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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)
Buy this Book
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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
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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

The description and discovery of RESTful web services

As you may know, WSDL is used for describing the functionality offered by a SOAP web service. For a SOAP web service, this is a widely accepted standard and is supported by many enterprises today. In contrast, there is no such standard for RESTful web services, and you may find different metadata formats used by various enterprises.

However, in general, you may see the following goals in common among all these metadata formats for RESTful APIs, although they differ in their syntax and semantics:

  • Entry points for the service
  • Resource paths for accessing each resource
  • Allowed HTTP methods to access these resources, such as GET, POST, PUT, and DELETE
  • Additional parameters that need to be supplied with these methods, such as pagination parameters, while reading large collections
  • Format types used for representing the request and response body contents such as JSON, XML, and TEXT
  • Status codes and error messages returned by the APIs
  • Human readable documentation for REST APIs, which includes documentation of the request methods, input and output parameters, response codes (success or error), API security, and business logic

Some of the popular metadata formats used for describing REST APIs are Web Application Description Language (WADL), Swagger, RESTful API Modeling Language (RAML), API Blueprint, and WSDL 2.0. 

Note

We will have a more detailed discussion on each of these items in Chapter 7, Description and Discovery of the RESTful Web Services.

End of Section 6
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