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All Classes Will Be Held Virtually – Live Online Intertech's Training Division has been successfully instructing professionals through virtual live online training since the advent of the smartboard. It is a proven form and offers the convenience of live questions, group interaction, and labs with an instructor looking over your shoulder. Because of this, we will continue all classes live but virtually, including Agile and Scrum instruction, so businesses and individual’s seeking professional development can keep moving forward during these unexpected times.

Java Persistence API (JPA) Training

Course ID: CAP161
Duration: 4 Days

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Description

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.

 

Bring This Course To You

For groups of 5 or more, let Intertech bring this course to your location. Customized versions tailored towards your objectives are also available.

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Learning Objectives

  • 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 context 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 facades 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. 

Prerequisites

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

 

Course Outline

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

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

Entity Managers

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

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
 

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

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
  • Encapsulation Persistence Logic
  • Facades
  • Range Queries

Lifecycle and Validation

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

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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