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Database Migrations in Java EE using Flyway

Database schema of any Java EE application evolves along with business logic. This makes database migrations an important of any Java EE application. Do you still perform them manually, ...
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TDD Against the Clock

A couple of weeks ago I ran a “TDD Against the Clock” session. The format is simple: working in pairs following a strict red-green-refactor TDD cycle we complete a simple kata. ...
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Determining File Types in Java

Programmatically determining the type of a file can be surprisingly tricky and there have been many content-based file identification approaches proposed and implemented. There are ...
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Using JDK 8 Streams to Convert Between Collections of Wrapped Objects and Collections of Wrapper Objects

I have found Decorators and Adapters to be useful from time to time as I have worked with Java-based applications. These “wrappers” work well in a variety of situations ...
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Even Doctors Will Be Data Scientists

We all know how it works. You walk into a doctor’s office complaining about some pain in your leg or otherwise. They take your temperature, get you on the scale, check your blood ...
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JBoss Fuse – Some less known trick

TL;DRexpose java static calls as Karaf shell native commands override OSGi Headers at deploy time override OSGi Headers after deploy time with OSGi FragmentsExpose java static calls ...
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The Optimum Method to Concatenate Strings in Java

Recently I was asked this question – Is it bad for performance to use the + operator to concatenate Strings in Java? This got me thinking about the different ways in Java to ...
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MySQL as Kubernetes Service, Access from WildFly Pod

Java EE 7 and WildFly on Kubernetes using Vagrant (Tech Tip #71) explained how to run a trivial Java EE 7 application on WildFly hosted using Kubernetes and Docker. The Java EE 7 application ...
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Why is my JVM having access to less memory than specified via -Xmx?

“Hey, can you drop by and take a look at something weird”. This is how I started to look into a support case leading me towards this blog post. The particular problem at hand was ...
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“NoSQL Injection” – What 40000 Unsecured MongoDB Databases Mean for our Industry

The news is all over reddit… Major security alert as 40,000 MongoDB databases left unsecured on the internet Security is a feature that is often neglected until it’s too late. And ...
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