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Akka Notes – Finite State Machines – 1


I recently had the opportunity to play with Akka FSM at work for some really interesting use-case. The API (in fact, the DSL) is pretty awesome and the entire experience was amazing. Here’s my attempt to log my notes on building a Finite State Machine using Akka FSM. As an example, we’ll walk through the steps of building an (limited) ...

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4 Challenges You Need to Address with Microservices Adoption


Want to read more on how enterprise teams scale with microservices? Read the full eBook on “How to Build (and Scale) with Microservices” here! In the last few weeks, we’ve introduced the concept of microservices and its role as a business initiative and how to migrate your organization towards a microservices model. Transitioning to microservices creates significant challenges for organizations. ...

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Content Negotiation in Spring Framework


1. Introduction With what we had done with BeanNameViewResolver, is that we just had created multiple bean views in Spring context to generate the expected output. Spring soon introduced the Content Negotiation strategy, where we can use the traditional [email protected] HTTP message converters, to return desired outputs in JSON or XML, along with some flexibility and dynamicity it provides with the configuration. Often ...

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13 Decks Java Developers Must See to Stay Updated


There are many key figures in the Java domain, each with his own perspective and opinions about the future of the language. While we can’t be at every event, meetup or talk, thanks to various slide sharing sites, we can hear what these influencers have to say. In the following post we’ve collected the best and most interesting decks about Java, ...

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The Changing Economics of Big Data


Perhaps you’re old enough to remember when the library was the place we went to learn. We foraged through card catalogs, encyclopedias and the Reader’s Guide to Periodical Literature in hopes that we’d be able to understand what was going on in other people’s minds when they decided what went where. The process was time-consuming, frustrating and often futile. We ...

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Apache Spark Advanced Cluster Deploy Troubleshooting


In this Apache Spark example tutorial, we’ll review a few options when your Scala Spark code does not deploy as anticipated.  For example, does your Spark driver program rely on a 3rd party jar only compatible with Scala 2.11, but your Spark Cluster is based on Scala 2.10?  Maybe your code relies on a newer version of a 3rd party jar ...

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Painless Containerized JBoss Generic Loan Processing on OpenShift


We talked about the various layers from the bottom up, but have yet to provide you with any application development tooling beyond the Red Hat We have been discussing why application developers can’t ignore their stack anymore in the  App Dev Cloud Stack series. Container Development Kit (CDK). All you have so far is an easy to install project called the  Container Development ...

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Velocity is Not Acceleration


I see a lot of confusion around velocity in new-to-agile teams. Too many people treat velocity as an acceleration measurement. That is, they expect velocity to increase to some large number, as a stable state. Velocity is a rate of change coupled with direction. When managers think they can measure a team with velocity, they confuse velocity with acceleration. As I enter ...

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