Java EE 6: Develop Database Applications with JPA

Java EE 6: Develop Database Applications with JPA

Dauer: 4 Tage, Tageskurs
Kurssprache: deutsch, Unterrichtsmaterial überwiegend in englischer Sprache


This course covers using the Java Persistence API within a stand-alone Java Standard Edition application, as well as within the context of a web-based Java Enterprise Edition application. This includes using Java Persistence API with the Enterprise JavaBeans technology.

Learn To:
  • Update multiple database tables based on relationships.
  • Perform CRUD operations with JPA in Java SE and EE environments.
  • Perform data validation using Bean Validation.
  • Optimize JPA for performance.
  • Apply transactions and locking.
  • Map relational database tables to Java using ORM techniques and JPA.
  • Understand key concepts found in the Java Persistence API.
  • Create robust entity models.
  • Create static and dynamic queries using Java Persistence API Query Language.
  • Create type-safe queries with the Java Persistence API Criteria API.
JPA Enhancements

JPA has been enhanced and simplified in Java EE 6. The Java Persistence API (JPA) version 2.0 specification facilitates more effective and reliable (that is, more strongly typed) methodology for building object-centric criteria-based dynamic database queries. JPA was introduced in Java EE 5, and provides a POJO-based persistence model for Java EE and Java SE applications.

Relational Data Mapping Persistence is the technique through which object models broker the access and manipulation of information from a relational database. JPA handles the details of how relational data is mapped to Java objects, and it standardizes Object/Relational mapping.

  • Java-Entwickler
  • Datenbankdesigner

  • Map relational database tables to Java using ORM techniques and JPA
  • Perform CRUD operations with JPA in Java SE and EE environments
  • Update multiple database tables based on relationships
  • Perform data validation using Bean Validation
  • Apply transactions and locking
  • Optimize JPA for performance

Course Introduction

  • Describing the target audience for this course
  • Explaining the course itinerary
  • Describing the format that the class will use
  • Introducing the course environment
  • Describing the need for Object-Relational Mapping

Introduction to Java Persistence API

  • Describing the Java Persistence API
  • Creating entity classes
  • Using persistent field and properties
  • Using a generated primary key (table, sequence and identity)
  • Obtaining an Entity Manager
  • Creating a Persistence Unit
  • Using an entity manager to create, find, update, and delete entities
  • Creating typed queries in JPA

Working with JPA in a Java Enterprise Environment

  • Evaluating the role of the container with JPA
  • Accessing JPA entities from a servlet
  • Evaluating the application of JSF as a user interface framework
  • Accessing JPA entities from Enterprise JavaBeans
  • Determining the impact of using stateless, stateful, and singleton session beans on entities
  • Configuring a persistence context in an EE context

Introduction to the Auction Application Case Sudy

  • Describing the auction application
  • Defining the domain objects of the auction application
  • Describing the implementation model for the auction system

Modeling Relational Databases with JPA Entities

  • Examining relationships in the data and object models
  • Using relationship properties to define associations
  • Implementing one-to-one unidirectional and bidirectional associations
  • Implementing many-to-one/one-to-many bidirectional associations
  • Implmenting many-to-many unidirectional and bidirectional associations
  • Using OrderBy and OrderColumn annotations to define sort order
  • Applying the OrphanRemoval annotation to prevent orphaned entities

Working with the Entity Manager

  • Describing the relationship between an entity and an entity manager, and between a persistence context and a persistence unit
  • Differentiating between transaction-scoped and extended entity managers
  • Describing the entity life cycle
  • Using entity manager operations to perform CRUD operations: persist, find, merge, remove
  • Examining the role of the entity manager with detached entities
  • Defining and use cascading operations

Persisting Enums and Collections

  • Persisting entities that contain enums
  • Persisting entities that contain collections
  • Persisting entities that contain Maps

Creating Queries with the

  • Describing the Java Persistence Query Language (JPQL)
  • Contrasting JPQL with native queries
  • Using conditionals to filter results
  • Refining queries to return only needed data
  • Performing joins between entities
  • Creating dynamic queries with parameters
  • Using named queries
  • Performing bulk updates and deletes

Using the Critieria API

  • Contrasting the Critiera API with JPQL
  • Using the Critieria API structure and core interfaces
  • Creating SELECT, FROM, and WHERE clauses
  • Creating paths and expressions
  • Using ORDER BY, GROUP BY, and HAVING clauses
  • Using the canonical metamodel

Implementing Bean Validation with JPA

  • Describing the JPA lifecycle phases where validation takes place
  • Creating an entity listener class
  • Utilizing validation groups
  • Using built-in validation constraint annotations provided by Bean Validation
  • Creating a custom Bean Validation constraint

Applying Locking and Transactions

  • Describing transaction semantics
  • Comparing programmatic and declarative transaction scoping
  • Using JTA to scope transactions programmatically
  • Implementing a container-managed transaction policy
  • Supporting optimistic locking with the versioning of entity components
  • Supporting pessimistic locking by using EntityManager APIs
  • Describing the effect of exceptions on transaction state

Advanced Modeling:

  • Evaluating object-relational mapping strategies for entity inheritance
  • Applying single-table-per-class, joined-subclass, and table-per-class inheritance mapping strategies
  • Using embeddable classes
  • Overriding mappings with the @AttributeOverride and @AssociationOverride annotations
  • Specifying composite primary keys

Optimizing JPA Performance

  • Using lazy fetching to prevent the loading of entities that are not being used
  • Using pagination to control the amount data that is needed at any one time
  • Modifying queries to prevent the N + 1 problem
  • Creating read-only queries
  • Describing performance issues associated with IDENTITY ID generation
  • Creating and using stored procedures with JPA and EclipseLink
  • Using cache optimizations with JPA and EclipseLink
erforderlich: empfohlen:
 
  • Oracle WebLogic Server 12c Basic Administration Tasks OBEs
  • Experience with NetBeans recommended
  • Experience building and deploying EE application