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  • Book Overview & Buying Java EE 8 Application Development
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Java EE 8 Application Development

Java EE 8 Application Development

By : David R. Heffelfinger
4.1 (9)
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Java EE 8 Application Development

Java EE 8 Application Development

4.1 (9)
By: David R. Heffelfinger
Buy this Book

Overview of this book

Java EE is an Enterprise Java standard. Applications written to comply with the Java EE specification do not tie developers to a specific vendor; instead they can be deployed to any Java EE compliant application server. With this book, you’ll get all the tools and techniques you need to build robust and scalable applications in Java EE 8. This book covers all the major Java EE 8 APIs including JSF 2.3, Enterprise JavaBeans (EJB) 3.2, Contexts and Dependency Injection (CDI) 2.0, the Java API for WebSockets, JAX-RS 2.1, Servlet 4.0, and more. The book begins by introducing you to Java EE 8 application development and goes on to cover all the major Java EE 8 APIs. It goes beyond the basics to develop Java EE applications that can be deployed to any Java EE 8 compliant application server. It also introduces advanced topics such as JSON-P and JSON-B, the Java APIs for JSON processing, and the Java API for JSON binding. These topics dive deep, explaining how the two APIs (the Model API and the Streaming API) are used to process JSON data. Moving on, we cover additional Java EE APIs, such as the Java API for Websocket and the Java Message Service (JMS), which allows loosely coupled, asynchronous communication. Further on, you’ll discover ways to secure Java EE applications by taking advantage of the new Java EE Security API. Finally, you’ll learn more about the RESTful web service development using the latest JAX-RS 2.1 specification. You’ll also get to know techniques to develop cloud-ready microservices in Java EE.
Table of Contents (15 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
Introduction to Java EE
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Introduction to Java EE
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Introduction to Java EE
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One standard, multiple implementations
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Java EE, J2EE, and the Spring framework
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Summary
2
JavaServer Faces
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JavaServer Faces
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Introducing JSF
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Developing our first JSF application
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Custom data validation
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Customizing JSF's default messages
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Ajax-enabling JSF applications
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JSF HTML5 support
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JSF 2.2 Faces flows
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Injecting JSF artifacts
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JSF WebSocket support
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Additional JSF component libraries
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Summary
3
Object Relational Mapping with the Java Persistence API
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Object Relational Mapping with the Java Persistence API
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The Customer database
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The Java Persistence API
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Final notes
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Summary
4
Enterprise JavaBeans
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Enterprise JavaBeans
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Session beans
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Asynchronous method calls
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Message-driven beans
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Transactions in enterprise JavaBeans
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Enterprise JavaBean life cycles
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EJB timer service
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EJB security
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Summary
5
Contexts and Dependency Injection
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Contexts and Dependency Injection
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Named beans
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Dependency injection
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Qualifiers
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Named bean scopes
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CDI events
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Summary
6
JSON Processing with JSON-P and JSON-B
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JSON Processing with JSON-P and JSON-B
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The JSON-P Model API
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The JSON-P Streaming API
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JSON pointer
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JSON Patch
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Populating Java objects from JSON with JSON-B
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Generating JSON strings from Java objects with JSON-B
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Summary
7
WebSocket
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WebSocket
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Developing a WebSocket server endpoint
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Developing WebSocket clients
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Additional information about the Java API for WebSocket
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Summary
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Java Messaging Service
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Java Messaging Service
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Message queues
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Message topics
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Summary
9
Securing Java EE Applications
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Securing Java EE Applications
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Identity stores
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Authentication mechanisms
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Summary
10
RESTful Web Services with JAX-RS
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RESTful Web Services with JAX-RS
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An introduction to RESTful web services and JAX-RS
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Developing a simple RESTful web service
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Developing a RESTful web service client
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Query and path parameters
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Server-sent events
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Summary
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Microservices Development with Java EE
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Microservices Development with Java EE
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Introduction to microservices
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Microservices and Java EE
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Developing microservices using Java EE
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Summary
12
Web Services with JAX-WS
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Web Services with JAX-WS
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Developing web services with JAX-WS
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Exposing EJBs as web services
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Summary
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Servlet Development and Deployment
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Servlet Development and Deployment
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What is a servlet?
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Request forwarding and response redirection
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Persisting application data across requests
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Passing initialization parameters to a servlet via annotations
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Servlet filters
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Servlet listeners
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Pluggability
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Configuring web applications programmatically
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Asynchronous processing
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HTTP/2 server push support
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Summary
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Configuring and Deploying to GlassFish
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Configuring and Deploying to GlassFish
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Obtaining GlassFish
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Installing GlassFish
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Starting GlassFish
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GlassFish domains
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Setting up database connectivity
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Setting JMS resources
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Summary

Introduction to Java EE

The Java Platform, Enterprise Edition (Java EE) is a collection of API specifications designed to work together when developing server-side, enterprise Java applications. Java EE is a standard; there are multiple implementations of the Java EE specifications. This fact prevents vendor lock-in since code developed against the Java EE specification can be deployed to any Java EE-compliant application server with minimal or no modifications.

