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ejb
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Posted By:   achi_narasimha
Posted On:   Wednesday, August 13, 2003 07:24 AM


what is the difference between EJB and normal java beans?
what is passivation and activation in EJB?

Re: ejb

Posted By:   Kasinath_Rout  
Posted On:   Monday, August 18, 2003 06:09 AM

1. EJB live in multiple address space being distributed business object and Java beans live in single address space.




2. EJB can avail the declarative services like transactions,security,persistence etc where as in simple java beans, you need to write custom code for these kind of services.




3. EJB is a deployable component where as java beans can not be deployed independently.




4. EJB is used to solve business problem but java beans used to develop GUI .




For activation and passivation refer
http://www.jguru.com/faq/view.jsp?EID=1195 thread.

Re: ejb

Posted By:   supraja_madhavi  
Posted On:   Monday, August 18, 2003 01:28 AM

EJB's provide the following built-in services

1. RMI/RMI-IIOP ( Distributed computing)
2. Transactions
3. Security
4. Resource pooling
5. Thread safe
6. Client state
7. Persistence
8. Messaging
9. Life cycle etc.
which are not provided by normal java beans

Re: ejb

Posted By:   Indrasish_Ghosh  
Posted On:   Monday, August 18, 2003 12:45 AM

I beleive this is very basic of EJB. Basically there is no similarities. It is a coincidence that both the name sound similar to some extend. The word bean sometimes really confusing to the beginners but as a whole do not have any similarities.

Re: ejb

Posted By:   Anonymous  
Posted On:   Wednesday, August 13, 2003 08:07 PM

refer to the following thread. The question may be different but you will find your answer...

http://www.jguru.com/forums/view.jsp?EID=1103002

Re: ejb

Posted By:   Christopher_Koenigsberg  
Posted On:   Wednesday, August 13, 2003 09:13 AM

Who's your professor, that gave you the assignment?

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