Java Fast Track to EJB 3.0 and JPA – JAV855
The Enterprise JavaBeans 3.0 specification is a deep overhaul of the EJB specification that is intended to improve the EJB architecture by reducing its complexity from the developer’s point of view. It leverages annotations (introduced in Java 5) and Object-Relational Mapping (ORM) technologies to eliminate the dependence on complex EJB APIs, allow POJO (Plain Old Java Object) based development, and provide an effective technology for creating distributed, transactional components, and for mapping relational data to an object schema. This Java training course provides thorough coverage of the EJB3 technology including new concepts such as the use of annotations and the use of Dependency Injection to initialize references.
This course also includes in-depth coverage of managing persistence using the Java Persistence API (JPA). It uses hands-on labs and a well-paced approach to make this complex technology understandable in an accelerated fashion. You will come away with a comprehensive understanding of EJB and the important issues that need to be considered to use it in real world applications.
Fast Track to EJB 3.0 and JPA Programming Training Course
Fast Track to EJB 3.0 and JPA – 3-Day – JAV855 Request a Class Date
The Enterprise JavaBeans 3.0 specification is a deep overhaul of the EJB specification that is intended to improve the EJB architecture by reducing its complexity from the developer’s point of view.
Course ID: JAV855
Duration: 4 days
Audience: Java developers who want to use EJB3.
Java Training Course for EJB 3.0 and JPA Topics Overview:
- What is EJB?
- EJB Goals
- Types of Enterprise JavaBeans
- Java Persistence API
- EJB and Java EE (Enterprise Editions)
- EJB in Java EE Architecture
- SOA and EJB
- SOA with Web Services and EJB
EJB 3.0
- EJB 3.0 Overview
- EJB 2.X Problems
- EJB 3.0 Goals
- Session Bean Usage
- Persistent Entity Usage
- MDB Usage
Session Bean Overview
- What are Session Beans?
- Stateless Session Beans (SLSB)
- Stateful Session Beans (SFSB)
- Session Bean can be Distributed
- Defining a Session Bean
- Stateless Session Bean Definition
- Calculator Remote Business Interface
- Remote and Local Business Interfaces
- Calculator Bean Local Business Interface
- A Brief Note on Annotations
- How Annotations Work
- Annotation Definition
- Using Annotations
- What Else is Needed?
Packaging and Deployment
- J2EE Packaging
- EJB-JAR File
- Deployment Descriptor (DD)
- Deployment Descriptors in EJB 3
- EJB-JAR File Structure
- Enterprise Archive (EAR File)
- application.xml File
- Server Deployment
- EJB Container
- The EJB Container
- Server Deployment
JNDI Overview
- How do Remote Clients get EJB Access?
- JNDI – Java Naming and Directory Interface
- EJB Container Binds a Reference into JNDI
- Client Looks up Reference in JNDI
- JNDI Tree Structure
- JNDI API Overview
- JNDI API
- The Context Interface
- The InitialContext Class
- Specifying the InitialContext Properties
- Using JNDI
EJB Client
- Client View of a Session Bean
- Client Invocation of a Session EJB
- PortableRemoteObject and Casting
- Running a Client
Dependency Injection
- Dependency Injection
- The JavaTunes Online Music Store
- An EJB Referencing Another EJB
- CatalogMaintenance
- Injection of CatalogMaintenance
- What is Happening
Deployment Descriptors
- More About Deployment Descriptors
- The XML Deployment Descriptor
The EJB Environment
- Issues with Obtaining Resources
- Referencing Resources External to EAR
- Reference and Deployment Descriptor Usage
- Resolving a JNDI Name
- Simple Environment Entries
- Declaring Simple Environment Entries
- Setter Injection
- Resource Manager Connection Factories
- More on the Enterprise Bean Environment
- The Environment is a Level of Indirection
- Looking up Resources in the Environment
- Looking up via EJBContext
- Looking up via JNDI API
- More on the @Stateless Annotation
- More on the @EJB Annotation
- More on the @Resource Annotation
- Deployment Descriptor vs Annotation
Stateless Session Bean Lifecycle and Interceptors
- Stateless Session Bean State Diagram
- Lifecycle of SSB
- Client Call of a Stateless SB Method
- Interceptors
- Business Method Interceptors
- InvocationContext Interface Details
- Interceptor Method Details
- Interceptor Class
- Using Interceptor Classes
- Method Level Interceptors
- Lifecycle Callback Interceptors
- Lifecycle Interceptor in the Bean Class
- Lifecycle Interceptor in a Separate Class
Stateful Session Beans
- Stateful Session Bean (SFSB) Overview
- Coding a Stateful Session Bean
- Stateful Session Bean Clients
- Stateful Session Bean Removal
- Stateful Session
- Passivation/Activation
- When to Use Stateful Session Beans
- @PrePassivate and @PostActivate
- Callbacks
- Stateful Session Bean State Diagram
The Timer Service
- Bean Requirements
- The javax.ejb.Timer Interface
- The javax.ejb.TimerService Interface
- How the Timer Works
- Issues with Using the Timer Service
Overview of Messaging Systems
- What is Messaging?
- Loose Coupling
- When is Messaging Used?
- Two Messaging Models
- Publish/Subscribe – Illustrated
- More on Publish/Subscribe
- Point-to-Point – Illustrated
- More on Point-to-Point (P2P)
- Message Delivery – Push versus Pull
Overview of JMS API
- What is Java Message Service?
