Instructor-led training

The Java Persistence API Training in Manhattan, Kansas

This course offers a comprehensive and detail-oriented treatment of the Java Persistence API (JPA) for developers interested in implementing persistence tiers for enterprise applications.

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What you'll learn

This course offers a comprehensive and detail-oriented treatment of the Java Persistence API (JPA) for developers interested in implementing persistence tiers for enterprise applications. We cover JPA basics including simple object/relational concepts and annotations, persistence contexts and entity managers, and configuration via persistence.xml. We get a good grounding in the Java Persistence Query Language (JPQL) and take advantage of a prepared JPQL query console to explore the two schemas on which the course's case studies are based. The course then moves into advanced topics including JPA-2.0 mapping options, the Criteria API, lifecycle hooks, JSR-303 validation, locking, and caching. Students will complete the course with a firm understanding of JPA architecture and plenty of hands-on exercise in entity mapping, persistence operations, and JPQL. br/ Course software includes two schemas: a fairly simple human-resources model (6 tables, 253 rows) for early chapters and a more sophisticated pharmacy schema (14 tables, 4255 rows) for the latter half of the course. br/ This version of the course supports JPA 2.0 with a choice of two providers: EclipseLink 2.3, which is pre-configured for course exercises, and Hibernate 4.0. Switching providers is just a matter of moving a few lines in and out of XML comments in the relevant persistence.xml file, and we encourage instructors to demonstrate both providers at least here and there, to illustrate portability and for comparison's sake over some finer points. br/ The course also supports either the Derby or Oracle RDBMS. Derby is bundled with the course software and is pre-configured; a script is included to change over to Oracle configurations for all exercises and schema-creation scripts are available for both.

Prerequisites

A strong Java programming background is essential for this course. A strong Java programming background is essential for this course. Prior experience with JDBC will be a plus but is not required.

Course Outline

Chapter 1. Introduction to JPA

Object/Relational Mapping
Mismatches Between Relational and Object Models
The Java Persistence API
JPA History
JPA Architecture
Entity Metadata
The Entity Manager
JPA Providers

Chapter 2. Object/Relational Mapping

Annotations
JavaBean Standards
Property, Field, and Mixed Access
Table and Column Mapping
Primary Keys and Generation
Type Mappings
Temporal and Enumerated Types
Embedded Types
Entity Relationships
@ManyToOne Relationships
@OneToOne Relationships
@OneToMany Relationships
@ManyToMany Relationships
Eager and Lazy Loading

Chapter 3. Entity Managers

Putting Entities to Work
persistence.xml
Entity State and Transitions
Managing Transactions
Persistence Operations
Creating Queries
Named Queries
Query Parameters
Native Queries

Chapter 4. JPQL

The Java Persistence Query Language
Query Structure
Path Expressions
Filtering
Scalar Functions
Operators and Precedence
between, like, in
is null, is empty
Ordering
Aliases
Grouping
Aggregate Functions
Joins
Constructors

Chapter 5. Advanced Mappings

Inheritance Strategies
Single-Table Strategy
Joined-Table Strategy
Table-Per-Concrete-Class Strategy
Querying Over Inheritance Relationships
Secondary Tables
Composite Primary Keys
@IdClass and @EmbeddedId
Derived Identifiers
@ElementCollection
Default Values
@Version Fields
Cascading and Orphan Removal
Detachment and Merging

Chapter 6. The Criteria API

History of the Criteria API
Criteria Query Structure
The MetaModel API and Query Type Safety
Tuples
Joins
Predicates
Building Expressions
Ordering
Grouping
Encapsulating Persistence Logic
Façades
Range Queries

Chapter 7. Lifecycle and Validation

Lifecycle Events
Method Annotations
Entity Listeners
JSR-303 Validation
Constraint Annotations
Validation Modes
Validation Groups

Chapter 8. Locking and Caching

Concurrency
Optimistic Locking
Optimistic Read Locking
Optimistic Write Locking
Pessimistic Locking
Caching
Persistence Context as Transactional Cache
Shared (2nd-level) Cache
Locking and Caching "Do's and Don'ts"

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