On 1/11/2012 9:12 AM, Dan Creswell wrote:
On 11 January 2012 15:11, Gregg Wonderly<gr...@wonderly.org> wrote:
On 1/11/2012 8:30 AM, Dennis Reedy wrote:
On Jan 11, 2012, at 920AM, Dan Creswell wrote:
Alright, so what am I talking about? Convention over configuration -
and there isn't enough of that in the starter kit.
Excellent point.
Once the common
cases are taken care of, configuration becomes more of an exception
than the rule and then there is motivation to dig deeper and do
something more serious like use Groovy or whatever on the behalf of
the individual that will help them get over the hill to something
working.
Simple cases? Maybe two boxes on the same LAN (thus one can use the
subnet as a group name and make some reasonable assumptions about
multicast) and maybe a single box with a correctly configured local
loopback.
Maybe:
groups - default to user.name
multicast - assume available (warn if not)
To whit, the simple webserver tries to connect to itself at startup and
announces if it can't. It might be interesting if Reggie issued a unicast
to itself on local host, as well as expecting itself to appear on multicast
discovery (maybe it does and I've forgotten about this), and announcing if
it can't, at least, see itself via unicast and multicast discovery.
I would imagine it's possible to put all these checks in a little tool
that runs ahead of everything else at install time (and maybe when
starting things in general or similar). After all, the reason for
these checks is to assist in diagnosing a problem that has occurred.
Better to do all these tests and checks from one place before a
problem occurs and confuses people.
Yes, that could work well for diagnosis too. What ever happened the "console"
tool that existed in Jini 1.x days, which did discovery and show what was
"visible"? We need something, that can separate "was discovered" from "can't
download and instantiate. My changes to reggie, to return unmarshalled objects,
conveniently gave me that new opportunity, and I really appreciated that my
"serviceUI client" app, can show me all the services that were discovered, and
then if I invoke one that has a non-resolvable codebase, it can tell me that too.
Gregg Wonderly
