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  • Developing Middleware in Java EE 8
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Developing Middleware in Java EE 8

Developing Middleware in Java EE 8

By : Abdalla Mahmoud
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Developing Middleware in Java EE 8

Developing Middleware in Java EE 8

By: Abdalla Mahmoud

Overview of this book

Middleware is the infrastructure in software based applications that enables businesses to solve problems, operate more efficiently, and make money. As the use of middleware extends beyond a single application, the importance of having it written by experts increases substantially. This book will help you become an expert in developing middleware for a variety of applications. The book starts off by exploring the latest Java EE 8 APIs with newer features and managing dependencies with CDI 2.0. You will learn to implement object-to-relational mapping using JPA 2.1 and validate data using bean validation. You will also work with different types of EJB to develop business logic, and with design RESTful APIs by utilizing different HTTP methods and activating JAX-RS features in enterprise applications. You will learn to secure your middleware with Java Security 1.0 and implement various authentication techniques, such as OAuth authentication. In the concluding chapters, you will use various test technologies, such as JUnit and Mockito, to test applications, and Docker to deploy your enterprise applications. By the end of the book, you will be proficient in developing robust, effective, and distributed middleware for your business.
Table of Contents (12 chapters)
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Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Delving into Java EE 8
Delving into Java EE 8
What is Java EE?
Chapter roadmap
Required software
Book project
Goodbye Java EE, welcome Jakarta EE!
Summary
2
Dependency Injection Using CDI 2.0
Dependency Injection Using CDI 2.0
What's new in CDI 2.0?
Creating your first CDI bean
Providing alternative implementations to your bean
Specifying a bean scope
Injecting beans
Using producers
Using interceptors
Using events
Summary
3
Accessing the Database with JPA 2.1
Accessing the Database with JPA 2.1
What's new in JPA 2.2?
Entities
Performing CRUD operations
Mapping entity relationships
Map collections of primitives
JPA query language
Using native SQL queries
Named queries
Criteria queries
Mapping inheritance
Summary
4
Validating Data with Bean Validation 2.0
Validating Data with Bean Validation 2.0
What's new in Bean Validation 2.0?
First validation example
Injecting the validator object
Graph validation
List of available constraints
Validating parameters and return values
Defining a custom constraint
Summary
5
Exposing Web Services with JAX-RS 2.1
Exposing Web Services with JAX-RS 2.1
What are web services?
RESTful versus SOAP services
Understanding HTTP
Writing your first REST service
Handling HTTP methods
Sub-resources
Receiving parameters
Handling JSON
Custom responses
Uploading files
Handling exceptions
Server-sent events
Summary
6
Manipulating JSON with JSON-B 1.0
Manipulating JSON with JSON-B 1.0
Why JSON?
Mapping objects
Mapping collections
Formatting output
Customizing property names
Customizing naming strategies
Customizing property ordering
Ignoring properties
Handling nulls
Formatting dates and numbers
Using binary
Summary
7
Communicating with Different Systems with JMS 2.0
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Communicating with Different Systems with JMS 2.0
Message-Oriented Middleware
Java Messaging System (JMS)
First JMS application
Using JMS resources with annotations
Message-Driven Beans
Summary
8
Sending Mails with JavaMail 1.6
Sending Mails with JavaMail 1.6
Explaining mail protocols
Sending an email
Sending an HTML email message
Setting To, CC, and BCC fields
Sending an email with attachments
Summary
9
Securing an Application with Java Security 1.0
Securing an Application with Java Security 1.0
Terminology
Basic login example
Identity stores
Security context
Authentication mechanisms
Summary
10
Making Interactive Applications with WebSockets 1.1
Making Interactive Applications with WebSockets 1.1
Understanding WebSockets 
How does WebSockets work?
Sending and receiving messages
Lifecycle events
Accepting path parameters
Maintaining user state
Using encoders
Seat-booking application
Summary
11
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Communicating with Different Systems with JMS 2.0

In this chapter, we are going to discuss the Java Messaging System (JMS) 2.0 API, which provides a full-featured implementation of Message-oriented middleware (MOM) in Java. If you are new to the message-oriented middleware concept, or have never used one of them before, don't worry; we are going to explain the basic concepts of messaging and JMS in the next sections.

You will learn how to use JMS 2.0 to send messages from any Java EE component to be consumed by Message-driven beans (MDB) asynchronously and concurrently. Note that the concept of messaging here is completely different from emails; emails are meant for communication between two or more persons, while messages in MOM are meant for communication between two or more software components. Emails contain some arbitrary information to be read by humans, while...

End of Section 1
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