Developing Middleware in Java EE 8电子书

Title Page

Copyright and Credits

Developing Middleware in Java EE 8

Dedication

Packt Upsell

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Contributors

About the author

About the reviewer

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Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

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Conventions used

Get in touch

Reviews

Delving into Java EE 8

What is Java EE?

Enterprise applications

Java EE architecture

Chapter roadmap

Contexts and dependency injection

Data persistence

Data validation

Enterprise JavaBeans

RESTful services

JSON processing

Messaging

Mailing

WebSockets

Security

Required software

IDE

Application server

Build tool

Relational database system

Book project

Goodbye Java EE, welcome Jakarta EE!

Summary

Dependency Injection Using CDI 2.0

What's new in CDI 2.0?

Creating your first CDI bean

First CDI bean

Providing alternative implementations to your bean

Using qualifiers

Specifying a bean scope

Injecting beans

Direct field injection

Bean constructor parameter injection

Initializer method parameter injection

Using producers

Scope of producer methods

Injection into the producer methods

Using interceptors

Interceptor types

Using events

Summary

Accessing the Database with JPA 2.1

What's new in JPA 2.2?

Architecture

Writing your first JPA application

Step 1: Creating a data source

Step 2: Creating a persistence unit

Step 3: Creating an entity class

Step 4: Creating a data access object

Entities

Entity mapping

Primary keys

Table mapping

Column mapping

Date and time mapping

Ignoring properties

Composite primary keys

Embedded objects

Performing CRUD operations

Managed versus detached entities

Inserting a new record

Retrieving an existing record

Updating an existing record

Deleting a record

Detaching an entity

Mapping entity relationships

Many-to-one relationships

Many-to-many relationships

Bidirectional relationships

Cascading

Map collections of primitives

JPA query language

Basic syntax

Query parameters

Named parameters

Positional parameters

Query examples

Selecting entities

Ordering entities

Limiting records

Selecting entities with clauses

Selecting entities with projection

Eliminating duplicates

Entity navigation

Update entities

DELETE entities

Using native SQL queries

Named queries

Criteria queries

Mapping inheritance

Single table strategy

Joined table strategy

Table per class strategy

Comparing strategies

Polymorphic queries

Summary

Validating Data with Bean Validation 2.0

What's new in Bean Validation 2.0?

First validation example

First approach – programmatic validation

Second approach – auto validation

Injecting the validator object

Graph validation

List of available constraints

Validating parameters and return values

Defining a custom constraint

Associating messages with attributes

Adding more constraints

Summary

Exposing Web Services with JAX-RS 2.1

What are web services?

RESTful versus SOAP services

SOAP services

RESTful services

Understanding HTTP

Basics

HTTP request

HTTP response

Writing your first REST service

Writing a resource class

Configuring a project for Jersey

Testing your web services

Postman as a test tool

Handling HTTP methods

Sub-resources

Receiving parameters

Query parameters

Matrix parameters

Path parameters

Form parameters

Header parameters

Providing default values

Bean parameters

Using context objects

Handling JSON

Enabling Moxy

Returning JSON

Consuming JSON

Custom responses

Uploading files

Handling exceptions

Declaring custom web application exceptions

Mapping existing exceptions

Server-sent events

Summary

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

Communicating with Different Systems with JMS 2.0

Message-Oriented Middleware

Java Messaging System (JMS)

Architecture

JMS provider

JMS clients

Messages

Administered objects

Messaging styles

Point-to-point style

Publish-subscribe

First JMS application

Creating administered objects

Creating a destination

Creating a connection factory

Creating the producer

Creating the consumer

Using JMS resources with annotations

Creating connection factories

Creating destinations

Injecting connection factories

Injecting destinations

Putting them all together

Message-Driven Beans

Creating a message-driven bean

Sending and receiving messages

Text messages

Map messages

Object messages

Summary

Sending Mails with JavaMail 1.6

Explaining mail protocols

POP3 and IMAP

SMTP

Sending an email

Sending an HTML email message

Setting To, CC, and BCC fields

Sending an email with attachments

Summary

Securing an Application with Java Security 1.0

Terminology

Authentication mechanism

Caller

Caller principal

Identity store

Basic login example

Creating a web page to protect

Mentioning who's allowed to access the web page

Defining users and associated roles in a database

Mapping security configuration to the user database

Identity stores

Database identity store

LDAP identity store

Custom identity store

Creating a custom identity store class

Creating an HTTP authentication mechanism

Security context

Authentication mechanisms

Basic authentication

Form authentication

Summary

Making Interactive Applications with WebSockets 1.1

Understanding WebSockets

How does WebSockets work?

Sending and receiving messages

Creating an endpoint

Creating a client web page

Lifecycle events

Accepting path parameters

Maintaining user state

Using encoders

Seat-booking application

Designing and implementing the backend

Designing and implementing the frontend

Summary

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