- API Structure
- JMS Interfaces
- Administered Objects
- Administered Objects and JNDI
- Illustrated
- Client Workflow
- Synchronous Queue Consumer Client
- Asynchronous Queue Consumer Client
- JMS Message Types
- Message Header Fields
Message-Driven Beans
- J2EE Message Producers and Consumers
- Message-Driven Bean (MDB) Overview
- Goals of Message-Driven Beans
- MDB Consumption of a Message
- @MessageDriven Details
- Activation Configuration Properties
- Specifying a Destination for an MDB
- Specifying a Destination Using a DD
Message-Driven Bean Lifecycle
- Lifecycle Overview
- MDB State Diagram
- Interceptor Methods
Transaction Definition
- Transaction Overview
- Transaction Lifecycle
- Transactions Clarify Systems
Transactional System Overview
- Overview of a Transactional System
- Transactional System Components
- Transactional Object
- EJB Transaction Support
Transactions in EJB
- EJB Declarative Transaction
- Management
- Transactional Scope
- EJB Transaction Attributes
- Specifying Transaction Attributes-NOTSUPPORTED,SUPPORTS,REQUIRED,REQUIRESNEW,MANDATORY,NEVER
- Beans Have a Say in Transactions
- Beans can be Notified of Transaction Status
- Transaction Attributes – Some Choices
- Explicit/Bean-Managed Transactions
- Transaction Isolation Levels
- Multi-Process TX and Two Phase Commit
Security in EJB
- Security Requirements
- J2EE Security Roles
- J2EE Security Overview
- EJB Security Overview
- Authentication
- Programmatic Security
- Transport Level Security with SSL
Exception Handling
- Overview of Exceptions
- Exception Hierarchy
- Application Exceptions in EJB
- Defining Application Exceptions
- Container Handling of Application Exception
- Bean Throwing of Application Exception
- Client Handling of Application Exceptions
- System Exceptions Indicate Failure
- Container Handling of System Exception
- Client Handling of System Exceptions
EJB 3 Best Practices
- When to Use EJB
- Keep Business Interfaces Coarse Grained
- Session Façade Structure
- Use Container-Managed Transactions
- Transaction Duration
- Local and Remote Business Interface Tuning
- Session Bean Tuning Clustering
- Clustering Session Beans
JPA Overview
- The Issues with Persistence Layers
- Object-Relational Mapping (ORM) Issues
- Issues with JDBC Alone
- Java Persistence API Overview
- JPA Benefits
- Java Persistence Environments
Mapping a Simple Class
- Entity Classes
- Entity Class Requirements
- The Entity Declaration
- The Event Class
- The Id Property
- Field Access or Property Access
- The EVENTS Table
- Generated Id Property
- Mapping Properties
- Basic Mapping Types
- Persisting to the Database
Entity Manager and Persistence Context
- The Entity Manager & Persistence Context
- The EntityManager
- The EntityManager Interface
- Persistence Unit
- Injecting an EntityManager
- Retrieving Persistent Objects
- Container-Managed Entity Manager
- The Persistence Unit
- persistence.xml
Inserting and Updating
- Transient, Persistent, Detached Instances
- Removed Instances
- Persisting a New Entity
- Synchronization to the Database
- Updating a Persistent Instance
- Detached Entities
Querying and Java Persistence Query Language (JPQL)
- Java Persistence Query Language
- JPQL Basics
- Executing a Query
- Where Clause
- Query Parameters
- Using Query Parameters
- Named Queries
Versioning/Optimistic Locking
- Optimistic Locking
- Using a Detached Instance
- Versioning
- Version Property in Java Class
- Locking Objects
- Lock Modes
Entity Relationships
- Relationships Overview
- Object Relationships
- Characteristics of Relationships
- Directionality
- Characteristics of Relationships
Mapping Relationships
- Mappings Overview
- Unidirectional Many-To-One Relationship
- The Table Structure – Many-To-One
- The Owning Side
- @JoinColumn
- Bidirectional One-To-One Relationship
- Using the Relationship
- More on the Inverse Side
- Bidirectional One-To-Many Relationship
- Mapping the One-To-Many Relationship
- Other Collection Types
- Many-To-Many Relationship
- Defining Many-To-Many Relationship
- Mapping Many-To-Many Relationships
- Specifying the Join Table
- Lazy and Eager Loading
- Cascading Operations
- The Cascade Element
- Queries Across Relationships
- OUTER and FETCH JOIN
Mapping Inheritance
- Entity Inheritance
- Details of Entity Inheritance
- Single-Table Strategy
- Entity Definitions for Single-Table
- Single Table: Pros and Cons
- Joined (Table per Subclass)
- Entity Definitions for Joined
- Joined: Pros and Cons
- Table per Concrete Class
Embedded Objects
- Using Embedded Objects
- Embeddable Class
- Reusing Embeddable Classes
- Overriding Embedded Class Attributes
Compound Primary Keys
- Compound Key with Embedded Id Class
- Using an Embedded Id Class
- Compound Key with ID Class
Additional Java Persistence
- Capabilities
- More on Querying
- Projection Queries
- Aggregate Queries
- Bulk Update and Delete
- Native SQL Queries
Extended Persistence Contexts
- Stateful Session Beans with Entity State
- Extended Persistence context
- Issues with Extended Persistence Context
XML Mapping Files
- XML Mapping Files
- A Simple Entity Class
- JPA XML Mapping File
- JPA XML Mapping File – Mapping Entities
- JPA XML Mapping File – Named Queries
Java Persistence with Java SE
- Using JPA with Java SE
- Java SE APIs
Java Persistance Best Practices
- Primary Key Considerations
- Use Named Queries
- Use Lazy/Eager Loading Appropriately
- Be Aware of Transaction Semantics
- Encapsulate JPA Code
- Use Report Queries Where Applicable
- Optimize Read-Only/Mostly Data Access
- Paging Data
- Consider Going Outside of Java Persistence