Dear All!
Please forgive me if these questions has already been asked, actually our
internet is too slow to access the whole EJB subscription over the net.
I have following questions
For example, I have a BMP entity EJB and it also has a primary key. How does
container handles the concurrency requirements. Like If one client calls
findbyPrimaryKey("12") and it is given the Remote interface. Now an another
calls findByPrimaryKey("12")? what the container will do ? It will block the
second client or every client will be thier own copy? Do i need to do any
dirty reading checking like (balance was 24 when EJB read the row or row is
present in the database)? It will require extra programming ? should we do
it?
We have used Connection (java.sql) objects in our ejbLoad and ejbStore code?
But by default connection object is *autocommit* and every EJB example uses
it in default mode? What internally happens? How container inetercept the
connection object calls (if it was not obtained from the DataSource)? Should
we do any commit stuff ourself or not?
Whenever any of our BMP EJBs method is called? The ejbLoad and ejbStore is
also called? How can I stop doing it? As I want Object scope Transactions
management ?
Should we have the Primary Key one to one corresponding to the Database table
PK or it can be customized to do some optimizations? If we can do that then
how container will be able to do locking on the rows?
Fareed Ahmad
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