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Mastering JBoss Enterprise Application Platform 7

You're reading from   Mastering JBoss Enterprise Application Platform 7 Core details of the Enteprise server supported by clear directions and advanced tips.

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Product type Paperback
Published in Aug 2016
Publisher Packt
ISBN-13 9781786463630
Length 390 pages
Edition 1st Edition
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Authors (2):
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Luigi Fugaro Luigi Fugaro
Author Profile Icon Luigi Fugaro
Luigi Fugaro
Francesco Marchioni Francesco Marchioni
Author Profile Icon Francesco Marchioni
Francesco Marchioni
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Table of Contents (15) Chapters Close

Preface 1. Installation and Configuration FREE CHAPTER 2. The CLI Management Tool 3. Managing EAP in Domain Mode 4. Deploying Applications 5. Load Balancing 6. Clustering EAP 7 7. Logging 8. Configuring Database Connectivity 9. Configuring EAP 7 for Java EE Applications 10. Messaging Administration 11. Securing the Application Server 12. New Security Features of EAP 7 13. Using EAP 7 with Docker 14. Running EAP 7 on the Cloud Using OpenShift

Clustering overview and misconceptions


Clustering is the ability to mitigate and take care of server failures, such as JVM crashes, physical server crashes, network unavailability, and everything that can take down your system.

Clustering means that when your application is running on a server, it can continue its task on another server exactly at the same point it was at, without any manual failover. This means that the application's state is replicated across cluster members.

The term clustering is meant at the application level; it's not a system cluster, thus at OS level. Hence, your applications, at least your web application, needs to be cluster aware, which means that it needs to be declared as distributable in its deployment descriptor, as follows:

<web-app> 
   <distributable/> 
</web-app> 

Pretty easy, right?

Note

One more thing that you should keep in mind is that clustering a stateless application does not make sense, so your RESTful Web services do...

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