The document discusses Enterprise JavaBeans (EJB) and Contexts and Dependency Injection (CDI) in Java EE. EJB is an architecture for transaction-oriented enterprise applications and includes stateless, stateful, and singleton session beans that can be called via no interface, local interface, or remote interface. CDI provides dependency injection, bean management, and lifecycle management. It supports scopes like request, session, application, conversation, and view scopes as well as custom scopes and features like events and design patterns.

1. EJB &
CDI
Jakub Remenec

2. Java Bean
Reusable software component
implementing business logic

3. Bean Types (Java EE)
JSF Managed beans
CDI beans
EJB beans

4. Is an architecture for component-
based transaction-oriented
enterprise applications
Enterprise JavaBeans

5. Stateless
Stateful
Singleton
Session EJB

6. Session EJB method calling
No interface (in the same application)
Local interface (same JVM)
Remote interface (different JVMs)

7. Message driven EJB
Queue
Topic

8. Weld CDI
Reference CDI implementation for
dependency injection, bean
management and lifecycle object
management

9. Request scope
CDI - Scopes
Session scope
Application scope
Conversation scope
View scope
Custom scope

10. Other CDI features
Events
Design patterns (observer, producer - consumer)
Custom qualifiers
and much more …