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)
1
Section 1: Cloud-Native Applications
5
Section 2: MicroProfile 4.1 Deep Dive
10
Section 3: End-to-End Project Using MicroProfile
13
Section 4: MicroProfile Standalone Specifications and the Future

Using MicroProfile Reactive Messaging to build a reactive application

MicroProfile Reactive Messaging 2.0 (https://download.eclipse.org/microprofile/microprofile-reactive-messaging-2.0/) provides a mechanism for building event-driven cloud-native applications. It enables decoupling between the services via messaging. MicroProfile Reactive Messaging provides the @Outgoing annotation for publishing messages and @Incoming for consuming messages. The following figure illustrates how messages travel from the publisher (Method A) to the consumer (Method B). The message can be sent to a messaging store, such as Apache Kafka, MQ, and so on, and will then be delivered to a consumer such as Method B:

Figure 10.1 – Messaging flow

In Reactive Messaging, CDI beans are used to produce, process, and consume messages. These messages can be sent and received via remote brokers or various message transport layers such as Apache Kafka, MQ, and so on. Let's discuss...