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Introduction to Spring 5 and JPA2

Course ID: SPRING5-JPA

This course includes coverage of all the core Spring 5 and JPA 2 capabilities, as well as the integration capabilities provided by Spring. It provides extensive coverage of using Spring and JPA together, as well as using Spring Boot for dependency management and creating JPA-based repositories using Spring Data. All capabilities are practiced via an extensive set of hands-on labs.

Spring 5 provides an evolutionary advance of Spring's powerful capabilities. The course introduces these capabilities, as well as providing guidelines on when and how to use them. It includes coverage of the three main configuration styles: Java-based (@Configuration), annotation-based (@Component), and the traditional XML-based configuration that may still play an important role in existing and new projects. It uses Spring Boot capabilities for dependency management in many of the labs.

The JPA material covers all basic JPA concepts, including mapping persistent classes, and using EntityManager and EntityManagerFactory to access and manipulate persistent entities. Querying with the Java Persistence Query Language (JPQL) is covered in depth, from basic queries to more advanced queries like eager queries using left joins. It also includes coverage of advanced concepts such as collections of value objects, relationships, and inheritance and polymorphic queries.

This course is hands on with labs to reinforce all the important concepts.  It will enable you to build working Spring/JPA applications and give you an understanding of the important concepts and technology in a very short time.

Course Information

Duration: 5 days

Hands-on: Minimum 50% hands-on labs

Supported Platforms: Spring 5, Eclipse, and Tomcat. Can be supported on IBM RAD/WAS, and IntelliJ with advance notice and possible extra charge.

Skills Gained:

Course Details:

Session 1:  Introduction to Spring

  • Overview of Spring Technology
    • Motivation for Spring, Spring Architecture
    • The Spring Framework
  • Spring Introduction
    • Declaring and Managing Beans
    • ApplicationContexts - The Spring Container
    • XML and @Component/@Named Config
  • Dependencies and Dependency Injection (DI)
    • Examining Dependencies
    • Dependency Inversion / Dependency Injection (DI)
    • DI in Spring - XML and @Autowired

Session 2:  Configuration in Depth

  • Java Based Configuration (@Configuration)
    • Overview, @Configuration, @Bean
    • Dependency Injection
    • Resolving Dependencies
  • Integrating Configuration Types
    • XML and @Component Pros/Cons
    • @Configuration Pros/Cons
    • Choosing a Configuration Style
    • Integrating with @Import and <import>
  • Bean Scope and Lifecycle
    • Singleton, Prototype, and Other Scopes
    • Configuring Scope
    • Bean Lifecycle / Callbacks
  • Externalizing Properties
    • Properties Files
    • @PropertySource, property-placeholder
    • Using @Value
    • SpEL
  • Profiles
    • Overview and Configuration
    • Activating Profiles

Session 3:  Spring Boot Overview

  • maven and Spring
  • Spring Boot Structure
  • Spring POMs with Boot Parents
  • Spring Boot Starters
  • Other Capabilities

Session 4:  Spring Testing

  • Testing and JUnit Overview
    • Writing Tests - Test Classes, asserts, Naming Conventions
    • Running Tests - IDE, maven, ...
    • Test Fixtures - setup and teardown
  • Spring TestContext Framework
    • Overview
    • Configuration
    • Running Tests

Session 5: Introduction to Java Persistence API (JPA2)

  • Overview
    • Persistence Layers, Object-Relational Mapping (ORM), JDBC
    • JPA Overview
  • Mapping with JPA
    • Entities and @Entity, ids and @Id,
    • Generated Id Values
    • Basic Mapping Types
  • Persistence Unit and EntityManager
    • Persisting to the DB, the EntityManager API
    • Persistence Units, Config, Persistence Context
    • Retrieving Persistent Entities with find()
  • More About Mappings
    • Default Mappings, @Basic, @Column
    • Field vs. Property Access
    • Temporal (Date/Time) Mappings
    • Java 8 Data/Time Mapping
  • equals() and hashCode()
  • Logging Options (Provider based)

Session 6: Spring/JPA Integration

  • Spring's DataSource Support
  • Managing the EntityManager (EM)
  • LocalContainerEntityManagerFactoryBean and Container-managed EMs
  • JEE and JNDI Lookup of the EM
  • Configuration and Vendor Adaptors
  • Creating a JPA Repository/DAO Bean - @PersistenceUnit, @PersistenceContext

Session 7: JPA Updates and Queries

  • Inserting Updating, and Deleting Entities
  • Querying and JPQL
    • Entity Based Queries, SELECT ,WHERE
    • Query Interface, Executing Queries, Generic Queries (JPA 2)
    • JPQL Operators, Expressions, and Parameters
    • Named Queries
  • Additional Query Capabilities - Projection and Aggregate Query, Embedded Objects

Session 8 Transactions

  • TX Overview and JPA Transactions
  • Spring's Declarative TX Management (REQUIRED, etc.)
  • @Transactional
  • TX Scope and Propagation
  • Pointcut-based Configuration of Transactions

Session 9: The JPA Persistence Lifecycle

  • The Persistence Lifecycle
    • JPA Entity States (New, Managed, Detached, Removed), and Entity State Diagram
    • Persistence Context - Lifespan, Propagation
    • Synchronization to the DB
  • Versioning and Optimistic Locking
    • Overview, Detached Instances
    • Versioning, @Version, Optimistic Locking
  • Lifecycle Callbacks
    • @PrePersist, @PostPersist, etc.
    • Entity Listeners, @EntityListeners

Session 10: Relationships

  • Relationships Overview: Object Relationships, Participants, Roles, Directionality, Cardinality
  • Relationship Mapping
    • Mapping Overview (1-1, 1-N, N-1, N-N)
    • Unidirectional and Bidirectional
    • @ManyToOne, @OneToMany, @ManyToMany, @OneToOne with Table Structures
    • Relationship Inverse - Owning Side
    • Collection Types (List, Set, etc)
    • Cascading, Lazy and Eager Loading
    • Queries Across Relationships (Inner Joins, Outer Joins, Fetch Joins)
  • Entity Inheritance Mapping
    • Overview
    • Single Table, Joined (Table per Subclass), Table per Concrete Class Mappings
    • Pros and Cons of Mapping Strategies

Session 11:  Spring Web Integration

  • Integrating Spring with Java EE Web Apps
    • ContextLoaderListener
    • WebApplicationContext
    • Using Spring beans in Wep app controller logic
  • Open EntityManager in View
    • Lazy Loading Issue in Web Apps
    • Open EntityManager in View Pattern
    • Using Spring's OpenEntityManagerInViewFilter/Interceptor

Session 12: Spring Data Introduction

  • Spring Data Overview
    • Overview and Architecture
    • Configuring Spring Data
    • Repositories and JPA Repositories
    • Using CrudRepository
  • Using Spring Data
    • Naming Conventions for Querying
    • Creating more Complex Queries
    • Query Configuration

    Session 13: Additional Topics

    • Spring 5: Core Updates
    • JPA: Embedded Objects
    • JPA: Compound Primary Keys
    • JPA: Element Collections
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