Re: Transaction for entity and Session Bean.

[Murthy, A (CAP, GEFA, Contractor)]

Hi,
I am sorry to disturb everyone here, Can any one tell me how to connect or
work with legacy databases like IMS database(Hierarchical database) of IBM
mainframe using EJB and CORBA technology?  where can I find this type of
information ? Has anyone worked on that?
Please give the details how to start working with that? IS there any other
way to connect to mainframe databases using web technology (i.e. with Java)?




Murthy A Suryanarayana
GE Financial Assurance
LTC - OPS2000 Project
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-----Original Message-----
From: Dan Hinojosa [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 16, 2000 10:23 AM
To: [EMAIL PROTECTED]
Subject: Re: Transaction for entity and Session Bean.


I don't think that transaction is the right word to use.  Transactions
make sure that methods of a beans or beans themselves are part of an
"all for one, or none for all" process.  The clich� example is
transferring money from savings to checking.  You need to make sure that
adding checking with a specified amount, and deducting from saving by
the same amount happens in the same transaction. If one method completes
and the other doesn't it, someone's going to lose some money.

When you say container or bean managed "persistence" it refers to who is
doing the SQL and Connection programming to put it simply.  Container
managed persistence allows you to myBean.setName("Bob") and not worry
about the internals.  When you have a legacy DB or something else
strange you might use Bean Manage Persistence.

Session Beans have no persistence although you can use the session bean
to store information into a db. It doesn't remember the information it
has placed in the database.  You would only interact the session bean
with the back end when you want to store something that you don't need
to remember.

Hope that helps.
--

Dan Hinojosa
Java & Lotus Notes Consultant
Java Certified Programmer

P.O. Box 4675
Albuquerque, NM 87196-4675
Telephone: (505) 262-0911
Email: [EMAIL PROTECTED]
WWW: http://www.digitalpriest.com

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