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Benchmarking Scala against Java

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A question recently came up at work about benchmarks between Java and Scala. Maybe you came across my blog post because you too are wanting to know which is faster, Java or Scala. Well I’m sorry to say this, but if that is you, you are asking the wrong question. In this post, I will show you that Scala is ...

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Spring 3.1, Cloud Foundry and Local Development

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This post will help you build a Spring 3.1 web application using MongoDB on Cloud Foundry. In addition to pushing to Cloud Foundry, you will also be able to develop in your local environment with a MongoDB instance. Goals The goals for this blog posting will be to build the application locally, then publish to your local Cloud Foundry instance. ...

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Hadoop + Amazon EC2 – An updated tutorial

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There is an old tutorial placed at Hadoop’s wiki page: http://wiki.apache.org/hadoop/AmazonEC2, but recently I had to follow this tutorial and I noticed that it doesn’t cover some new Amazon functionality. To follow this tutorial is recommended that you are already familiar with the basics of Hadoop, a very useful ‘how to start’ tutorial can be found at Hadoop’s homepage: http://hadoop.apache.org/. ...

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Sandboxing Java Code

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In a previous post, we looked at securing mobile Java code. One of the options for doing so is to run the code in a cage or sandbox. This post explores how to set up such a sandbox for Java applications. Security Manager The security facility in Java that supports sandboxing is the java.lang.SecurityManager. By default, Java runs without a ...

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Why Future Generations Will Hate You for Using java.util.Stack

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Before I kill you with some meaningless tautology, here is the gist If your application is near real time or you are sending your code to Mars, you need to keep off the default Stack implementation in Java. Write your own version based on LinkedList. Again, if your application is mission critical and your Stack is expected to be manipulated ...

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Basics about Servlets

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Through this tutorial i will try to get you closer to the Java Servlet Model. Before we start with examination of classes defined within the servlet specification, i will explain basic stuff needed to know before you start with developing web application. Understanding the Java Servlet Models First of all Java Servlet Model is not defined only for the web ...

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Trunk, Branch, Tag And Related Concepts

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Trunk, Branch and Tag concepts are relevant to revision control (or version control) systems. These systems are typically implemented as repositories containing electronic documents, and changes to these documents. Each set of changes to the documents is marked with a revision (or version) number. These numbers identify each set of modifications uniquely. Reminder A version control system, like Subversion, works with a central repository. Users can check ...

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Java 7: File Filtering using NIO.2 – Part 3

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Hello all. This is Part 3 of the File Filtering using NIO.2 series. For those of you who haven’t read Part 1 or Part 2, here’s a recap. NIO.2 is a new API for I/O operations included in the JDK since Java 7. With this new API, you can perform the same operations performed with java.io plus a lot of great functionalities such ...

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Collaborative Artifacts as Code

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A software development project is a collaborative endeavor. Several team members work together and produce artifacts that evolve continuously over time, a process that Alberto Brandolini (@ziobrando) calls Collaborative Construction. Regularly, these artifacts are taken in their current state and transformed into something that become a release. Typically, source code is compiled and packaged into some executable. The idea of ...

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java.lang.ClassNotFoundException: How to resolve

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This article is intended for Java beginners currently facing java.lang.ClassNotFoundException challenges. It will provide you with an overview of this common Java exception, a sample Java program to support your learning process and resolution strategies. If you are interested on more advanced class loader related problems, I recommended that you review my article series on java.lang.NoClassDefFoundError since these Java exceptions ...

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