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Monthly Archives: August 2011

What is Dependency Inversion? Is it IoC?

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Today we are going to talk about one of the most confusing topics of all and see if we can unravel the mess of Dependency Inversion, Inversion of Control and Dependency Injection. It’s not completely important that we understand the specifics of each of these names, because many people end up using them interchangeably. It’s pretty unlikely that we are ...

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What every Programmer should know about the memory system

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Traditionally, RAM, or Random Access Memory, was used to describe a memory which offered the same access latency for all its memory locations.  This is barely the case with modern DRAM systems. In this post, I describe a ten thousand foot view of how modern DRAMs work with the hope that it can help the programmers in choosing their algorithms ...

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Those evil frameworks and their complexity

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Frameworks like Hibernate and Spring are industry-standards. JSF, EJB and the likes are also standards and used in many applications. But there are always people that are against these frameworks. This is a language-agnostic topic, and although I’ll be giving Java examples, this applies to every language. The usual arguments against using frameworks are: it is very complex, we don’t ...

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GC with Automatic Resource Management in Java 7

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This post provides a brief overview of a new feature introduced in Java 7 called Automatic Resource Management or ARM. The post delves how ARM tries to reduce the code that a developer has to write to efficiently free the JVM heap of allocated resources. One of the sweetest spots of programming in the Java programming language is automatic handling ...

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Integrating Jersey with Spring

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Spring provides a lot of benefits and promotes best practices with its dependency injection mechanism, application lifecycle management and Hibernate support (just to mention some). In addition when you want to have a clean server-side REST-like JSON Api, I found Jersey to be quite handy. This article briefly highlights how both of them can be integrated. In my little spare ...

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Best Of The Week – 2011 – W35

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Hello guys, Time for the “Best Of The Week” links for the week that just passed. Here are some links that drew JavaCodeGeeks attention: * A Continuous Deployment Example Setup: This article presents a straightforward example of a continuous deployment setup. Jenkins is used as the Continuous Integration server and Git for the Source Control Management, while other open source ...

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Eclipse Memory Analyzer (MAT)

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In times past, when it came to tracking down sporadic memory problems in a complex Java application, it required using a commercial product such as JProbe or a lot of painful and inefficient attempts to recreate the issue. Even if the problem were easy to recreate, unless the problem was blatantly obvious, your application might need to be enhanced in ...

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How Scala changed the way I think about my Java Code

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Some people advocate their preferred language as the only way to enlightenment and productivity boosts way in the two digit percentage range compared to another language in the same category. I don’t believe it. (It’s probably true when you compare things like Java and Assembler, but few do that). There are others that tell you the language doesn’t matter at ...

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Heroku runs Java

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If you are a Java fan boy, like me, then you have a good news to cheer about. Heroku runs Java now! Well, unlike other popular ‘web’ languages like PHP/RoR, Java has the legacy of being cumbersome to deploy and maintain in an web server. All this time, only enterprises had the effort to use the Java stack on their web tier. ...

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How many bugs do you have in your code?

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If you follow Zero Bug Tolerance of course you’re not supposed to have any bugs to fix after the code is done. But let’s get real. Is there any way to know how many bugs you’re missing and will have to fix later, and how many bugs you might already have in your code? Are there any industry measures of ...

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