Book Image

Java Projects - Second Edition

By : Peter Verhas
Book Image

Java Projects - Second Edition

By: Peter Verhas

Overview of this book

Java is one of the most commonly used software languages by programmers and developers. In this book, you’ll learn the new features of Java 11 quickly and experience a simple and powerful approach to software development. You’ll see how to use the Java runtime tools, understand the Java environment, and create a simple namesorting Java application. Further on, you'll learn about advanced technologies that Java delivers, such as web programming and parallel computing, and will develop a mastermind game. Moving on, we provide more simple examples, to build a foundation before diving into some complex data structure problems that will solidify your Java 11 skills. With a special focus on the features of new projects: Project Valhalla, Project Panama, Project Amber, and Project Loom, this book will help you get employed as a top-notch Java developer. By the end of the book, you’ll have a firm foundation to continue your journey toward becoming a professional Java developer.
Table of Contents (12 chapters)

Servlet filters

By now, the services should work fine and anyone can query the details of our products. This may be a problem. The details of the products are not necessarily public information. We have to ensure that we only serve the data to partners who are eligible to see it.

To ensure that, we need something in the request that proves that the request comes from a partner. This information is typically a password or some other secret. It could be placed into the GET request parameters or into the HTTP request header. It is better to put it into the header because the information is secret and not to be seen by anybody.

The GET parameters are a part of the URL, and the browser history remembers that. It is also very easy to enter this information into the browser location window, copy/paste it, and send it over a chat channel or over email. This way, a user of the application...