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Java 8 Friday: API Designers, be Careful

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Java 8 default methods can break your (users’) code

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At first glance, default methods brought a great new feature to the Java Virtual Machine’s instruction set. Finally, library developers are able to evolve established APIs without introducing incompatibilities to their user’s code. Using default methods, any user class that implements a library interface automatically adopts the default code when a new method is introduced to this interface. And once ...

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Tech Conferences for Dummies – dos and donts

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I love going to tech conferences, I love the buzz, the learning, the engagement and the fun. There are a few things you can do to get the best value out of attending a tech conference, keep on reading.                 Draw a plan and make sure you don’t stick to it Every self respecting tech ...

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JavaOne 2014 – Some First Analysis on Submissions

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Time is running away these days. So many things happening in parallel and of course the most important Java conference is in the middle of everything. JavaOne 2014 closed the CfP doors already and voting is well underway. There are very few things the Program Committee is allowed to talk about but after having skipped that kind of analysis last ...

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Do You Have Tutorial Unit Tests?

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I haven’t posted much recently because I’ve been busy with my new job. This brings up an interesting question – you are busy with a new job a lot when you’ve been doing 6- and 12-month contracts. What works and what doesn’t? What is your learning style?   Depending on the source there are between four and seven learning styles. ...

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Yes, we do all infringe

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When we use Java There is a lot of confusion about my We all Infringe post. So, I’m going to walk everybody (especially the lawyers) through the mechanics. Until last week, all developers and most lawyers operated under a simple rule. APIs are not subject to copyright, but code implementating APIs is subject to copyright. It was a simple dichotomy ...

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Spring Integration 4.0: A complete XML-free example

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1. Introduction Spring Integration 4.0 is finally here, and this release comes with very nice features. The one covered in this article is the possibility to configure an integration flow without using XML at all. Those people that don’t like XML will be able to develop an integration application with just using JavaConfig. This article is divided in the following ...

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Seven Databases in Seven Weeks – Hbase Day 2

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This post is a recap of the second day of Hbase from the Seven Databases in Seven Weeks book. Most of the commands and scripts can be found at GitHub: https://github.com/eyalgo/seven-dbs-in-seven-weeks/tree/master/hbase/day_2 Streaming Script The first thing in day 2 was to download lots of data (big data) and stream it into Hbase. There’s a JRuby script, which I had to ...

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Who’s afraid of the big bad class?

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Ferocious, guzzling black holes of the software universe, super-massive classes result from run-away positive feedback: the class grows so huge that programmers fear any attempt at refactoring and instead simply dump more functionality into it, thereby making it even more likely that the next programmer will also pale before the terrifying refactoring and jettison yet more functionality into the maw. ...

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