EJB Tutorials

Types of EJB

  • 2007-02-20
  • Comments
  • aathishankaran
  • 153342

There are three types of Enterprise Java Beans namely session beans, entity beans and message driven beans. This tutorial briefly explains these types of EJB.
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Difference Between Session and Entity Beans

  • 2008-08-25
  • Comments
  • Paul Allen and Joseph Bambara
  • 153319

A session bean is an EJB that is created by a client and usually exists only for the duration of a single client-server session. A session bean usually performs operations such as calculations or database access on behalf of the client. While a session bean may be transactional, it is not recoverable if a system crash occurs. Session bean objects can be stateless or they can maintain a conversational state across methods and transactions. If a session bean maintains a state, the EJB container manages this state if the object must be removed from memory. However, persistent data must be managed by the session bean object itself.
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Difference Between Stateful and Stateless Session Beans

  • 2008-08-25
  • Comments
  • Paul Allen and Joseph Bambara
  • 154369

Session beans can either be stateful or stateless. With stateful beans, the EJB container saves internal bean data during and in between method calls on the client’s behalf. With stateless beans, the clients may call any available instance of an instantiated bean for as long as the EJB container has the ability to pool stateless beans. This enables the number of instantiations of a bean to be reduced, thereby reducing required resources.
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Required Classes/Interfaces That Must Be Provided for an Enterprise JavaBeans Component

  • 2008-08-25
  • Comments
  • Paul Allen and Joseph Bambara
  • 153210

Here we review the component architecture of EJBs. We also cover the required classes and interfaces for EJB, which include the home and remote interfaces, the XML deployment descriptor, the business logic (bean) class, and the context objects. While these names may or may not be meaningful to you at this point, you will soon understand how each of these pieces fits into the EJB component model.
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Managing Security in EJB

  • 2008-08-25
  • Comments
  • Paul Allen and Joseph Bambara
  • 153253

To simplify the development process for the enterprise bean provider, the implementation of the security infrastructure is left to the EJB container provider and the task of defining security policies is left to the bean deployer. By avoiding putting hard-coded security policies inside bean code, EJB applications gain flexibility when configuring and reconfiguring security policies for complex enterprise applications. Applications also gain portability across different EJB servers that may use different security mechanisms.
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EJB 3 Entities

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Required Classes/Interfaces That Must Be Provided for an Enterprise JavaBeans Component

Difference Between Session and Entity Beans

Difference Between Stateful and Stateless Session Beans

Managing Security in EJB

EJB Entity Beans

Types of EJB

Archived Comments

1. very good cod
View Tutorial          By: moly at 2007-03-13 08:17:40

2. If one can't use English grammar correctly and wit
View Tutorial          By: Java Man at 2011-12-09 06:04:14

3. Detect OS of iphone using Java Code
View Tutorial          By: Naina at 2012-07-31 11:07:09

4. This Example program is very useful.
good w

View Tutorial          By: sathya at 2008-03-28 02:21:41

5. Hi! Ramlak It Working But Sms didnot send why? and
View Tutorial          By: balaji at 2008-01-28 02:41:47

6. can i use PrintWriter to save to a word document o
View Tutorial          By: philip at 2013-03-20 10:21:01

7. sir very well subject is to continuted the java s
View Tutorial          By: G.venkata siva naga kumar at 2009-11-06 01:13:02

8. Thanx!!!!....
It helped me to startup with

View Tutorial          By: RAJITHA REDDY at 2011-03-01 02:47:03

9. package practice_bo;

import practic

View Tutorial          By: nishi at 2011-12-09 02:00:20

10. thank's
View Tutorial          By: gerald at 2010-08-06 01:21:39