JBoss Tools and Red Hat Developer Studio Maintenance Release for Eclipse Neon.3

JBoss Tools 4.4.4 and Red Hat JBoss Developer Studio 10.4 for Eclipse Neon.3 are here waiting for you. Check it out!

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From Java to .NET Core. Part 1

There was a time when the word “.NET” was virtually synonymous with bloat, vendor lock-in, and Windows. .NET Core is the exact opposite. It’s blazingly fast. It’s open source under a permissive license (Mostly MIT, some parts Apache-2.0). Unlike some other open-source platforms, .NET Core’s Contributor License Agreement does not grant exclusive privileges to a single corporation. .NET Core is cross-platform, allowing you to target Windows, Mac, Docker, and many flavors of Linux. My favorite resource for getting started with .NET core is Don Schenck’s free book. This post, I hope, can serve as an addendum specifically for Java developers exploring .NET’s flagship language, C#. While C# borrows much from Java, there are important differences to be aware of. Fortunately, some of them are for the better. In this series of posts, I’ll go over a few of the most prominent differences.

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OpenShift and DevOps: The CoolStore Microservices Example

Hi folks,

Today I want to talk about the demo we presented @ OpenShift Container Platform Roadshow in Milan & Rome last week.

The demo was based on JBoss team’s great work available on this repo:
https://github.com/jbossdemocentral/coolstore-microservice

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Download and learn more about Red Hat JBoss Fuse, an innovative modular, cloud-ready architecture, powerful management and automation, and world class developer productivity. It is Java™ EE 7 certified and features powerful, enterprise-grade features such as high availability clustering, distributed caching, messaging, transactions, and a full web services stack.

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Develop and Deploy on OpenShift Next-Gen using Red Hat JBoss Developer Studio

The OpenShift Next-Gen platform is available for evaluation: visit https://console.preview.openshift.com/. It is based on Red Hat OpenShift Container Platform 3.4. This preview allows you to play with OpenShift Container Platform 3.4 and deploy artifacts. The evaluation is limited to one month. The purpose of the article is to describe how to use Red Hat JBoss Developer Studio or JBoss Tools together with this online platform.

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For more information about Red Hat OpenShift and other related topics, visit: OpenShift, OpenShift Online.

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OpenJDK and Containers

What can be done to help the OpenJDK JVM play well in the world of Linux Containers?
I thought I’d start tackling this issue by answering some frequently asked questions:

Why is it when I specify -Xmx=1g my JVM uses up more memory than 1gb of memory?

Specifying -Xmx=1g is telling the JVM to allocate a 1gb heap. It’s not telling the JVM to limit its entire memory usage to 1gb. There are card tables, code caches, and all sorts of other off heap data structures. The parameter you use to specify total memory usage is -XX:MaxRAM. Be aware that with -XX:MaxRam=500m your heap will be approximately 250mb.

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Apache Ant – quick start

Apache Ant should be familiar to every Java programmer: this is a popular software build tool, completely written in Java. Ant uses a build script, which is a simple XML file. Despite its being Java-oriented, web developers also use this tool.

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Java inside docker: What you must know to not FAIL

Many developers are (or should be) aware that Java processes running inside Linux containers (docker, rkt, runC, lxcfs, etc) don’t behave as expected when we let the JVM ergonomics set the default values for the garbage collector, heap size, and runtime compiler. When we execute a Java application without any tuning parameter like “java -jar mypplication-fat.jar”, the JVM will adjust by itself several parameters to have the best performance in the execution environment.

This blog post takes a straightforward approach to show developers what they should know when packaging their Java applications inside Linux containers.

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Getting started with OpenShift Java S2I

Introduction

The OpenShift Java S2I image, which allows you to automatically build and deploy your Java microservices, has just been released and is now publicly available. This article describes how to get started with the Java S2I container image, but first, let’s discuss why having a Java S2I image is so important.

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For more information about Red Hat OpenShift and other related topics, visit: OpenShift, OpenShift Online.

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