Java.sql.connection problems

Hi, I hav got this problem:
PRB 1
I have got the JDBC connection established with the
OracleDataSource instance on my java application
I wonder if there is a way to check the connection if
it is still alive. any hint? i tried
connection.isClosed() but that doesn't help.From Java APIs reg. isClosed():This method is guaranteed to return true only when it is called after the method Connection.close has been called.
This method generally cannot be called to determine whether a connection to a database is valid or invalid. A typical client can determine that a connection is invalid by catching any exceptions that might be thrown when an operation is attempted.
PRB 2
I am in this scenario:
The connection is established during application start
and something goes wrong say like the DB server goes
offline in the middle of no where and I do a commit /
rollback. I will get a SQLExeption called. But right
after the db comes back online.. i tried to do a
commit / rollback, the SQLExeption is still persist.
Q1. Does this mean that when the exception is caught,
my connection would no longer be valid and I need to
restart the application?
Q2. could i reinitialize the connection after the
exception to avoid the restart?Once your DB goes down, your connection is broken. You cannot do anything with that connection...like Rollback, commit etc. You need to re-establish the connection. You don't need to restart the application, but you might want to check if the connection is null. If it is, you might have to try a new connection. Probably, your application can quit trying for a connection after 'x' number of attempts.
Kumar

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