Hands-On Enterprise Java Microservices with Eclipse MicroProfile

图书信息

作者	Cesar Saavedra
出版社	Packt Publishing
ISBN	9781838644321
出版时间	2019-08-30
字数	31.8万
分类	进口书,外文原版书,电脑,网络

读书简介

An effective guide to designing, building, and deploying enterprise Java microservices with Eclipse MicroProfile Key Features * Create cloud-native microservices with ease using this detailed guide * Avoid vendor lock-in when implementing microservices using Eclipse MicroProfile * Discover why MicroProfile is a great specification for building microservices in multi-cloud environments Book Description Eclipse MicroProfile has gained momentum in the industry as a multi-vendor, interoperable, community-driven specification. It is a major disruptor that allows organizations with large investments in enterprise Java to move to microservices without spending a lot on retraining their workforce. This book is based on MicroProfile 2.2, however, it will guide you in running your applications in MicroProfile 3.0. You'll start by understanding why microservices are important in the digital economy and how MicroProfile addresses the need for enterprise Java microservices. You'll learn about the subprojects that make up a MicroProfile, its value proposition to organizations and developers, and its processes and governance. As you advance, the book takes you through the capabilities and code examples of MicroProfile’s subprojects - Config, Fault Tolerance, Health Check, JWT Propagation, Metrics, and OpenTracing. Finally, you’ll be guided in developing a conference application using Eclipse MicroProfile, and explore possible scenarios of what’s next in MicroProfile with Jakarta EE. By the end of this book, you'll have gained a clear understanding of Eclipse MicroProfile and its role in enterprise Java microservices. What you will learn * Understand why microservices are important in the digital economy * Analyze how MicroProfile addresses the need for enterprise Java microservices * Test and secure your applications with Eclipse MicroProfile * Get to grips with various MicroProfile capabilities such as OpenAPI and Typesafe REST Client * Explore reactive programming with MicroProfile Stream and Messaging candidate APIs * Discover and implement coding best practices using MicroProfile Who this book is for If you’re a Java developer who wants to create enterprise microservices, this book is for you. Familiarity with Java EE and the concept of microservices will help you get the most out of this book.

目录

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

OpenTracing project

Configuration properties

Automatic instrumentation

JAX-RS

MicroProfile Rest Client

Explicit instrumentation

@Traced annotation

Tracer injection

Tracing with Jaeger

Summary

Questions

MicroProfile OpenAPI and Type-Safe REST Client

Introduction to MicroProfile OpenAPI and its capabilities

Configuration

Generating the OpenAPI document

MicroProfile OpenAPI annotations

Usage examples

Static OpenAPI files

Programming model

Using a filter for updates

Introduction to the MicroProfile REST Client and its capabilities

Defining the endpoint Interface

MicroProfile REST Client programmatic API usage

MicroProfile REST Client CDI usage

MicroProfile Config integration

Simplifying configuration keys

Dealing with client headers

Provider registration for advanced usage

Provider priority

Feature registration

Default providers

Exception mapping

Default exception mapping

Async support

Summary

Questions

Section 3: MicroProfile Implementations and Roadmap

MicroProfile Implementations, Quarkus, and Interoperability via the Conference Application

Current MicroProfile implementations

Thorntail

Open Liberty

Apache TomEE

Payara Micro

Hammock

KumuluzEE

Launcher

Helidon

Generating sample code for the current implementations

Other projects that implement MicroProfile

Quarkus

How to quark a generated MicroProfile project

MicroProfile interoperability – the conference application

Summary

Questions

Section 4: A Working MicroProfile Example

A Working Eclipse MicroProfile Code Sample

Technical requirements

Sample architecture of a multiservice MicroProfile application

Running the sample application

The Docker shell commands

The Svcs1 shell command

The Svcs2 shell command

The web shell command

Details of the sample application

The Config tab

The Health tab

The Metrics tab

The OpenTracing tab

The OpenAPI tab

The KeyCloak tab

The JWT tab

The RestClient tab

Summary

Questions

Further reading

Section 5: A Peek into the Future

Reactive Programming and Future Developments

Reactive programming work in Eclipse MicroProfile

An overview of Reactive Messaging

MicroProfile reactive messaging architecture

Message shapes

MicroProfile Reactive Streams operators

MicroProfile Context Propagation

MicroProfile reactive messaging examples

MicroProfile future developments

Projects outside the umbrella

Long Running Actions

Context Propagation

GraphQL

Differences between GraphQL and REST

GraphQL and databases

Projects in the sandbox

MicroProfile Boost

Eclipse MicroProfile and Jakarta EE

Summary

Questions

Further reading

Using MicroProfile in Multi-Cloud Environments

Using Eclipse MicroProfile for cloud-native application development

Microservices versus cloud native versus container native

What about 12-factor applications?

What about serverless and FaaS?

Cloud-native application development

Developing and running MicroProfile applications across clouds

Bare-metal machines versus VMs versus containers

Considerations when using MicroProfile in a hybrid cloud deployment

Challenges when using MicroProfile OpenTracing in a multi-cloud deployment

Considerations when using Eclipse MicroProfile in a service mesh

Retry

Fallback

Fault injection in the service mesh

Conclusion

Summary

Questions

Assessments

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter 7

Chapter 8

Chapter 9

Chapter 10

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