[jboss-dev] Host and Node name feature

[David M. Lloyd]

In case you haven't followed the discussion [1], I've recently added a 
concept of a "node name" to JBossAS trunk [2].  This name will initially be 
used to identify the Remoting 3 Endpoint which is created for the JBossAS 
instance, and could also be reused by other things for similar purposes. 
The node name can be found in the "jboss.node.name" system property, and 
can be set on the command line with the "-N" or "--nodename" switch.

Because we want to have sensible default for this name, I've also 
introduced a pair of properties which may be used to retrieve the system 
host name (not to be confused with DNS name; this is the answer you get 
back when you run the "hostname" command).  The algorithm I use is 
purported to work on all major OSes, but feel free to test that if you 
like.  The properties are "jboss.host.name" and 
"jboss.qualified.host.name"; you may manually set the host name at boot via 
the command line "-H" or "--hostname" switch.

It should be pretty easy to verify the host name detection by checking out 
the newly sorted [3] system properties.

One last thing.  A server's host name, while not exactly the Colonel's 
secret recipe, still technically represents inside information about the 
system, and thus the node name (which may be derived from it) should not be 
used directly in anything that might make it out to untrusted systems by 
default (read: HTTP cookie values for example) (though there's no reason 
why our users/administrators couldn't opt into it).

Have fun.

[1] http://community.jboss.org/message/529257#529257
[2] https://jira.jboss.org/jira/browse/JBAS-7779
[3] https://jira.jboss.org/jira/browse/JBAS-7776
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- DML ☍