Book Image

Practical Cloud-Native Java Development with MicroProfile

By : Emily Jiang, Andrew McCright, John Alcorn, David Chan, Alasdair Nottingham
Book Image

Practical Cloud-Native Java Development with MicroProfile

By: Emily Jiang, Andrew McCright, John Alcorn, David Chan, Alasdair Nottingham

Overview of this book

In this cloud-native era, most applications are deployed in a cloud environment that is public, private, or a combination of both. To ensure that your application performs well in the cloud, you need to build an application that is cloud native. MicroProfile is one of the most popular frameworks for building cloud-native applications, and fits well with Kubernetes. As an open standard technology, MicroProfile helps improve application portability across all of MicroProfile's implementations. Practical Cloud-Native Java Development with MicroProfile is a comprehensive guide that helps you explore the advanced features and use cases of a variety of Jakarta and MicroProfile specifications. You'll start by learning how to develop a real-world stock trader application, and then move on to enhancing the application and adding day-2 operation considerations. You'll gradually advance to packaging and deploying the application. The book demonstrates the complete process of development through to deployment and concludes by showing you how to monitor the application's performance in the cloud. By the end of this book, you will master MicroProfile's latest features and be able to build fast and efficient cloud-native applications.
Table of Contents (18 chapters)
Section 1: Cloud-Native Applications
Section 2: MicroProfile 4.1 Deep Dive
Section 3: End-to-End Project Using MicroProfile
Section 4: MicroProfile Standalone Specifications and the Future

Developing a RESTful service with JAX-RS

In this section, we will develop a few RESTful services using JAX-RS. We'll start with a simple example, and then we'll add more complex and powerful techniques such as exception handling, advanced conversion of HyperText Transfer Protocol (HTTP) data into Java objects (and vice versa), cross-cutting concerns, asynchronous methods, and DI.

JAX-RS is built around the idea of a request-response pipeline. On the server side, an HTTP request enters the pipeline, then the JAX-RS server invokes any pre-matching filters on the request. It then attempts to match the request with a JAX-RS resource method.  

When the JAX-RS container receives an incoming request, it will perform the following process:

  1. Invoke any registered pre-matching filters.
  2. Attempt to match the request to a resource method. If no match can be made, the container will respond with an appropriate not found HTTP response.
  3. Invoke any registered...