RMI Connection questions... (Newbie)

[Agustin Chernitsky]

Hi Guys,

I'm starting with RMI (I actually started programming in Java a month ago)
and I have some questions/doubts:

1.- Why I don't get any persistent connections? All connections initiated
from Clients to Server are in a status of TIME_WAIT as soon as there is no
more interactivity (Remote method invocations) between them. Does this mean
that every time I invoke a remote method, RMI creates a socket connection??
Is there a way to make a permanent connection?

2.- If I register a remote client object reference (a callback) to the
server, and the pass this remote reference to another client (ie Client A
registers to Server, the Server gives Client B the ref of A), what will
happen? A and B will establish a TCP connection directly?

Well, Any ideas are welcome!!

Thanks!

Agustin.

 

[Agustin Chernitsky]

Hi Joe,

Thanks a lot for the quick reply! One more thing: Is it safe to use the
sun.rmi.transport setting? Since I read the Warning sign... about
standards.. bla bla...

Anyway, thanks a lot!

Agustin.

 

[Joseph Dane]

Thanks a lot for the quick reply! One more thing: Is it safe to use the
sun.rmi.transport setting? Since I read the Warning sign... about
standards.. bla bla...

it's safe, but you'll have to be a little careful. Sun chose to
publicly document the settings, which is something they don't
typically do with internal, non-public APIs, because a lot of people
use their RMI implementation and need to tweak these parameters.

that said, they put that disclaimer up for a reason. if Sun decides
to change their implementation, those properties could change, and
they'd be under no obligation to tell you. I'd say that the
likelyhood of this is low, though, and anyhow if you stick with a
single version of Java you'll be safe.