Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
RESTful Java Web Services
RESTful Java Web Services

RESTful Java Web Services: A pragmatic guide to designing and building RESTful APIs using Java , Third Edition

eBook
$27.98 $39.99
Paperback
$48.99
Subscription
Free Trial
Renews at $19.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Table of content icon View table of contents Preview book icon Preview Book

RESTful Java Web Services

Java APIs for JSON Processing

In the previous chapter, you were introduced to the REST architectural style. Remember that REST does not prescribe any specific message format for client-server communication. One can use an appropriate format for representing messages as long as the chosen format is supported by HTTP. XML and JSON are the two popular formats used by RESTful web services today. Within these two formats, JSON is widely adopted by many vendors because of its simplicity and light weight. In this chapter, you will learn more about the JSON message format, how to represent real-life business data in the JSON format, and various processing tools and frameworks related to JSON.

The following topics are covered in this chapter:

  • A brief overview of JSON
  • Using the JSR 353 – Java API for processing JSON
  • Using the Jackson API for processing JSON
  • Using the Gson API for...

A brief overview of JSON

JSON is a lightweight, text-based, platform-neutral data interchange format in which objects are represented in the attribute-value pair format. Historically, JSON originated from JavaScript. However, nowadays, it is considered to be a language-independent format because of its wide adoption by all modern programming languages. In this section, you will learn the basics of the JSON format.

Understanding the JSON data syntax

The JSON format is very simple by design. It is represented by the following two data structures:

  • An unordered collection of the name-value pairs (representing an object):
    • Attributes of an object and their values are represented in the name-value pair format; the name and the...

Processing JSON data

If you use Java RESTful web service frameworks, such as JAX-RS, for building RESTful web APIs, the serialization and deserialization of the request and response messages will be taken care of by the framework. However, understanding the JSON structure and tools for processing JSON will definitely help you when the default offering by the framework does not meet your requirements. The following diagram illustrates the role of the JSON marshalling (converting Java object to JSON format) and unmarshalling components (converting JSON format to Java Object) in a typical Java RESTful web service implementation:

This section will teach you the various processing models for JSON data. By the term processing, we mean reading, writing, querying, and modifying JSON data. Two widely adopted programming models for processing JSON are as follows:

  • Object model: In this...

Using JSR 353 – Java API for processing JSON

There are many Java-based frameworks available today for processing JSON. In this section, we will learn the APIs available in the Java EE platform for processing JSON. Java EE 7 has standardized the JSON processing APIs with Java Specification Request (JSR), that is, JSR 353 – Java API for JSON Processing. This JSR offers portable APIs to parse, generate, transform, and query the JSON data. The JSR 353 APIs can be classified into two categories on the basis of the processing model followed by the APIs:

  • Object model API
  • Streaming model API

We had a generic discussion on these two processing models in the previous section, Processing JSON data. In this section, we will see how these processing models are implemented in JSR 353.

...

Using the Jackson API for processing JSON

Jackson is a multipurpose data processing Java library. The primary capability of this tool is the support for processing JSON. It also has additional modules for processing the data encoded in other popular formats, such as Apache Avro (a data serialization system), Concise Binary Object Representation (CBOR), a binary JSON format, Smile (a binary JSON format), XML, comma-separated values (CSV), and YAML. In this section, you will learn how to use Jackson APIs to process JSON.

Jackson provides the following three methods for processing JSON:

  • Tree model APIs: This method provides APIs for building a tree representation of a JSON document
  • Data binding API: This method provides APIs for converting a JSON document into and from Java objects
  • Streaming API: This method provides streaming APIs for reading and writing a JSON document

We will...

Using the Gson API for processing JSON

Gson is an open source Java library that can be used for converting Java objects into JSON representations and vice versa. The Gson library was originally developed by Google for its internal use and later open sourced under the terms of Apache License 2.0.

To learn the dependencies of Gson APIs, refer to https://github.com/google/gson/blob/master/UserGuide.md#TOC-Gson-With-Maven.

Processing JSON with object model APIs in Gson

The main class in the Gson library that you will use for building an object model from the JSON data is the com.google.gson.Gson class. Here is a list of the core Gson classes from the object model API category:

Class

Description

com.google.gson.GsonBuilder...

Java EE 8 enhancements for processing JSON

While Java EE8 is on its way and expected by the end of 2017, one of the most-awaited enhancement in Java EE 8 is related to JSON processing, covered by JSR 374 – Java API for JSON Processing 1.1.

With JSON becoming widely used in service-oriented patterns (such as reusable contract and lightweight endpoint), another key feature planned in Java EE8 is the JSR 367 Java API for JSON Binding (JSON-B). Similar to GSON, JSR 367 brings in the capability of marshalling/unmarshalling Java objects to JSON representation. JSON-B will be the standard binding layer for converting Java objects to/from JSON messages, similar to JAXB for XML binding.

