Hi,
I have one simple question:
Assume there are an entity bean A and two users (clients) U1 and U2. U1
finds the bean A with ejbFindByPrimaryKey(PK). He intends to update the
data represanted by bean A.
How can U2 be informed that bean A will currently be updated by another
user if he also wants to update bean A (must U1 do a ORA SELECT FOR UPDATE in
the ejbFind.. method see
above)? U2 should be able to read the data but he has to know that he
cannot change the data (He is reading old data). If I use isolation
level "TRANSACTION SERIALIZABLE" then U1 won't be able to read the data,
will it ?
This scenrio can happen inside a update/maintenance GUI dialog. But customers
want be informed before they open the update dialog with a little message.
The data is only for reading displayed !
Any help will be appreciated
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