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Key Concepts of Kubernetes

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What is Kubernetes? Kubernetes is an open source orchestration system for Docker containers. It manages containerized applications across multiple hosts and provides basic mechanisms for deployment, maintenance, and scaling of applications. It allows the user to provide declarative primitives for the desired state, for example “need 5 WildFly servers and 1 MySQL server running”. Kubernetes self-healing mechanisms, such as auto-restarting, re-scheduling, and replicating containers then ensure this state ...

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Improving lock performance in Java

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Plumbr is the only solution that automatically detects the root causes of Java performance issues by interpreting application performance data. After we introduced locked thread detection to Plumbr couple of months ago, we have started to receive queries similar to “hey, great, now I understand what is causing my performance issues, but what I am supposed to do now?” We ...

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Use copy paste programming!

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Copy paste is bad We hate copy paste. Why? Because the result code is unmaintainable. I get a bug reported from QA, I analyze the code, look at logs, debug, drink a lot of coffee and finally I get to the code that is the root cause of the bug. I fix it, test the use case, release new code ...

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Starting multiple JBoss A-MQ JVMs on the same machine

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So I haven’t been blogging as much recently — just been really busy. But my New Year’s resolution is to blog a little more sharing some things I come across frequently, even if it’s simple stuff that might help some people out. So for this entry, I’ll show a quick way to start up multiple JBoss A-MQ instances on a ...

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Where can I run EJBs ?

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EJBs are built for more than just a Java EE application server. They can also execute in a Java EE Web Profile container or plain Java SE environment (Java SE ! yeah – Easy Java Beans !). EJB Lite Required to support only a subset of the features which are provided by the full EJB specification – a lightweight version ...

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My most useful IntelliJ IDEA keyboard shortcuts

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Are you looking for ways to be more productive? It shouldn’t be a secret that performing actions using the keyboard instead of the mouse will save you time. If you think only about a single action it’s not a big deal. What if you use the same action multiple times a day? If you add up all these actions, they ...

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Concepts of Serialization

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With all this talk about why Optional isn’t serializable and what to do about it (coming up soon), let’s have a closer look at serialization. Overview This post presents some key concepts of serialization. It tries to do so succinctly without going into great detail, which includes keeping advice to a minimum. It has no narrative and is more akin ...

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2015 Starts Off Strong for Java 8

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JDK 8 is starting 2015 with a surge in popularity in terms of blog posts and articles. This is coinciding with Java being automatically upgraded to JDK 8 this month. In this post, I list and briefly describe some of the numerous articles and posts on JDK 8 that have been published already in 2015. JDK 8 Streams have been ...

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Getting Started with Gradle: Creating a Multi-Project Build

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Although we can create a working application by using only one module, sometimes it is wiser to divide our application into multiple smaller modules. Because this is a rather common use case, every self-respecting build tool must support it, and Gradle is no exception. If a Gradle project has more than one module, it is called a multi-project build. This ...

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