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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

Java EE Web Container Security

Because an EJB is typically invoked from the web-tier by a servlet, JSP page or JSF component, we will briefly mention Java EE web container security. The web-tier and EJB tier share the same security model. So the web-tier security model is based on the same concepts of principals, roles and realms.

Web-Tier Authorization

Web-tier authorization is similar to EJB authorization but with a few differences. Both programmatic and declarative authorization is supported for the web-tier. For programmatic authorization, the EJB methods of getCallerPrincipal() and isCallerInRole() have their equivalents of getUserPrincipal() and isUserInRole() in the HttpServletRequest interface. These methods would then be used in a servlet or JSP page. To use these methods we would need to add the @DeclareRoles annotation or the <security-role> deployment descriptor element as with EJBs. The @RunAs annotation can also be used at servlet class level to specify that a servlet...

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EJB 3 Developer Guide
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