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Mastering JBoss Enterprise Application Platform 7

Mastering JBoss Enterprise Application Platform 7

By : Marchioni, Luigi Fugaro
3.7 (3)
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Mastering JBoss Enterprise Application Platform 7

Mastering JBoss Enterprise Application Platform 7

3.7 (3)
By: Marchioni, Luigi Fugaro

Overview of this book

The JBoss Enterprise Application Platform (EAP) has been one of the most popular tools for Java developers to create modular, cloud-ready, and modern applications. It has achieved a reputation for architectural excellence and technical savvy, making it a solid and efficient environment for delivering your applications. The book will first introduce application server configuration and the management instruments that can be used to control the application server. Next, the focus will shift to enterprise solutions such as clustering, load balancing, and data caching; this will be the core of the book. We will also discuss services provided by the application server, such as database connectivity and logging. We focus on real-world example configurations and how to avoid common mistakes. Finally, we will implement the knowledge gained so far in terms of Docker containers and cloud availability using RedHat's OpenShift.
Table of Contents (15 chapters)
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Load balancing with mod_cluster


mod_cluster is an HTTP-based load balancer that can be used to forward a request to a set of application server instances. Compared to legacy balancing solutions balancing solutions such as mod_jk or mod_proxy, mod_cluster provides the following benefits:

  • Dynamic balancing configuration

  • Pluggable server-side balancing metrics

As far as the first point is concerned, a load balancer is commonly based on a static list of servers where requests are directed. In many cases this can be a limiting factor especially when server nodes can be varied at runtime; besides this, maintaining a static list of servers is error-prone and needs to reshaped every time there is a change in your network.

About the next point, mod_cluster (in contrast to other frontend based balancers) uses load balance factors calculated and provided by the backend application servers, rather than computing these in the proxy. Consequently, mod_cluster offers a more robust and accurate set of load...

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