Complete Hibernate and Java Persistence API INT2438; 5 Days; Instructor-led

Transcription

1 Complete Hibernate and Java Persistence API INT2438; 5 Days; Instructor-led Course Description This course teaches students the Java specification for persisting objects to the database. It does so through Hibernate - the most popular JPA implementation and object-relational mapping framework for Java environments. Object relational mapping in large enterprise applications is difficult. The task is so difficult that the problem of storing and retrieving objects to a relational database has its own name - impedance mismatch. In this class, students learn object-relational mapping concepts and the various issues and options available in Java to address object persistence. With these fundamentals, the course then explores the basics of JPA/Hibernate object persistence and configuration. It also digs into the details of mapping, queries, transactions, and concurrency. Not just a class that focuses on theory, this course is loaded with practical labs and deals with maintenance and performance issues. After taking this class, developers will be able to build faster, more flexible and easier to maintain application persistence layers and overcome impedance mismatch with JPA implementations like the Hibernate framework. Course Objectives Understand the challenges of mapping objects to relational databases Learn the architecture of Hibernate and JPA Know how to setup and configure Hibernate and/or JPA for a Java project Learn to map Java classes and object associations to relational database tables with JPA and Hibernate annotations Learn to map Java classes and object associations to relational database tables with Hibernate or JPA XML mapping files Study strategies for mapping Java inheritance trees to relational database tables Learn the Hibernate Query Language, Java Persistence Query Language and Criteria for retrieving Java objects Explore how to manage database transactions Look at optimistic and pessimistic concurrency options provided by Hibernate and JPA Audience This class is designed for Java programmers with a need to understand the Java persistence provided by Hibernate or JPA framework and API.

2 Prerequisites Students should have a good understanding of the Java programming language. A basic understanding of relational databases and SQL is very helpful. Course Outline Object Persistence Persistence Object Persistence Object/Relational Paradigms Impedance Mismatch Object Relational Mapping (ORM) Hibernate Why an ORM framework? Why Hibernate? Java Persistence API (JPA) Hibernate Projects Java ORM/Persistent Frameworks Hibernate A Quick Hibernate Example Hibernate Architecture and API Hibernate Installation/Setup Configuration Configuration Properties Mapping Files JPA A Quick JPA Example JPA Architecture and API Hibernate Installation/Setup with JPA Persistence Configuration Mapped Entities and Mapping Files Entity Mapping by Annotation Persistent Classes POJOs JavaBeans Annotation Metadata Annotation Configuration Basic Entity Mapping via Annotations Basic Property Mapping via Annotation ID Mapping via Annotation Composite Keys (and Natural Keys) Access Type Hibernate Mapping Annotations Entity Mapping by XML XML Metadata

3 XML vs. Annotatin - Pros/Cons Hibernate XML Metadata Basics JPA XML Metadata Basics Basic Entity Mapping via XML Basic Property Mapping via XML Hibernate Types ID Mapping via XML Identifier Exposure Access Type Persistence Context Entity Lifecycle New or Transient State Managed or Persistent State Entity Updates and Automatic Dirty Checking Flushing Detached State Detached State - Why? Remove/Delete Object Identifiers Revisited Detached & Merge Revisited Refresh Embeddables and Components Domain Model Entities and Values Embeddables and Components Embeddable by Annotation JPA Embeddable by XML Hibernate Component by XML Component Bidirectional Association Issues and Warnings for Embeddables/Components Embeddable Composite Id Purpose of Embeddables/Components Entity Associations Many-to-one Many-to-One by Annotation Many-to-One by XML mapping Bidirectional Many-to-One Bidirectional Many-to-One by Annotation Bidirectional Many-to-One by XML Other Collection Types Many-to-One List Many-to-One Bag Many-to-One Map

4 More Associations One-to-one One-to-one by Annotation One-to-one by XML Bidirectional One-to-One Bidirectional One-to-One by Annotation Bidirectional One-to-One by XML Many-to-many Many-to-many by Annotation Many-to-many by XML Bidirectional Many-to-Many Bidirectional Many-to-Many with Annotations Bidirectional Many-to-Many with XML Value Type Collections Collections of Value Types Collections of Embeddables/Components Inheritance Inheritance Mapping Strategies Table per Hierarchy Table per Subclass Table per Concrete Class Table per Concrete Class with Mapped Superclass Inheritance Mapping Pros/Cons Polymorphism Table per Concrete Class with Unions Choosing an Inheritance Strategy Cascading/Loading Cascading/Transitive Persistence Lazy Loading Proxies Eager Loading What's a Proxy? Detached Objects and Proxies Polymorphic Associations Revisited Queries Persistent Object Fetching Options Hibernate Query HQL HQL Parameters JPA Query and JPQL Named Queries Native SQL

5 Criteria Criteria Criteria Select Criteria Inner/Outer Joins Criteria Parameters Criteria Where Criteria Order Metamodel Pagination and Query Hints Hibernate Scrolling Query Option Pros/Cons Transactions and Concurrency The Java Transaction Hibernate Transaction Configuration Hibernate Transaction API JPA Transaction Configuration JPA Transaction API Optimistic Locking Versioning Hibernate Optimistic Locking without Versioning Pessimistic Locking API