Table Of Contents
Latest update [menu]
Version 1.0 updated.
Description [menu]
EJB (Enterprise Java Bean) is used to develop scalable, robust and secured enterprise applications in java.
Unlike RMI, middleware services such as security, transaction management etc. are provided by EJB Container to all EJB applications.
The current version of EJB is EJB 3.2. The development of EJB 3 is faster than EJB 2 because of simplicity and annotations such as @EJB, @Stateless, @Stateful, @ModelDriven, @PreDestroy, @PostConstruct etc
Topics of EJB Specification
The topics of EJB specifications covered by javatpoint is given below.
What is EJB
What is enterprise java beans(EJB) and what are the advantages of EJB?
Session Bean
The session bean represents the business logic. It may be stateless, stateful or singleton.
Stateless Session Bean
What is stateless session bean, its lifecycle and example.
Stateful Session Bean
What is stateful session bean, its lifecycle and example
JMS Tutorial
How to create robust and asynchronous message for distributed applications. What are messaging domains?
What is Java Messsage Service and what are the advantages of JMS.
What is JMS Queue? It is used for peer to peer messaging where a single message is delivered to only one receiver.
What is JMS Topic? It is also known as Publisher and Subscriber model where a single message is delivered to all the subscribers.
Message Driven Bean
A MDB is a JMS client that is invoked by passing message. It is deployed on the application server.
Entity Bean
In EJB 3.2, it is deprecated. Now it is replaced with JPA.
How to install Learn EJB APK for Android [menu]
Download Learn EJB APK file from SameAPK.com, then follow these steps:
Update Phone Settings
- Go to your phone Settings page
- Tap Security or Applications (varies with device)
- Check the Unknown Sources box
- Confirm with OK
Go to Downloads
- Open Downloads on your device by going to My Files or Files
- Tap Install when prompted, the APK file you downloaded will be installed on your device.
How to install Learn EJB APK on Windows 7/8/10 or MAC PC? [menu]
Download Learn EJB APK file from SameAPK.com to your PC (ex: /Users/xxx/Downloads/), then follow these steps:
Using Emulator:
- Download And Install one Emulator Softwares (Ex: Bluestacks, GenyMotion, NoxPlayer)
