Real-World Java EE Night Hacks

Introduction

The book «Real-World Java EE Night Hacks» by Adam Bien is not another boring textbook on enterprise development theory. It is a collection of live, battle-tested solutions that the author has gathered over years of working with Java EE. The title speaks for itself: these are "night hacks" — the techniques and tricks that experienced developers use when they need to quickly and reliably solve a non-trivial problem. The book was published in 2011, but its value has not diminished: many patterns and approaches remain relevant today, especially for those working with legacy systems or migrating to modern versions of Java EE.

What the book is about

The book consists of 188 pages of dense technical material. Unlike academic tomes, there are no long theoretical introductions — each chapter is devoted to a specific problem and its solution. The author focuses on real-world scenarios: from configuring the persistence layer to optimizing web application performance. Key topics include:

• EJB 3.1 — advanced techniques for working with session beans, asynchronous calls, timers.
• JPA 2.0 — query optimization, working with cache, inheritance strategies.
• JSF 2.0 — custom components, exception handling, UX improvement.
• JAX-RS — creating RESTful services with minimal code.
• Testing — unit tests for EJB and integration tests using Arquillian.
• Performance — profiling, connection pool tuning, fighting memory leaks.

Each "hack" is accompanied by a brief problem description, code, and explanations of why that particular solution works.

Who this book is for

The book is aimed at practicing Java developers who are already familiar with the basics of Java EE and want to deepen their knowledge. It will be useful for:

• Developers migrating from older versions of Java EE (1.4, 5) to version 6.
• Team leads and architects looking for proven patterns for production systems.
• Freelancers and consultants who need to quickly solve client problems.
• Advanced students who already have experience writing servlets and JSP.

Beginners may find the book challenging — the author does not explain basic concepts but gets straight to the point.

What the reader will learn

After reading, you will be able to:

• Use EJB 3.1 to create asynchronous and background tasks without unnecessary code.
• Configure JPA to work with large volumes of data, avoiding N+1 queries.
• Create RESTful services using JAX-RS with minimal configuration.
• Write unit tests for EJB with dependency injection and transactions.
• Optimize JSF applications: reduce page load times, improve error handling.
• Apply patterns for working with caching, pools, and sessions.
• Avoid common mistakes when deploying on application servers (GlassFish, JBoss).

Strengths

The main advantage of the book is its practical focus. Each recipe can be immediately applied in a real project. The example code is concise and well-commented. The author, Adam Bien, is known as a Java Champion and author of numerous open-source projects, so his advice is based on years of experience. The book is written in a lively style, without excessive academicism. It is also worth noting that all examples are compatible with Java EE 6, making them relevant for most modern servers.

Who it is recommended for

I recommend this book to anyone who wants to increase their productivity in Java EE development. It will be an excellent addition to the official documentation and will help fill gaps in practical skills. If you are tired of abstract