rmi, two binding methods, what differences?

[John_Woo]

Hi,

I'm wondering, which better/differences, in the following two rmi
binding methods:

A.
java.rmi.registry.LocateRegistry.createRegistry(defport);
Services server = new ServicesImpl();
Naming.rebind("rmi://ahost:aport/aService", server);

B.
Registry registry = LocateRegistry.getRegistry();
registry.rebind("aName", astubObject);

It seems A has to use a port, which may need a special setting over
firewall; for B, what's the port number?

 

[staudinger]

B.
Registry registry = LocateRegistry.getRegistry();
registry.rebind("aName", astubObject);

It seems A has to use a port, which may need a special setting over
firewall; for B, what's the port number?

1099 by default.

 

[John_Woo]

1099 by default.

what about if 1099 already in used?

what significant difference between A & B?

 

[EJP]

what about if 1099 already in used?

It shouldn't be because it is reserved by IANA for the RMI Registry. So
if it's in use it *should* mean that the RMI Registry is already running.

what significant difference between A & B?

The significant difference is that A starts the registry on port
'defport' and B assumes it is already running on port 1099.

 

[John_Woo]

It shouldn't be because it is reserved by IANA for the RMI Registry. So
if it's in use it *should* mean that the RMI Registry is already running.


The significant difference is that A starts the registry on port
'defport' and B assumes it is already running on port 1099.

Thanks lots,

the port 1099, in my unix, may already be used by other app (not java).
in this case,
how would you think the default port for rmi?

John

 

[EJP]

the port 1099, in my unix, may already be used by other app (not java).
in this case,
how would you think the default port for rmi?

I don't understand the question but I've already told you that port 1099
is reserved by IANA, which is the Internet Assigned Numbers Authority,
for the RMI Registry. So any other application that is using 1099 is
non-compliant and should be fixed or trashed.

If you can't get the application using 1099 fixed, use another number,
obviously.