session.clear() or evict() for all InstancesOf

prot · **Joined:** Wed Nov 09, 2005 5:28 am **Posts:** 3

hibernate reference doc recommends the following code for batch inserts:

Code:

for ( int i=0; i<100000; i++ ) {
   Customer customer = new Customer(.....);
   session.save(customer);
   if ( i % 20 == 0 ) { //20, same as the JDBC batch size
      //flush a batch of inserts and release memory:
      session.flush();
     session.clear();
   }
}

the Problem is that i do not want to clear the whole session cache, i only want to eliminate the batch-inserted objects.
Instead of calling session.clear(), i'd like to havel something like

Code:

session.clear(Customer.class) 
or 
session.evict(Customer.class)

i haven't found any of those methods or something equivalent in Hib3rc2 ... any chance for such a method in a future release?
or is there any way to clear all InstancesOf without calling session.evict(Object) for every object?

kgignatyev · **Posted:** Wed Nov 09, 2005 3:39 pm

I think that
s.getStatistics().getEntityKeys() might be used to get list of all objects in the session cache and then it could be filtered of course by entity type, so it looks like it is quite easy to create a function that will evict objects one by one, but on the appearance it will look like evictAll( String entityName, Session session ).

IMO: that should be on the application level, not in the H