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Writing Acceptance Tests for Openshift + MongoDb Applications

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Acceptance testing are used to determine if the requirements of a specification are met. It should be run in an environment as similar as possible of the production one. So if your application is deployed into Openshift you will require a parallel account to the one used in production for running the tests. In this post we are going to ...

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Java Management Extensions

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What is JMX? The Java Management Extensions (JMX) is an API used for managing or monitoring various resources such as applications, devices, services and of course the JVM. Developed through the Java Community Process (JCP), the JMX technology was built as Java Specification Request 3. The JMX technology provides with remote access, therefore the management of an application can be ...

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JAX-RS Bean Validation Error Message Internationalization

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Introduction to Bean Validation JavaBeans Validation (Bean Validation) is a new validation model available as part of Java EE 6 platform. The Bean Validation model is supported by constraints in the form of annotations placed on a field, method, or class of a JavaBeans component, such as a managed bean. Several built-in constraints are available in the javax.validation.constraints package. The ...

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Android Hello World Example – How to develop android apps

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In this tutorial, we will go through the necessary steps you need to take in order to develop your first Android application in Eclipse IDE using the ADT plugin and run it with an Android Virtual Device. The ADT plugin provides easy Android Project creation and management with rich editor features and documentation as well as Android Virtual Device (AVD) management.   ...

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How to Hire Geeks, Brand Your Shop, and Beat the “Talent Shortage”

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As a recruiter of software engineers, I hear every day how difficult it is for software companies to find technical talent. If hiring engineers was easy, I wouldn’t be in business. Using a recruiter is one way to have qualified potential employees neatly packaged and delivered, but there are several other strategies that forward-thinking firms can implement to differentiate themselves ...

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Guava Splitter vs StringUtils

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So I recently wrote a post about good old reliable Apache Commons StringUtils, which provoked a couple of comments, one of which was that Google Guava provides better mechanisms for joining and splitting Strings. I have to admit, this is a corner of Guava I’ve yet to explore. So thought I ought to take a closer look, and compare with ...

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Google Guava BloomFilter

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When the Guava project released version 11.0, one of the new additions was the BloomFilter class. A BloomFilter is a unique data-structure used to indicate if an element is contained in a set. What makes a BloomFilter interesting is it will indicate if an element is absolutely not contained, or may be contained in a set. This property of never ...

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Busting PermGen Myths

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In my latest post I explained the reasons that can cause the java.lang.OutOfMemoryError: PermGen space crashes. Now it is time to talk about possible solutions to the problem. Or, more precisely, about what the Internet suggests for possible solutions. Unfortunately, I can only say that I felt my inner Jamie Hyneman from MythBusters awakening when going through the different “expert ...

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