Java EE is developed under the Java Community Process (JCP), an organization responsible for the development of Java technology. JCP members include Oracle (the current steward of the Java platform), and the Java community at large.

Java community process

The Java Community Process (JCP) allows interested parties to assist in developing standard technical specification for Java technology. Both companies and individuals can become members of the JCP and contribute to any technical specification they may be interested in. Each Java EE API specification is developed as part of a Java Specification Request (JSR). Each JSR is assigned a unique number. JavaServer Faces (JSF) 2.3 is developed as JSR 372, for instance.

Since Java EE is developed under the JCP, no one company has complete control over the Java EE specification, since, as mentioned before, the JCP is available to the Java community at large, both software vendors and interested individuals.

Different JCP members have different interests, and contribute to different Java EE specifications; the end result is that Java EE is jointly developed by various members of the Java community.

Java EE APIs

As previously mentioned, Java EE is a collection of API specifications designed to work together when developing server-side enterprise Java applications. Java EE 8 APIs include:

  • JavaServer Faces (JSF) 2.3
  • Java Persistence API (JPA) 2.2
  • Enterprise JavaBeans (EJB) 3.2
  • Contexts and Dependency Injection for the Java EE Platform (CDI) 2.0
  • Java API for JSON Processing (JSON-P) 1.1
  • Java API for JSON Binding (JSON-B) 1.0
  • Java API for WebSocket 1.0
  • Java Message Service (JMS) 2.0
  • Java EE Security API 1.0
  • Java API for RESTful Web Services (JAX-RS) 2.1
  • Java API for XML Web Services (JAX-WS) 2.2
  • Servlet 4.0
  • Expression Language (EL) 3.0
  • JavaServer Pages (JSP) 2.3
  • Java Naming and Directory Interface (JNDI) 1.2
  • Java Transaction API (JTA) 1.2
  • Java Transaction Service (JTS) 1.0
  • JavaMail 1.5
  • Java EE Connector Architecture (JCA) 1.7
  • Java Architecture for XML Binding (JAXB) 2.2
  • Java Management Extensions (JMX) 1.2
  • Standard Tag Library for JavaServer Pages (JSTL) 1.2
  • Bean Validation 2.0
  • Managed Beans 1.0
  • Interceptors 1.2
  • Concurrency Utilities for Java EE 1.0
  • Batch Applications for the Java Platform 1.0

The preceding list is a list of specifications, application server vendors or the open source community need to provide implementations for each Java EE API specification. Application server vendors then bundle a set of Java EE API implementations together as part of their application server offerings. Since each implementation is compliant with the corresponding Java EE JSR, code developed against one implementation can run unmodified against any other implementation, avoiding vendor lock-in.

Due to time and space constraints, we won't cover every single Java EE API specification in this book, instead focusing on the most popular Java EE APIs. The following table summarizes the APIs that we will be covering:

Java EE API

Description

JavaServer Faces (JSF) 2.3

JSF is a component library that greatly simplifies the development of web applications.

Java Persistence API (JPA) 2.2

JPA is the Java EE standard Object-Relational Mapping (ORM) API. It makes it easy to interact with relational databases.

Enterprise JavaBeans (EJB) 3.2

EJB's allow us to easily add enterprise features such as transactions and scalability to our Java EE applications.

Contexts and Dependency Injection (CDI) 2.0

CDI allows us to easily define the life cycle of Java objects and provides the ability to easily inject dependencies into Java objects; it also provides a powerful event mechanism.

Java API for JSON Processing (JSON-P) 1.1

JSON-P is an API that allows working with JSON strings in Java.

Java API for JSON Binding (JSON-B) 1.0

JSON-B provides the ability to easily populate Java objects from JSON streams and back.

Java API for WebSocket 1.0

WebSocket is a standard Java EE implementation of the Internet Engineering Task Force (IETF) WebSocket protocol, which allows full duplex communication over a single TCP connection.

Java Message Service (JMS) 2.0

JMS is a standard API that allows Java EE developers to interact with Message Oriented Middleware (MOM).

Java EE Security API 1.0

The Java EE Security API aims to standardize and simplify the task of securing Java EE applications.

Java API for RESTful Web Services (JAX-RS) 2.1

JAX-RS is an API for creating RESTful web services endpoints and clients.
Java API for XML Web Services (JAX-WS) 2.2

JAX-WS is an API that allows the creation of Simple Object Access Protocol (SOAP) web services.

Servlet 4.0

The servlet API is a low-level API used to implement server-side logic in web applications.

 

We will also cover how to develop microservices by leveraging standard Java EE APIs. Microservices are a modern, popular architectural style in which applications are split up into small modules deployed independently, interacting with each other via the network, typically by leveraging RESTful web services.

We should also note that, with the possible exception of the chapter on microservices, each chapter on this book is standalone; feel free to read the chapters in any order.

Now that we have covered the different APIs provided by Java EE, it is worth reiterating that Java EE is a single standard with multiple implementations, some commercial, and some open source.

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