Java: Fast Track to Hibernate 3 Developers Workshop Course

Topics covered on the 3 day Java: Fast Track to Hibernate 3 Developers Workshop course

Hibernate Overview

• The Issues with Persistence Layers
• Object-Relational Mapping (ORM) Issues
• Issues with JDBC Alone
• Hibernate Overview
• Hibernate Benefits
• Hibernate Environments
• Hibernate Architecture
• More Detailed Architecture

Using Hibernate

• Acquiring Hibernate
• Using Hibernate
• Configuring Hibernate
• hibernate.cfg.xml Elements
• SessionFactory Configuration
• SessionFactory Configuration Properties
• The Configuration Class
• The SessionFactory Interface
• SessionFactory API
• The Session Interface
• Sessions and Transactions

Mapping a Simple Class

• Persistent Entity Classes
• Persistent Classes
• The Event Class
• The id Property
• The Hibernate Mapping File
• The Element
• The Element
• The EVENTS Table
• Mapping the id Property with
• More About Primary Keys
• Generating the id Value
• Mapping Properties with
• Hibernate Mapping Types
• Common Hibernate Type Mappings
• Filed Access or Property Access
• The Mapping File
• Hibernate Sessions
• The Session Interface
• Retrieving Persistent Objects

Logging

• Hibernate.show_sql
• Apache Log4J
• Hibernate log4j.properties File
• The log4j.properties File
• Modifying log4j.properties for Hibernate
• Hibernate Logging Categories

Appendix – Log4J

• Apache Log4J
• log4j Loggers
• Logger Hierarchy
• Logger Levels
• Appenders
• Aprender Additivity
• Layout
• log4j Configuration File
• PatternLayout
• Multiple Layouts
• Some log4j Appenders

Inserting and Updating

• Inserting Instances
• Modifying a Persistent Instance
• Deleting an Instance

Querying and Hibernate Query Language (HQL)

• Hibernate Query Language
• HQL Basics
• Executing a Query
• Other Common Query Methods
• Where Clause/Restriction
• HQL Operators and Expressions
• Query Parameters
• Using Query Parameters
• Named Queries
• Projection Queries
• Projection Queries Returning Tuples
• Additional Query Capabilities
• Aggregate Functions

Transaction Definition

• Transaction Lifecycle
• Transactions Modularize Systems
• Transactions Clarify Systems

Hibernate and Transactions

• Hibernate Transaction Demarcation
• Working with Transactions
• The Hibernate Transaction API
• Working in a Managed Environment

The Persistence Lifecycle

• Hibernate Object States
• Transient and Persistent State
• Detached and Removed State
• Hibernate Object States and Transitions
• The Persistence Context
• Session/Persistence Context Lifespan
• Session-per-Request
• Session Propagation
• First – Acquiring a SessionFactory Instance
• Contextual Session
• Using Contextual Sessions
• What is the “Current” Context
• Contextual Session Scope
• The Persistence Context as Cache
• Synchronization to the Database
• Flushing the Session
• Persistence Context and Object Identity
• Yes, It’s Complicated

Versioning and Optimistic Locking

• Detached Objects and Optimistic Locking
• Using a Detached Instance
• Optimistic Locking and Versioning
• Version Property in Java Class
• Version Element in Mapping File
• Automatic Version Maintenance
• Updating a Detached Instance
• session.saveorupdate()
• The unsaved-value Attribute
• Locking Objects
• Lock Modes

Relationships Overview

• Object Relationships
• Characteristics of Relationships
• Directionality
• Characteristics of Relationships

Collections of Value Objects

• Collections of Values
• Modeling a Set of Values
• Mapping the Set of Values
• Using a Set of Values
• More on the Java Collection Type
• Using the Java Collection Types
• Modeling a List of Values
• Mapping a List of Values
• Sorted and Ordered Collections
• Collections of Components
• Mapping Collections of Components

Mapping Entity Relationships

• Unidirectional Many-To-One Relationship
• The Table Structure – Many-To-One
• Mapping the Relationship
• Using the Relationship
• Bidirectional One-To-Many Relationship
• Defining the One-To-Many Relationship
• Mapping the One-To-Many Relationship
• More on the Inverse Side
• Cascading Operations
• Transitive Persistence
• The Cascade Attribute
• Cascade Choices
• Choosing Cascade Options
• Bidirectional One-To-One Relationship
• Mapping a One-To-One Relationship
• Many-To-Many Relationship
• Defining Many-To-Many Relationship
• Mapping Many-To-Many Relationship
• Lazy and Eager Loading
• Queries Across Relationships
• OUTER and FETCH JOIN

Mapping Inheritance

• Inheritance
• Entity Inheritance
• Details of Entity Inheritance
• Single-Table Strategy
• Class Definitions for Single-Table
• Mapping for Single-Table
• Single-Table: Pros and Cons
• Table per Subclass (Joined Subclass)
• Mapping for Table per Subclass
• Joined: Pros and Cons
• Table per Concrete Class

More on Querying

• Projection Queries
• Aggregate Queries
• Bulk Update and Delete
• Executing Bulk Operations
• Native SQL Queries
• Refining SQL Queries
• Retrieving Entities with SQL Queries

Filters

• Hibernate Filters
• Defining and Attaching Filters
• Using a Filter
• Mapping a Filter to a Set
• Collection Filters

Criteria

• Restrictions – Narrowing the Result Set
• Restrictions Methods
• Navigating Associations
• Eager Fetching
• Query by Example
• Refining the Example
• Additional Capabilities

JPA Overview

• Java Persistence API Overview
• Java Persistence Environments
• Hibernate and JPA

Mapping a Simple Class

• Entity Classes
• Event Entity Mapped with JPA
• The Entity Declaration
• The Event Class
• The id Property
• Mapping Properties
• Basic Mapping Types

Entity Manager and Persistence Context

• The Entity Manager & Persistence Context
• Persistence Unit
• persistence.xml
• Acquiring an EntityManager
• Working with Transactions
• Retrieving Persistent Objects

Inserts and Queries

• Persisting a New Entity
• Java Persistence Query Language
• Executing a Query
• WHERE Clause and Query Parameters
• Named Queries
• Version Property in Java Class
• Versioned Class and Detached Objects

Relationships

• JPA Support for Relationships
• Mapping the Many-To-One Relationship
• Mapping the One-To-Many Relationship
• Loading and Cascading
• Queries Across Relationships
• Inheritance
• Entity Definitions for Single-Table
• Entity Definitions for Joined

Components and Multi-Table Mapping

• Component Overview
• Mapping a Component
• Multi-Table Mapping

equals() and hashCode()

• Defining equals() and hashCode()
• Redefining equals()

Caching

• Second-Level Cache
• Data Appropriate for Caching
• Cache Providers
• Configuring Caching
• Concurrency Strategies
• Managing the Caches

Design Considerations

• Long Conversations
• Session-per-Conversation
• Problems with Web Applications
• Open Session in View Pattern
• Query Efficiency Techniques
• Beware of N+1 Select Issue
• Prefetching Data in Batches
• Data Access Object (DAO)

Hibernate Toolset

• Hibernate Tools Overview
• Important Note on Versions
• Optional – Hibernate Tools
• Install Hibernate Tools
• Hibernate Console Configuration
• Hibernate Console Perspective
• Hibernate Configuration View
• Class Diagram
• HQL Editor
• Query Results
• Properties View
• SQL Preview
• Other Capabilities