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What’s new in Java 8 – Date API

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With the final release of Java 8 around the corner, one of the new features I’m excited about is the new Date API, a result of the work on JSR 310. While Lambda expressions are certainly the big draw of Java 8, having a better way to work with dates is a decidedly welcome addition. This is a quick post ...

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Signing SOAP Messages – Generation of Enveloped XML Signatures

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Digital signing is a widely used mechanism to make digital contents authentic. By producing a digital signature for some content, we can let another party capable of validating that content. It can provide a guarantee that, is not altered after we signed it, with this validation. With this sample I am to share how to generate the a signature for ...

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NoSQL Job Trends – February 2014

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So, it is a few days late but we finally have the NoSQL installment of the February job trends. For the NoSQL job trends, we continue to focus on Cassandra, Redis, Couchbase , SimpleDB, CouchDB, MongoDB, HBase, and Riak. As was stated previously, Voldemort has been replaced by Couchbase and we are looking at other options to include as well. Given the nature of Hadoop and ...

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Deploy to Maven Central Repository

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Do you need to make your Java library publicly accessible? Is your project hosted on GitHub? Do you like idea of “all-in-one deploy to Maven Central Repository” button? I am going to show how to set it up with usage of maven-release-plugin. Source code is hosted on GitHub, so SSH access to source control will be also described. There are ...

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Using the AutoValue Code Generator in Eclipse

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My colleague Moritz of EclipseSource recently came across Google Auto, a collection of Java code generators. AutoValue is one of them and generates Java code for immutable objects. It provides an annotation and an annotation processor to generate Java code for immutable value objects. The current version is labelled RC1 and a 1.0 release is soon to come. The idea ...

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Apache Cassandra steaming through 2.1 Release

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Apache Cassandra is a high performance database system used in an ever growing number of enterprise companies to whom scalability is of major importance. For instance, Netflix, ebay, Reddit and many more companies are adopting Cassandra to their systems, not to mention that Facebook played a crucial part on making it an open source Top Level Project in the first place. Cassandra  is ...

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WebLogic Classloader Analysis Tool

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The WebLogic Server has a built-in webapp called Classloader Analysis Tool, and you may access it through http://localhost:7001/wls-cat You need to login with same user as you configured for the /console webapp. With the CAT, you may check what classes are loaded by your application in the server. This is extremely handy if your app is loading jar that’s already ...

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Why shouldn’t I test private methods?

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Newcomers to TDD ask some interesting questions, here’s one I was asked recently: testing private methods is bad, but why? How did we get here? If you’re trying to test private methods, you’re doing something wrong. You can’t get to TDD nirvana from here, you’re gonna have to go back. It all started with an innocuous little class with an innocuous ...

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Big data: when single node is better than clustered

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There’s a lot of hype about “big data” and a general trend to try to apply Hadoop to almost every problem. However, sometimes it turns out that you can get much better results by writing an old-fashioned, but optimised, single-node version of your algorithm. The specific case I’m writing about is generating recommendations (what items user may like) basing on ...

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