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Build Automation Panel

Last Tuesday, I participated in an online panel on the subject of Build Automation as part of Continuous Discussions (#c9d9), a series of community panels about Agile, Continuous Delivery and DevOps. Automating the build pipeline has many challenges, including third-party dependencies, build version management and especially culture, and panelists discussed real-life experiences addressing these challenges. Continuous Discussions is a community ...

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9 Security mistakes every Java Developer must avoid

Checkmarx CxSAST is a powerful Source Code Analysis (SCA) solution designed for identifying, tracking and fixing technical and logical security flaws from the root: the source code. Check it out here! Java has come a long way since it was introduced in mid-1995. Its cross-platform characteristics have made it the benchmark when it comes to client-side web programming. But with ...

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Do we really still need a 32-bit JVM?

Even today (and it’s 2015) we have two versions or Oracle HotSpot JDK – adjusted to 32 or 64 bits architecture. The question is do we really would like to use 32bit JVM on our servers or even laptops? There is pretty popular opinion that we should! If you need only small heap then use 32bits – it has smaller memory ...

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Exceptions in Lambdas: An Elegant Solution to a Bit of a Mess

Consider the following function for writing to a file: The idea behind the method is to allow the user to pass in different implementations of InputStream to the method so that writeToFile can be called for example with a GZIPOuputStream, SnappyOuputStream (fast compression) or simply a plain FileInputStream. private static void writeToFile(File file, String value, Function<OutputStream, OutputStream> writing) throws IOException{ ...

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Generics Names

Generics type parameter names usually contain one, single capital case character. If you start to read the official ORACLE documentation on generics the first example is /** * Generic version of the Box class. * @param <T> the type of the value being boxed */ public class Box<T> { // T stands for "Type" private T t; public void set(T ...

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Jersey WebResource – Header don’t get appended

Yesterday I ran into a strange problem when using the Jersey WebResource class for doing HTTP calls: it seemed as if the headers I set, simply got ignored when executing the HTTP call. Read ahead. What I tried to achieve was to call a REST Api to get some data from on of our applications. For doing so, I used ...

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Deploying Java EE Application to Docker Swarm Cluster

What is Docker Swarm? Docker Swarm provides native clustering to Docker. Clustering using Docker Swarm 0.2.0 provide a basic introduction to Docker Swarm, and how to create a simple three node cluster. As a refresher, the key components of Docker Swarm are shown below:       In short, Swarm Manager is a pre-defined Docker Host, and is a single point for all administration. Additional Docker hosts are ...

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