Service-oriented patterns cover a variety of design patterns used to address the pain points that inhibit adopting Service-oriented principles. For example, reusable contract pattern avoids tight...

Summary

In this chapter, you were introduced to the various processing models for the JSON content and some of the popular Java-based JSON processing frameworks available today. We also explored the upcoming enhancements for processing JSON in Java EE8. This chapter is essential for understanding how the JSON-based request and response messages are bound to the Java model while building REST APIs later in the book.

This chapter is not meant to recommend any specific JSON framework for your application but to help you understand the popular frameworks available today for processing JSON, and their offerings in general.

In the next chapter, we will build our first REST service by using JAX-RS APIs.

Left arrow icon Right arrow icon

Key benefits

  • Build efficient and secure RESTful web APIs in Java..
  • Design solutions to produce, consume and visualize RESTful web services using WADL, RAML, and Swagger
  • Familiarize the role of RESTful APIs usage in emerging technology trends like Cloud, IoT, Social Media.

Description

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.

Who is this book for?

If you are a web developer with a basic understanding of the REST concepts and envisage to get acquainted with the idea of designing and developing RESTful web services, this is the book for you. As all the code samples for the book are written in Java, proficiency in Java is a must.

What you will learn

  • Introduce yourself to the RESTful software architectural style and the REST API design principles
  • Make use of the JSR 353 API, JSR 374 API, JSR 367 API and Jackson API for JSON processing
  • Build portable RESTful web APIs, making use of the JAX-RS 2.1 API
  • Simplify API development using the Jersey and RESTEasy extension APIs
  • Secure your RESTful web services with various authentication and authorization mechanisms
  • Get to grips with the various metadata solutions to describe, produce, and consume RESTful web services
  • Understand the design and coding guidelines to build well-performing RESTful APIs
  • See how the role of RESTful web services changes with emerging technologies and trends
Estimated delivery fee Deliver to Argentina

Standard delivery 10 - 13 business days

$12.95

Premium delivery 3 - 6 business days

$40.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Nov 17, 2017
Length: 420 pages
Edition : 3rd
Language : English
ISBN-13 : 9781788294041
Languages :
Concepts :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Estimated delivery fee Deliver to Argentina

Standard delivery 10 - 13 business days

$12.95

Premium delivery 3 - 6 business days

$40.95
(Includes tracking information)

Product Details

Publication date : Nov 17, 2017
Length: 420 pages
Edition : 3rd
Language : English
ISBN-13 : 9781788294041
Languages :
Concepts :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
$19.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
$199.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just $5 each
Feature tick icon Exclusive print discounts
$279.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just $5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total $ 152.97
RESTful Java Web Services
$48.99
Mastering Microservices with Java 9
$48.99
Architecting Modern Java EE Applications
$54.99
Total $ 152.97 Stars icon

Table of Contents

10 Chapters
Introducing the REST Architectural Style Chevron down icon Chevron up icon
Java APIs for JSON Processing Chevron down icon Chevron up icon
Introducing the JAX-RS API Chevron down icon Chevron up icon
Advanced Features in the JAX-RS APIs Chevron down icon Chevron up icon
Introducing JAX-RS Implementation Framework Extensions Chevron down icon Chevron up icon
Securing RESTful Web Services Chevron down icon Chevron up icon
Description and Discovery of RESTful Web Services Chevron down icon Chevron up icon
RESTful API Design Guidelines Chevron down icon Chevron up icon
The Role of RESTful APIs in Emerging Technologies Chevron down icon Chevron up icon
Useful Features and Techniques Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.8
(5 Ratings)
5 star 80%
4 star 20%
3 star 0%
2 star 0%
1 star 0%
Simone Jan 15, 2021
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
È un ottimo libro per ripassare il protocollo http, servlet ecc. Come sappiamo rest è solo un derivato da questo e quindi risulta molto semplice da comprendere anche per come è spiegato. Possiamo trovare anche riferimenti alle varie librerie utilizzabili per la trasformazione in jspn come gson. Siccome molte aziende seguono la moda, forse sarebbe stato meglio optare per un libro su springboot anche se io personalmente trovo quest'ultimo un modo ulteriore per complicarsi la vita (visto anche tutti i framework che poi devi utilizzare per farlo girare bene).Tralasciando il mio divagare in questioni professionali, ho trovato questo libro molto utile per creare servizi in puro java! Consigliatissimo.
Amazon Verified review Amazon
Joanna Rybak Nov 22, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
good book for a reasonable price
Amazon Verified review Amazon
Paulo Diaz Dec 01, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Excelente libro para desarrollar Servicios Web basadas en Java
Amazon Verified review Amazon
hegp Aug 29, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
none
Amazon Verified review Amazon
Claveman Jan 12, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Up to date and well organized. I found this book a nice respite after getting a headache from reading dozens of fragmented, overlapping web articles, blogs, videos, and other material on the web. This is just a great reference on web services to have on your desk. For only a few bucks more you can have the searchable Kindle edition as well.
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela