Chapter 1. Introduction

Red Hat JBoss Enterprise Application Platform 7 (JBoss EAP) is a middleware platform built on open standards and compliant with the Java Enterprise Edition 7 specification. It provides preconfigured options for features such as high-availability clustering, messaging, and distributed caching. It includes a modular structure that allows you to enable services only when required, which results in improved startup speed.

The web-based management console and management command line interface (CLI) make editing XML configuration files unnecessary and add the ability to script and automate tasks. In addition, JBoss EAP includes APIs and development frameworks that allow you to quickly develop, deploy, and run secure and scalable Java EE applications. JBoss EAP 7 is a certified implementation of the Java EE 7 full and web profile specifications.

Red Hat offers a containerized image for JBoss EAP that is designed for use with OpenShift. Using this image, developers can quickly and easily build, scale, and test applications that are deployed across hybrid environments.

There are some notable differences when comparing the JBoss EAP product with the JBoss EAP for OpenShift image. The following table describes these differences and notes which features are included or supported in the current version of JBoss EAP for OpenShift.

JBoss EAP for OpenShift is updated frequently. Therefore, it is important to understand which versions of the images are compatible with which versions of OpenShift. Not all images are compatible with all OpenShift 3.x versions. See OpenShift and Atomic Platform Tested Integrations on the Red Hat Customer Portal for more information on version compatibility and support.

Automated Transaction Recovery

When a cluster is scaled down, it is possible for transaction branches to be in doubt. The JBoss EAP for OpenShift image has an automated transaction recovery feature that can complete these branches. At the moment, this implementation of automated transaction recovery is provided as technology preview only.

The eap70-tx-recovery-s2i application template that is provided to demonstrate automatic transaction recovery on scale down of application pods is also provided as a technology preview only.