Batch writing

Question

My application currently has batch writing turned off. I'm implementing a new feature that requires creating and updating a large number of objects, so batch writing would be very beneficial. I'm using the latest Oracle JDBC driver, which supports batch writing.
Unfortunately, TopLink doesn't allow turning batch writing on/off on a per-UnitOfWork basis, so my only option is to turn it only globally by setting batch-writing and jdbc-batch-writing to true in sessions.xml. I'm wondering if doing that is going to have any negative effects on pre-existing code that does not need batch writing. Are there any scenarios where using batch writing is not a good idea? Or should I just turn it on and not worry about it?

Answer 1

I've come up with this code. How does it look?
uow.getEventManager().addListener(new SessionEventAdapter() {
private DatabaseAccessor writeConnection;
private DatabasePlatform bkupPlatform;
public void preCommitUnitOfWork(SessionEvent event) {
UnitOfWork uow = (UnitOfWork)event.getSession();
ClientSession clientSession = (ClientSession)uow.getParent();
clientSession.getParent().acquireClientConnection(clientSession);
writeConnection = (DatabaseAccessor)clientSession.getWriteConnection();
bkupPlatform = (DatabasePlatform)writeConnection.getPlatform();
DatabasePlatform modifiedPlatform = (DatabasePlatform)bkupPlatform.clone();
modifiedPlatform.setUsesBatchWriting(true);
modifiedPlatform.setUsesJDBCBatchWriting(true);
writeConnection.setDatasourcePlatform(modifiedPlatform);
public void postReleaseUnitOfWork(SessionEvent event) {
if (writeConnection != null) {
writeConnection.setDatasourcePlatform(bkupPlatform);
});