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EJB Stands For

EJB stands for Enterprise Java Beans and provides an architecture for developing and deploying component-based enterprise applications. There are three main types of EJB: session beans which store data for a single user session, entity beans which represent persistent data storage, and message driven beans which consume JMS messages from external entities. EJB provides benefits like simplified development of large enterprise applications and handles services like transactions and persistence so developers can focus on business logic.

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32 views2 pages

EJB Stands For

EJB stands for Enterprise Java Beans and provides an architecture for developing and deploying component-based enterprise applications. There are three main types of EJB: session beans which store data for a single user session, entity beans which represent persistent data storage, and message driven beans which consume JMS messages from external entities. EJB provides benefits like simplified development of large enterprise applications and handles services like transactions and persistence so developers can focus on business logic.

Uploaded by

Tripti Vijay
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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EJB stands for Enterprise Java Beans. EJB is an essential part of a J2EE platform.

J2EE platform has component based architecture to provide multi-tiered, distributed


and highly transactional features to enterprise level applications.

EJB provides an architecture to develop and deploy component based enterprise


applications considering robustness, high scalability, and high performance. An EJB
application can be deployed on any of the application server compliant with the J2EE
1.3 standard specification.

We'll be discussing EJB 3.0 in detail in this tutorial.

Types
EJB is primarily divided into three categories; following table lists their names with
brief descriptions −

S.No Type & Description

Session Bean
1 Session bean stores data of a particular user for a single session. It can
be stateful or stateless. It is less resource intensive as compared to entity bean.
Session bean gets destroyed as soon as user session terminates.

2 Entity Bean

Entity beans represent persistent data storage. User data can be saved to
database via entity beans and later on can be retrieved from the database in the
entity bean.

3 Message Driven Bean

Message driven beans are used in context of


JMS JavaMessagingServiceJavaMessagingService.
Message Driven Beans can consumes JMS messages from external entities and
act accordingly.
Benefits
Following are the important benefits of EJB −

 Simplified development of large-scale enterprise level application.


 Application Server/EJB container provides most of the system level services
like transaction handling, logging, load balancing, persistence mechanism,
exception handling, and so on. Developer has to focus only on business logic of
the application.
 EJB container manages life cycle of EJB instances, thus developer needs not to
worry about when to create/delete EJB objects

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