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  • Book Overview & Buying EJB 3 Developer Guide
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EJB 3 Developer Guide

EJB 3 Developer Guide

By : Michael Sikora
4.2 (6)
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EJB 3 Developer Guide

EJB 3 Developer Guide

4.2 (6)
By: Michael Sikora
Buy this Book

Overview of this book

Table of Contents (18 chapters)
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EJB 3 Developer Guide
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EJB 3 Developer Guide
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Introduction to the EJB 3 Architecture
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Introduction to the EJB 3 Architecture
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Introduction to the Java EE Architecture
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The EJB 3 Architecture
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Getting Started
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Summary
2
Session Beans
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Session Beans
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Introduction
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Stateless Session Beans
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Stateful Session Beans
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Local Interfaces
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Summary
3
Entities
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Entities
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Introduction
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EJB 3 Entities
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Introducing the EntityManager
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Packaging and Deploying Entities
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Field-Based Annotations
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Generating Primary Keys
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Overriding Metadata Defaults
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Summary
4
Object/Relational Mapping
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Object/Relational Mapping
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O/R Mapping Default Behavior
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O/R Mapping Overriding Defaults
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O/R Mapping Additional Annotations
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O/R Inheritance Mapping
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Summary
5
The Java Persistence Query Language
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The Java Persistence Query Language
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Introduction
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Simple Queries
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Projection
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Conditional Expressions
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Aggregate Functions
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Queries with Relationships
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Joins
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Collection Comparison Expressions
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Constructor Expressions
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SubQueries
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Functions
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Queries with Parameters
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Named Queries
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Handling Date and Time
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Bulk Update and Delete
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Native SQL
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Summary
6
Entity Manager
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Entity Manager
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Application-managed Entity Manager
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Entity Manager Merge
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Entity Manager Methods
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Cascade Operations
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Extended Persistence Context
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Entity LifeCycle Callback Methods
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Summary
7
Transactions
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Transactions
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Introduction
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Container-Managed Transaction Demarcation
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Examples of Transaction Attributes
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Controlling Container Managed Transactions
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Concurrency and Database Locking
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UserTransaction Interface
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Summary
8
Messaging
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Messaging
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Introduction
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Java Message Service (JMS) API
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Queue Producer and Consumer Examples
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Topic Producer and Consumer Examples
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Motivation for Message-Driven Beans
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A Simple Message-Driven Bean Example
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MDB Activation Configuration Properties
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MessageDrivenContext
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MDB LifeCycle
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MDB Example Revisited
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Sending Message Confirmation to a Client
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MDBs and Transactions
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Summary
9
EJB Timer Service
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EJB Timer Service
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Introduction
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Timer Service Examples
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A Timer Interface Example
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Timers and Transactions
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Summary
10
Interceptors
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Interceptors
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Interceptor Methods
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Interceptor Classes
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Default Interceptors
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Interceptor Communication
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Summary
11
Implementing EJB 3 Web Services
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Implementing EJB 3 Web Services
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Overview of Web Service Concepts
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Creating a Java Application Web Service
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Overriding JAX-WS Annotation Defaults
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Deploying an EJB Session Bean as a Web Service
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Summary
12
EJB 3 Security
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EJB 3 Security
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Java EE Container Security
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Authentication
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EJB Authorization
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Java EE Web Container Security
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Summary
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Annotations and Their Corresponding Packages
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Annotations and Their Corresponding Packages

Sending Message Confirmation to a Client

We have already seen how an EJB container acknowledges message receipt with the JMS server. In this section we look at how a message producer client can be informed that its message has been received by an MDB.

This is done by the client setting the JMSReplyTo attribute with the message. JMSReplyTo contains the destination, queue or topic, to which the MDB should send its confirmation message. The MDB uses the ObjectMessage.getJMSReplyTo() method to obtain the confirmation destination. The MDB then acts as a message producer to send a message to the confirmation destination.

We will look at the example we have used throughout this chapter. Instead of using a session bean to send a JMS message to an MDB, we will use a Java application program. Recall that a session bean cannot act as a JMS message consumer. The Java application program, TopicProducer, will act both as a topic producer and a synchronous queue consumer. The code for TopicProducer is...

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