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JPA with Hibernate
Version 2.0
Java Training Overview

This course offers a comprehensive and detail-oriented treatment of Hibernate® 4.0 and the Java Persistence API (JPA) 2.0 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.

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. The pharmacy schema is based on an open-source project and made available to Capstone Courseware by special permission.

The course 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.

Java Training Prerequisites

  • A strong Java programming background is essential for this course
  • Knowledge of relational database concepts and SQL is recommended -- but is not strictly required.
  • Prior experience with JDBC will be a plus but is not required.
Java Training Learning Objectives

After completing this course, the student should be able to:

  • Understand the value of object/relational mapping and JPA's role as a standard for ORM implementations.
  • Develop JPA entities using JPA annotations to align the Java classes, properties, and types to relational tables, columns, and types.
  • Create entity managers and instantiate persistence contexts to perform persistence operations.
  • Carry out create/retrieve/update/delete (CRUD) operations on JPA entities using entity managers.
  • Implement entity relationships of all cardinalities, including unidirectional and bidirectional relationships.
  • Implement special ORM cases such as composite primary keys, inheritance relationships, and cascading operations.
  • Use JPQL to write object-oriented queries, and process query results.
  • Use the Criteria API to define queries programmatically, and take advantage of type safety using the Metamodel API.
  • Build reusable façades that encapsulate simpler and more complex persistence operations.
  • Implement persistence lifecycle event handlers.
  • Define JSR-303 validation constraints on JPA entities and see them enforced by the JPA provider.
  • Make well-informed decisions about locking strategies, and understand the role of the JPA cache in enterprise applications.
Java Training Course duration

4 Days

Java Training Course outline

Chapter 1. Introduction to JPA
  • Object/Relational Mapping
  • Mismatches Between Relational and Object Models
  • The Java Persistence API
  • Hibernate
  • History
  • Architecture
  • Entity Metadata
  • The Entity Manager
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
  • HQL and JPQL
  • 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
  • Type Identification with .class
  • Secondary Tables
  • Composite Primary Keys
  • @IdClass and @EmbeddedId
  • Derived Identifiers
  • @ElementCollection
  • Default Values
  • @Version Fields
  • Cascading and Orphan Removal
  • Detachment and Merging
  • Hibernate Extensions
  • The @Type Annotation
Chapter 6. The Criteria API
  • History of the Criteria API
  • Criteria Query Structure
  • The MetaModel API and Query Type Safety
  • The Hibernate Metamodel Generator
  • 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
  • The Hibernate Validator
  • 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"
System Requirements

Minimum Hardware Requirements
  • Dual-core 1.8 GHz, 4 gig RAM, 10 gig disk space.
Hardware – recommended

  • Dual-core 2.8 GHz, 8 gig RAM, 10 gig disk space.
Operating system
  • Tested on Windows 7. Course software should be viable on all systems which support a Java 6 Developer's Kit.
Network and Security

Limited privileges required

Software

All free downloadable tools, with an option to use certain commercial products.


 
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