EJB 3.0 Tutorials

                         

This tutorial gradually takes a new comer to master EJB along with learning the updated JEE specifications using glass-fish server. Tutorials provided are easy to grasp and subsequently shift onto the practical implementations. 

1. Introduction to Application Server
   Application server was developed to support for developing the enterprise applications for security and state maintenance with the data base and persistence.
                                  
2. What is EJB-Container?
   Transaction Management
   Security
   Resource and life cycle management
   Remote Accessibility 
   Concurrency control
   Clustering and load-balancing 
                                     
3. Enterprise Beans
   What is an enterprise bean
   Benefits of enterprise beans
   When to use enterprise beans
   Types of enterprise beans
                            
4. Features of EJB 3.0
   Elimination of Home and Remote Interfaces
   Elimination of Component Interface
   Simplified Access to Environment
   Dependency Injection
   EJB Context
   Enhanced Lifecycle Methods and Callback Listener Classes
   Interceptors
   Simple JNDI lookup of EJB
                                       
5. Annotations
   To make the development easier and execution of the programs fast and efficient sun micro system added the features like annotation in jdk 5. The main objectives behind the development of annotations is to make the development easier. Annotations behaves like the meta
                             
6. Session Beans
   What is a session bean
   Types of session beans
   Stateless Session Bean
   Stateful session bean
   When to use session bean
   Life Cycle of Stateless session
   Life Cycle of Stateful session bean
                        
7. Getting Started Examples with Enterprise Session Beans
   
   • Stateless Session Bean Example
   • Statelful Session Bean Example
                   
8. Message Driven Beans
   Motivations for messaging
   Non blocking request processing
   Decoupling
   Reliability
   Support for multiple senders and receivers
   Java Message Services (JMS)
   JMS API
   JMS Architecture
   Integrating JMS with EJB
   Using a Java Object that receives the JMS messages to call EJB client
   Reuse an existing type of EJB component somehow to receive JMS messages
   Message driven bean
                                        
9. A Message-Driven Bean Example
   To receive messages asynchronously,  a Message-driven bean is used. Message driven beans are the light weight components used for communication via messages (e.g., email or IM messages).
                                             
10. Introduction to POJO (Plain Old Java Object) 
    One of the new features of added by Sun Microsystems in EJB 3.0 is POJO (Plain Old Java Object). It is a Java object that doesn't implement any special interfaces require by the EJB framework.  
                                              
11. Java Persistence API
    Java Persistence API is the standard API used for the management of the persistent data and object/relational mapping. Java Persistence API is added in Java EE 5 platform. Every application server compatible with Java EE 5 supports the Java Persistent APIs.
                   
    Features of JPA
    Advantages of JPA
    Domain Model:
    The Basics of EJB3 JPA and O-R Framework:
    Metedata Annotation in Action
    Entities
    Requirements of Entity Classes
    Persistence Fields and Properties in Entity Classes
    Persistence Fields
    Persistent Properties
    Primary Keys in Entities
    Primary Key Classes
    Multiplicity in Entity Relationships
    Direction in Entity Relationships
    Queries and Relationship Direction
    Cascade Deletes and Relationships
    Entity Inheritance
    Abstract Entities
    Mapped Superclasses
    Non-Entity Superclasses
    Entity Inheritance Mapping Strategies
    Single Table per Class Hierarchy Strategy
                                
12. A Java Persistence Example
    In the Book catalog example, we define a Book entity bean class. The bean has three properties (title, author and price) to model a Book product. The id property is used to uniquely identify the Book bean instance by the EJB3 container. The id value is automatically generated when the bean is saved to the database.  
                                    
13. Web Services
    Web services are the mechanism to develop a Service-Oriented-Architecture (SOA). SOA is an architectural approach for designing large scale distributed systems to integrate heterogeneous application on the service interfaces. 
                 
    WSDL
    SOAP
    Implementing Web Services
    Packaging and Deploying a Web Service Session Bean
    Implementing a Web Service Client
                                        

EJB 2.0 Tutorials