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  • Book Overview & Buying RESTful Java Web Services
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RESTful Java Web Services

RESTful Java Web Services

By : Bogunuva Mohanram
4.8 (5)
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RESTful Java Web Services

RESTful Java Web Services

4.8 (5)
By: Bogunuva Mohanram
Buy this Book

Overview of this book

Representational State Transfer (REST) is a simple yet powerful software architecture style to create lightweight and scalable web services. The RESTful web services use HTTP as the transport protocol and can use any message formats, including XML, JSON(widely used), CSV, and many more, which makes it easily inter-operable across different languages and platforms. This successful book is currently in its 3rd edition and has been used by thousands of developers. It serves as an excellent guide for developing RESTful web services in Java. This book attempts to familiarize the reader with the concepts of REST. It is a pragmatic guide for designing and developing web services using Java APIs for real-life use cases following best practices and for learning to secure REST APIs using OAuth and JWT. Finally, you will learn the role of RESTful web services for future technological advances, be it cloud, IoT or social media. By the end of this book, you will be able to efficiently build robust, scalable, and secure RESTful web services using Java APIs.
Table of Contents (18 chapters)
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Title Page
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Title Page
Credits
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Credits
About the Author
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About the Author
Acknowledgments
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Acknowledgments
About the Reviewer
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About the Reviewer
www.PacktPub.com
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www.PacktPub.com
Customer Feedback
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Customer Feedback
Preface
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Preface
Free Chapter
1
Introducing the REST Architectural Style
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Introducing the REST Architectural Style
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The REST architectural style
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Introducing HTTP
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The evolution of RESTful web services
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The core architectural elements of a RESTful system
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The description and discovery of RESTful web services
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Java tools and frameworks for building RESTful web services
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Summary
2
Java APIs for JSON Processing
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Java APIs for JSON Processing
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A brief overview of JSON
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Processing JSON data
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Using JSR 353 – Java API for processing JSON
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Using the Jackson API for processing JSON
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Using the Gson API for processing JSON
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Java EE 8 enhancements for processing JSON
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Summary
3
Introducing the JAX-RS API
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Introducing the JAX-RS API
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An overview of JAX-RS
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JAX-RS annotations
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Returning additional metadata with responses
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Understanding data binding rules in JAX-RS
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Building your first RESTful web service with JAX-RS
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Client APIs for accessing RESTful web services
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Summary
4
Advanced Features in the JAX-RS APIs
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Advanced Features in the JAX-RS APIs
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Understanding subresources and subresource locators in JAX-RS
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JAX-RS response builder explained
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Exception handling in JAX-RS
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Reporting errors using application exceptions
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Introducing validations in JAX-RS applications
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Supporting custom request-response message formats
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Asynchronous RESTful web services
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Asynchronous RESTful web service client
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Server-sent events
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Managing an HTTP cache in a RESTful web service
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Understanding filters and interceptors in JAX-RS
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Understanding the JAX-RS resource life cycle
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Summary
5
Introducing JAX-RS Implementation Framework Extensions
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Introducing JAX-RS Implementation Framework Extensions
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Jersey framework extensions
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Generating a chunked output using Jersey APIs
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RESTEasy framework extensions
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Summary
6
Securing RESTful Web Services
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Securing RESTful Web Services
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Securing and authenticating web services
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HTTP basic authentication
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HTTP digest authentication
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JWT authentication
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Securing RESTful web services with OAuth
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Authorizing the RESTful web service accesses via the security APIs
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Input validation
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Key considerations for securing RESTful services
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Summary
7
Description and Discovery of RESTful Web Services
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Description and Discovery of RESTful Web Services
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The need for an interface contract
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Web Application Description Language
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RESTful API Modeling Language
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Swagger
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Revisiting the features offered in WADL, RAML, and Swagger
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Summary
8
RESTful API Design Guidelines
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RESTful API Design Guidelines
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Designing RESTful web APIs
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Fine-grained and coarse-grained resource APIs
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Using header parameters for content negotiation
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Multilingual RESTful web API resources
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Representing date and time in RESTful web resources
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Implementing partial response
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Implementing partial update
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Returning modified resources to the caller
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Paging a resource collection
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Implementing search and sort operations
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Versioning RESTful web APIs
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Caching RESTful web API results
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Using HTTP status codes in RESTful web APIs
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Overriding HTTP methods
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Documenting RESTful web APIs
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Asynchronous execution of RESTful web APIs
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Microservice architecture style for RESTful web application
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A quick recap
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Summary
9
The Role of RESTful APIs in Emerging Technologies
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The Role of RESTful APIs in Emerging Technologies
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Cloud services
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Internet of things
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Modern web applications
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Social media
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Using Open Data Protocol with RESTful web APIs
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Summary
10
Useful Features and Techniques
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Useful Features and Techniques
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Tools for building a JAX-RS application
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Integration testing of JAX-RS resources with Arquillian
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Using third-party entity provider frameworks with Jersey
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Packaging and deploying JAX-RS applications
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Summary

JAX-RS response builder explained

The JAX-RS resource methods return type is generally based on the entity being operated on. For example, getDepartment returns the Department type. This return value is wrapped by JAX-RS in the default response message body and response status; additional metadata like content length, media type are added by the default JAX-RS implementation provider, which is not transparent to us. If we intend to explicitly control the response sent back to the client, the resource methods can return an instance of javax.ws.rs.core.Response. The Response class is an abstract class which contains methods required to get access to the different attributes of Response sent back to the client. Listed here are a few key methods of Response class:

Method

Purpose

getCookies

Get cookies set on the response message.

getDate

Get the response message date.

getEntity

Get the response message entity object.

In case of HTTP, this will be the entity object set in the HTTP message body.

getHeaders...

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