Hands-On Enterprise Java Microservices with Eclipse MicroProfile

coverpage

Title Page

Copyright and Credits

Hands-On Enterprise Java Microservices with Eclipse MicroProfile

About Packt

Why subscribe?

Contributors

About the authors

About the reviewers

Packt is searching for authors like you

Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

Download the color images

Conventions used

Get in touch

Reviews

Section 1: MicroProfile in the Digital Economy

Introduction to Eclipse MicroProfile

Enterprise Java microservices

Forces that fuel the digital economy

Multi-speed IT

Introducing Eclipse MicroProfile

MicroProfile value proposition

Summary

Questions

Governance and Contributions

Current Eclipse MicroProfile governance

Sandbox approach to open contribution

Umbrella releases versus projects outside the umbrella

MicroProfile Starter

A quick tour of MicroProfile Starter

Summary

Questions

Section 2: MicroProfile's Current Capabilities

MicroProfile Config and Fault Tolerance

Understanding Eclipse MicroProfile Config

Reading configuration from the MicroProfile Config API

The Config object

The @ConfigProperty annotation

Providing sources of configuration

Default ConfigSources

Custom ConfigSources implementations

Using converters for high-level configuration

Built-in converters

Automatic converters

Custom converters

Understanding Eclipse MicroProfile Fault Tolerance

MicroProfile Fault Tolerance in action

The @Asynchronous policy

The @Retry policy

The @Fallback policy

The @Timeout policy

The @CircuitBreaker policy

The @Bulkhead policy

Tolerance with MicroProfile config

Summary

Questions

Further reading

MicroProfile Health Check and JWT Propagation

Technical requirements

Understanding health checks and how MicroProfile handles them

The Health Check protocol and wire format

The Health Check Java API

Integration with the cloud platform

Human operators

Changes in Health Check response messages

Using JSON Web Token Propagation in MicroProfile

Recommendations for interoperability

Required MP-JWT claims

The high-level description of the MP-JWT API

Sample code that uses MP-JWT

Injection of JsonWebToken information

Injection of JWT claim values

Configuring authentication of JWTs

Running the samples

Summary

Questions

MicroProfile Metrics and OpenTracing

MicroProfile Metrics

Metadata

Retrieving metrics from the server

Accessing specific scopes

Supplying application-specific metrics

More types of metric

Gauges

Meter

Histograms

Timers

Tagging

Server-wide tags

Per-metrics tags

Using Prometheus to retrieve metrics

New in MP-Metrics 2.0

Change for counters – introducing ConcurrentGauge

Tagging

Changes in data output format

MicroProfile OpenTracing