Excplicitly Including JDBC Operations in Tx

Question

I have a situation where I have to create a new database connection each
time (the authentication/authorization happens at the database level). Is
there a way to include the database operations in an EJB's container-managed
transaction?
Thanks,
Bob

Answer 1

Bob Lee wrote:
In my situation, I have to create the connection each time. Do I have to
dynamically create a pool with a single connection? Or, can I just call
Driver.connect() and somehow explicitly add this connection to the current
Tx?I see, you don't know the user ID ahead of time... Yes, you could use the dynamic
pool API to make a one-connection pool. I suggest configuring the server to
have a one-connection pool and a TxDataSource for it at startup. Then when
you want to do a TX in an external client, you would destroy the initial pool and
recreate it with the DBMS user you want. This will allow you to use the TxDataSource
to get a connection, which if obtained in the context of a running UserTransaction,
will get automatically included in the tx.
Joe
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>
Thanks,
Bob
"Joseph Weinstein" <[email protected]> wrote in message
news:[email protected]..
Bob Lee wrote:
I have a situation where I have to create a new database connection each
time (the authentication/authorization happens at the database level).
Is
there a way to include the database operations in an EJB'scontainer-managed
transaction?Sure. The EJB should be tx-requires, which means it will start one whencalled
if one is not underway already, or will join the transaction in progressif there
is one. Your code will use the standard JTS/JTA API to obtain and start aUserTransaction.
Then you should obtain your JDBC connection fro a TxDataSource, and itwill be included
in the transaction. If your EJB(s) do any JDBC, it must be to the samepool.
Joe
Thanks,
Bob