How to set default isolation level

[Damian Hofmann]

Hi,

I have a question about isolation levels. In the chapter "Configuring 
isolation levels" the Derby Developer's Guide mentions, that the default 
isolation level for new connections is CS (TRANSACTION_READ_COMMITTED). 
It also states, that if the isolation level is set to RR the connection 
inherits the isolation level TRANSACTION_SERIALIZABLE, which is the 
right one for me. But I can't figure out how I change the default 
isolation level.

Is there a way to change the  default isolation level so every new 
connection will inherit TRANSACTION_SERIALIZABLE? Or do I have to set 
this isolation level for every transaction manually?

Thanks
Damian