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Jakarta EE Application Development

Jakarta EE Application Development

By : David R. Heffelfinger
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Jakarta EE Application Development

Jakarta EE Application Development

5 (2)
By: David R. Heffelfinger

Overview of this book

Jakarta EE stands as a robust standard with multiple implementations, presenting developers with a versatile toolkit for building enterprise applications. However, despite the advantages of enterprise application development, vendor lock-in remains a concern for many developers, limiting flexibility and interoperability across diverse environments. This Jakarta EE application development guide addresses the challenge of vendor lock-in by offering comprehensive coverage of the major Jakarta EE APIs and goes beyond the basics to help you develop applications deployable on any Jakarta EE compliant runtime. This book introduces you to JSON Processing and JSON Binding and shows you how the Model API and the Streaming API are used to process JSON data. You’ll then explore additional Jakarta EE APIs, such as WebSocket and Messaging, for loosely coupled, asynchronous communication and discover ways to secure applications with the Jakarta EE Security API. Finally, you'll learn about Jakarta RESTful web service development and techniques to develop cloud-ready microservices in Jakarta EE. By the end of this book, you'll have developed the skills to craft secure, scalable, and cloud-native microservices that solve modern enterprise challenges.
Table of Contents (18 chapters)
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15
Chapter 15: Putting it All Together

What is a servlet?

A servlet is a Java class that is used to extend the capabilities of servers that host server-side web applications. Servlets can respond to requests and generate responses. The base class for all servlets is jakarta.servlet.GenericServlet. This class defines a generic, protocol-independent servlet.

By far the most common type of servlet is an HTTP servlet. This type of servlet is used when handling HTTP requests and generating HTTP responses. An HTTP servlet is a class that extends the jakarta.servlet.http.HttpServlet class, which is a subclass of jakarta.servlet.GenericServlet.

A servlet must implement one or more methods to respond to specific HTTP request types. These methods are overridden from the parent HttpServlet class. As can be seen in Table 11.1, these methods are named so that knowing which one to use is intuitive.

...

HTTP Request

HttpServlet Method

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