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 Context Propagation to manage context

MicroProfile Context Propagation (https://download.eclipse.org/microprofile/microprofile-context-propagation-1.2/) defines a mechanism for propagating context from the current thread to a new thread. The types of context include the following:

  • Application: This normally includes the thread context class loader as well as java:comp, java:module, and java:app.
  • CDI: The scope of the CDI context, such as SessionScoped and ConversationScoped, is still active in the new unit of work, such as a new CompeletionStage.
  • Security: This includes the credentials that are associated with the current thread.
  • Transaction: This is the active transaction scope that is associated with the current thread. This context is not normally expected to be propagated, but cleared instead.

Apart from the aforementioned context, an application can introduce custom context if needed.

To propagate the aforementioned context, this...