question: public static final void saveInstanceIdentifier ( String confPath , String instanceIdentifier ) throws Exception { Path file = Paths . get ( confPath , INSTANCE_IDENTIFIER_FILE ) ; log . trace ( "Saving instance identifier to {}" , file ) ; AtomicSave . execute ( file . toString ( ) , "inst" , instanceIdentifier . getBytes ( StandardCharsets . UTF_8 ) ) ; }
target:  Saves the instance identifier of this security server to file.