setup simple load balancer and how to ...

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Guava’s Objects Class: Equals, HashCode, and ToString

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If you are fortunate enough to be using JDK 7, the newly available Objects class is the obvious (at least to me) choice for implementing the ‘common’ Java object methods such as equals(Object) [with Objects.equals(Object,Object)], hashCode() [with Objects.hashCode(Object) or Objects.hash(Object…)], and toString() [with Objects.toString(Object)] to appropriately override the default Object implementations. I have written posts about using Objects class: JDK ...

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Scripted Reports with Groovy

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Groovy has become my favorite scripting language and in this blog I look at some of Groovy’s features that make it particularly attractive for presenting text-based reports. The post will show how custom text-based reports of data stored in the database can be easily presented with Groovy. I will highlight several attractive features of Groovy along the way. I use ...

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Hadoop Single Node Set Up

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With this post I am hoping to share the procedure to set up Apache Hadoop in single node. Hadoop is used in dealing with Big Data sets where deployment is happening on low-cost commodity hardware. It is a map-reduce framework which map segments of a job among the nodes in a cluster for execution. Though we will not see the ...

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