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Java EE Programming: Enterprise JavaBeans (EJB 3.0) and Java Persistence (JPA)

Dienu skaits: 3
Maksa privātpersonām (bez PVN): 336.00 Ls
Maksa organizācijām (bez PVN): 420.00 Ls

Overview:

This course is introduces you to the Enterprise JavaBeans (EJB 3.0) technology and is ideal for those who have never programmed using EJB. You will learn about the core concepts regarding EJB including why they are important, differences between stateless and stateful sessions, the Java Persistence API, and the JPA Entity Lifecycle using Eclipse. You will also look at the Java Persistence Query Language (JPA QL) and entity relationships.

Prerequisites: This course is intended for intermediate to advanced Java programmers. System architects will find the advanced concepts especially beneficial in designing a framework. Students should have good Java programming knowledge and should be familiar with web application programming, including servlets and JSPs.

Outline:

Java Enterprise Edition (EE) Overview

• Introduction to Java Platform
• Java Community Process (JCP)
• Introduction to Java EE
• Why Move to Java EE
• Java EE - New and Enhanced Features
• Java EE Software Packaging
• Java EE Technologies

Java EE Tools in Eclipse WTP

• Eclipse Platform
• Eclipse Workspace
• Perspectives, Views & Editors
• Basic Operations with Eclipse Views and Perspectives
• The Java Perspective
• The Debug Perspective
• Navigator View
• Package Explorer
• Outline View
• Problems View
• Eclipse Preferences
• Build and Validation
• Code Completion, Templates and Snippets
• Searching
• Configure Compiler Class Path
• JRE Switching
• Eclipse WTP
• Java EE Perspectives
• Project Explorer View
• Servers View
• JPA Tools

Enterprise JavaBeans (EJBs) Overview

• Need for EJBs
• Distributed Computing
• Distributed Transaction
• Distributed Security
• What are EJBs?
• Main Characteristics of EJBs
• EJB Remote Method Call
• EJB Architecture Components
• EJB Client
• EJB JAR File
• EJB Container
• EJB Server
• Enterprise JavaBeans
• Session Beans
• Entity Beans
• Java Persistence API - Entities
• Message-Driven Beans (MDBs)
• EJB Specification

Stateless Session Beans

• Session Beans
• Stateless Session Bean
• Stateless Session Bean Pooling
• Stateful Session Bean
• Annotations
• Stateless Session Bean Components
• JNDI - Overview
• Business Interface Details
• Bean Class Details
• Session Bean Lifecycle
• Stateless Session Bean Lifecycle

Stateful Session Beans

• Stateful Session Bean
• Stateful Session Beans
• Session Bean Lifecycle
• Stateful Session Bean Lifecycle
• Stateful Session Bean Components
• Stateful Session Bean Client
• Removing the Bean

Entities and Java Persistence API

• Data Persistence
• Java Persistence API
• Session Beans Vs Entities
• Entities
• Persisting and Retrieving Data
• Accessing Entities
• EntityManager & Persistence Unit
• Persistence Context
• persistence.xml Hibernate Provider
• persistence.xml Open JPA Provider
• persistence.xml - Toplink
• Entity Instance Lifecycle
• Creating EntityManager in Session EJB
• Creating EntityManager in a Plain Java Class
• Working With the EntityManager Interface
• Transaction Basics

JPA Entity Lifecycle

• Entity Lifecycle
• When is an Entity Managed or Detached?
• Implementing the CRUD Pattern
• Accessing Entities Using Stateless Session Beans
• Inserting Data
• Retrieving Data
• Updating Data
• Deleting Data
• Merging Entities
• Life-Cycle Callbacks
• External Callback Class
• Synchronizing with Databases
• Entity Lookup
• JPAQL (JPA Query Language)

References and Dependency Injection

• Role of References
• EJB Reference Annotations
• Resource Reference Annotations
• Dependency Injection
• Annotation Injection
• Deployment Descriptor Injection
• Class Level References
• Multiple References
• EJB References in Deployment Descriptors
• Resource References in Deployment Descriptors
• Reference Lookup
• EJBContext
• JNDI Lookup with EJBContext
• Overriding Reference Annotations
• Default Reference Name
• Resolving References
• mappedName Attribute
• Overloaded Reference Names
• Reference Best Practices

Java Persistence Query Language (JPA QL)

• JPA Query Language
• Basic JPAQL Syntax
• Simple SELECT Examples
• The SELECT clause
• Reading Data from Code
• The WHERE Clause
• Using JPAQL from Session EJB
• Named Query
• Multiple Named Queries
• Bulk Updates
• Bulk Delete
• Running Native SQL Query
• Native SELECT Query
• Native SQL Delete and Insert
• Named Native Query
• Entity Relationship Overview and One-to-One
• Relationship Between Entities
• Anatomy of a Relationship
• Foreign Key
• Schema
• One-to-One Unidirectional
• Creating Entity Instances
• Traversing the Relationship
• The Cascade Behavior
• One-to-One Bidirectional
• Traversing the Relationship

Complex Entity Relationships

• One-To-Many and Many-To-One
• Many-to-One Unidirectional
• Modeling One-to-Many
• Many-to-Many
• Modeling Many-to-Many
• Unidirectional One-to-Many
• Modeling Unidirectional One-to-Many
• Relationship in JPA QL
• Fetching Optimizations
• Lazy vs. Eager Initialization
• Lazy Initialization
• Problems with Lazy Initialization
• Fetch Join Query

Entity Inheritance

• Inheritance
• Inheritance and Entities
• Inheritance Strategies
• Single Table Per Class Hierarchy
• Pros and Cons
• Table Per Concrete Class
• Table Per Concrete Class: JBoss Warning
• Table Per Concrete Class
• Table Structure: Table Per Concrete Class
• Table Per Concrete Class: Pros and Cons
• Joined Subclasses
• Table Structure: Joined Subclasses
• Joined Subclasses: Pros and Cons
• Which Approach To Use?