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Java 8: Bye Manual SQL, Hello Speedment!

Most applications written in Java require some form of data storage. In small applications this is often realized using a primitive JDBC-connection that is queried using ordinary SQL. Larger systems on the other hand often use an Object Relational Mapping (ORM) frameworks to handle the database communication. There are pro’s and con’s with both of these approaches, but both tend ...

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Shadow Fields vs. Property Accessors Interface Round 3

This is round 3 of the Shadow Fields vs Property Accessors Interface. If you are new and not sure what the fuss is about please check out my previous post or my first post on the topic of saving memory when developing JavaFX applications. As a Java developer my main concern is having a good balance between performance, memory usage and lowering boilerplate ...

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JUnit 5 – Architecture

Now that we know how to set JUnit 5 up and write some tests with it, let’s take a look under the covers. In this post we’ll discuss the JUnit 5 architecture and the reasons why it turned out this way. Overview This post is part of a series about JUnit 5: Setup Basics Architecture Conditions Injection … JUnit 4 ...

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Converting string configuration properties to other types, with a bit of Optional

Somedays you come across some code and think that’s pretty, why didn’t I think of that? So my long time colleague Mark Warner has a nice twist on the standard name/value store pattern using method references to deal with converting from a String. int size = store.getProperty("cache.limit", 500, Integer::parseInt); boolean enabled = store.getProperty("cache.enabled", true, Boolean::getBoolean); I took his example and ...

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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

spring-interview-questions-answers

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. https://github.com/pygmalios/reactiveinflux It internally uses Play Framework WS API which is a rich asynchronous HTTP ...

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