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Pushing Docker images to Registry

Tech Tip #57 explained how to create your own Docker images. That particular blog specifically showed how to build your own WildFly Docker images on CentOS and Ubuntu. Now you are ...
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Remove Docker image and container with a criteria

You have installed multiple Docker images and would like to clean them up using rmi command. So, you list all the images as:                ~> ...
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Beyond the JAX-RS spec: Apache CXF search extension

In today’s post we are going to look beyond the JAX-RS 2.0 specification and explore the useful extensions which Apache CXF, one of the popular JAX-RS 2.0 implementations, is ...
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Continuous Deployment: Implementation

This article is part of the Continuous Integration, Delivery and Deployment series. Previous post described several Continuous Deployment strategies. In this one we will attempt to ...
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Do You Really Understand SQL’s GROUP BY and HAVING clauses?

There are some things in SQL that we simply take for granted without thinking about them properly. One of these things are the GROUP BY and the less popular HAVING clauses. Let’s ...
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Manipulating JARs, WARs, and EARs on the Command Line

Although Java IDEs and numerous graphical tools make it easier than ever to view and manipulate the contents of Java archive (JAR, WAR, and EAR) files, there are times when I prefer ...
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The downside of version-less optimistic locking

Introduction In my previous post I demonstrated how you can scale optimistic locking through write-concerns splitting. Version-less optimistic locking is one lesser-known Hibernate ...
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REST Messages And Data Transfer Objects

In Patterns of Enterprise Application Architecture, Martin Fowler defines a Data Transfer Object (DTO) as:An object that carries data between processes in order to reduce the number ...
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Scala snippets 3: Lists together with Map, flatmap, zip and reduce

You can’t really talk about scala without going into the details of the Map, flatMap, zip and reduce functions. With these functions it is very easy to process the contents of ...
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Building dynamic responsive multi-level menus with plain HTML and OmniFaces

Recently, I had to create a responsive multi-level menu with JSF 2.2. Requirements: the menu should:                  be created with ...
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