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On three-legged elephants

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I’ve often argued that good design—of a language, library, or framework—isn’t about packing in as many features as possible into your solution, rather it’s about discovering a small set of interlocking features that act to reinforce each other. That is to say, we want to maximize the power/expressiveness of our solution, while simultaneously minimizing the surface area. I am, furthermore, ...

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Introducing Accord: a sane validation library for Scala

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Accord is an open-source (Apache-licensed) Scala validation library developed at Wix. It’s hosted on GitHub and you’re welcome to fork and dig into it; let us know what you think! Why another validation library As we were transitioning from Java to Scala we’ve started hitting walls with the existing validation libraries, namely JSR 303 and Spring Validation. While there are ...

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Twitter CLI, using Twitter in your console

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Twitter CLI is a command-line power tool for Twitter. The CLI takes syntactic cues from the Twitter SMS commands, however it offers vastly more commands and capabilities than are available via SMS. Twitter CLI is backed by ruby, so you can run it on any platform that installed ruby runtime environment. Features Deep search: Instead of using the Twitter Search ...

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Spring REST: Exception handling vol. 1

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Table of contents Spring REST: Exception handling vol. 1 Spring REST: Exception handling vol. 2 Spring REST: Exception handling vol. 3 Hi everyone, it’s time to continue publish new articles in my blog. So I’m happy to announce that I’m planning to write a couple of technical series of posts. In the current post I’m going to start talking about ...

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Workshop on Creating a Personal MusicManager Web Application with Struts2, Hibernate and MySQL

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Overview: In this workshop tutorial we’ll develop a personal music manager application using Struts 2, Hibernate and MySQL database. The web application can be used to add your music collection to the database. We’ll display form to add the record and underneath we’ll show all the music collections. From each row the record can be deleted by clicking ‘Delete’ link. ...

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A Popup Editor for JavaFX 8

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For the last couple of months I had the pleasure of working with JavaFX 8 in order to implement a sophisticated user interface for a planning and scheduling application. One of the features needed was a way to perform “in-place” editing, meaning a way to quickly edit some basic attributes of a user selected object. Following the principle “if you ...

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cglib: The missing manual

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The byte code instrumentation library cglib is a popular choice among many well-known Java frameworks such as Hibernate (not anymore) or Spring for doing their dirty work. Byte code instrumentation allows to manipulate or to create classes after the compilation phase of a Java application. Since Java classes are linked dynamically at run time, it is possible to add new ...

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Why I like Spring bean aliasing

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Spring framework is widely used as a dependency injection container, and that’s for good reasons. First of all, it facilitates integration testing and it gives us the power of customizing bean creation and initialization (e.g. @Autowired for List types). But there is also a very useful feature, that might get overlooked and therefore let’s discuss about bean aliasing. Bean aliasing ...

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WebSocket and Java

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WebSocket is a cool new(ish) technology that allows real-time, two-way communication between the browser and the server, with almost no overhead. What I want to do here, is to provide a very succint, but sufficient overview of how to start using the technology. So, a few things to start with: a tcp socket connection is opened between the browser and ...

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