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An Introduction to Docker – Part 1


Solve App Problems 10x Faster with AppDynamics – Monitor production apps at code-level depth with minimal overhead. Start a FREE Trial! What is Docker? In simple terms, the Docker platform is all about making it easier to create, deploy and run applications by using containers. Containers let developers package up an application with all of the necessary parts, such as ...

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Spring MVC: Trgger manual validation of a form object


Sometimes it may be needed to use manual validation in Spring MVC @Controller. This is very simple with Spring’s org.springframework.validation.ValidationUtils class. Learn how to invoke a validator in two different scenarios.             Scenario 1 – invoke validation In this scenario, I have a user form with username field. Username field is validated with custom validator ...

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Presenting the Complete Raspberry Pi 2 Starter Kit


Get the Hardware & the Know-How to Discover a World of Programming Potential Hey fellow geeks, This week, on our JCG Deals store, we have an extreme offer. We are offering The Complete Raspberry Pi 2 Starter Kit for only $115 instead of the original price of $804, yeap that is 85% off. On top of that, we offer FREE ...

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Introducing the ReactiveInflux: non-blocking InfluxDB driver for Scala and Java supporting Apache Spark


I am excited to announce a very first release of ReactiveInflux developed at Pygmalios. InfluxDB missed a non-blocking driver for both Scala and Java. Immutability, testability and extensibility are key features of ReactiveInflux. Comming with a support for Apache Spark it is the weapon of choice. It internally uses Play Framework WS API which is a rich asynchronous HTTP ...

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New CalendarFX View: MonthGridView!


Me and my team have recently begun work on a new view for CalendarFX with the initial goal to display a whole year in vertical columns. The name of the view is MonthGridView. As usual the goal has changed slightly while coding. The view is now capable of displaying any number of months with extra months added in front or ...

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TIBCO BusinessWorks 6 and Container Edition Compared to BW5


[This article was posted some time ago on the TIBCO Blog, already. I also added some information about BusinessWorks Container Edition (BW CE) where appropriate. Most of the characteristics defined below are true for both, BW6 and BW CE] TIBCO ActiveMatrix BusinessWorks 6 (BW6) is a modern integration and service delivery platform ready for modern concepts such Mobile, Cloud, Internet ...

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How to Replace Rules in JUnit 5


The recently published JUnit 5 (aka JUnit Lambda) alpha release caught my interest and while skimming through the documentation I noticed that rules are gone – as well as runners and class rules. According to the documentation, these partially competing concepts have been replaced by a single consistent extension model. Over the years, Frank and I wrote several rules to ...

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Distributed Data Analysis with Docker Swarm


The purpose of this post is to show how powerful and flexible Docker Swarm can be when combined with standard UNIX tools to analyze data in a distributed fashion. To do this, let’s write a simple MapReduce implementation in bash/sh that uses Docker Swarm to schedule Map jobs on nodes across the cluster. MapReduce is usually implemented when there’s a ...

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