lookup time slow at first time

[chinafax]

public TestHotelOrderService() throws NamingException{
InitialContext ic = new InitialContext();
long start=System.currentTimeMillis();
session = (HotelOrderService.Remote) ic.lookup("btoss/HotelOrderServiceBean/remote");
long end=System.currentTimeMillis();
System.out.println("lookup time1 "+(end-start)/1000.00);

start=System.currentTimeMillis();
dao=(DaoService.Remote) ic.lookup("btoss/DaoServiceBean/remote");
end=System.currentTimeMillis();
System.out.println("lookup time2 "+(end-start)/1000.00);

}

version:JBoss_4_0_4_CR2
Result:
lookup time1=15.25 second
lookup time2= 0.016 second

Question:
why the lookup time at first time so long inside a construct method? The time for lookuping local reference is as long as remote at first time when I new an new InitialContext();
If I do not cache remote reference, any other way to reduce lookup time?

Stephen

[neotyk]

Is http://java.sun.com/blueprints/patterns/ServiceLocator.html what you are looking for?
HTH.

[chinafax]

Thank for your reply. I know that servicelocator pattern can solve the problem.

But I just curious that daoservice also is the first time look up, why it could be so quickly? Why it didn't take 15 second?

Best regards,
Stephen

[neotyk]

Hi,
If you are curious, run JBoss in TRACE or DEBUG, there is info on wiki/forums how to turn TRACE on.
If you'll get answer, post it.
Good luck.