WAS for Developers: A Practical Guide to Tomcat and JBoss/WildFly — Configuration, Troubleshooting, and Performance Tuning (Essentials for Web Developers)

Stop treating your Web Application Server as a black box.

Most Java developers press Run in their IDE and never think about what happens underneath. But the moment you need to configure a server from scratch, diagnose a production outage, or tune performance, that knowledge gap becomes a crisis.

WAS for Developers is a hands-on guide built from real-world experience — not theory. It covers the two servers you are most likely to encounter on the job: Apache Tomcat and JBoss/WildFly.

What you will learn:

• Tomcat and JBoss/WildFly architecture from the inside out
• Server configuration — connection pools, JNDI, data sources, and virtual hosts
• Troubleshooting techniques for real production problems
• Performance tuning — thread pools, JVM options, and garbage collection
• Deployment strategies, logging, and security hardening
• Migrating applications from Tomcat to JBoss
• Real-world incident response scenarios and postmortems

Includes a JVM options cheat sheet, WAS error dictionary, and a configuration comparison covering WebLogic and WebSphere.

Written for working developers, by a working developer with 10+ years of enterprise Java experience.