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1. JPA Mini Book

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How to encapsulate Spring bean

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As far as I know Spring Framework doesn’t provide any mechanism to encapsulate Spring beans other than having separate contexts. So when you have public class registered in Spring’s Inversion of Control container, it can be autowired in any Spring bean from same context configuration. This is very powerful but it is also very dangerous. Developers can easily couple beans ...

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Database Threat Models

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I finally have a breather and can start working through my backlog of ideas. I start with some background that will make the motivation for subsequent posts clearer. What are the threat models for the persistence layer of an application, specificially the threats against the database itself? Remember that a ‘threat’ is an adverse act, whether intentional (by an attacker) ...

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The Beginner’s Guide to Hazelcast Part 5

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This is a continuation of a series of posts I have written about Hazelcast.  I highly suggest you read the other ones: Part 1, Part 2, Part 3 and Part 4. Things That Makes One Go “Huh?” This post will have no Hazelcast specific code in it. Let me repeat that. This post will have no Hazelcast specific code in ...

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Two Years of Pair Programming

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For the last two years, I’ve built software using pair programming. I recently switched jobs; during this process, I talked to quite a few colleagues and researched practices at many companies. I came to realize that, as rare as pair programming is, rarer still is the way in which we practiced it. When many developers are discussing pair programming, they ...

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The Java Ecosystem – My top 5 highlights of 2014

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1. February the 1st – RedMonk Analyst firm declares that Java is more popular & diverse than ever! The Java Ecosystem started off with a hiss and a roar in 2014 with the annual meeting of the Free Java room at FOSDEM. As well as the many fine deep technical talks on OpenJDK and related topics there was also a ...

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What’s up with Java EE 8 ? (part 2)

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Work on Java EE 8 is still in the initial phases and expected to catch pace in the upcoming year wherein we would see completion of Expert Group formation, more discussions around use cases/features, lots of JIRAs, and draft versions of various specifications (this would be quite interesting!). In part 1, we looked at the new specs which are in ...

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Solving “Water buckets” problem using Scala

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I recently came across a puzzle called the “Water Buckets” problem in this book, which totally stumped me. You have a 12-gallon bucket, an 8-gallon bucket and a 5-gallon bucket. The 12-gallon bucket is full of water and the other two are empty. Without using any additional water how can you divide the twelve gallons of water equally so that ...

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The New Agile–Why Is Agile So Popular?

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Is it the cool name? Is it the actual successes? Is it the drawings with lots of loops in them? Might be all, but above all else, there are the perceived (and maybe the not actual) value of agile, that organizations want. Let’s look at those:     Reduced waste – When Lean was given its name, it was a ...

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