[jboss-as7-dev] dmr: server instances?

[Brian Stansberry]

On 3/18/11 10:01 AM, Emanuel Muckenhuber wrote:
> On 03/18/2011 03:45 PM, Brian Stansberry wrote:
>> On 3/18/11 7:03 AM, Heiko Braun wrote:
>>>
>>> is the 'server' node the element that contains server instances?
>>
>> Yes; that's where you access the actual running server.
>>
>> The operations to actually start/stop/restart the server and check their
>> status are under "server-config" which I'm not happy about. Not
>> intuitive. It's that way because of a kind of chicken-and-egg problem.
>>
>> Emanuel, WDYT about a more sophisticated ProxyController for the
>> servers? Installed by the ServerAddHandler. It handles the lifecycle and
>> status ops directly; proxies the rest. Where it gets complicated is
>> things like read-resource, read-resource-description, read-attribute,
>> all of which would require custom handling. It also make a server
>> resource an odd duck, since it's resource description varies depending
>> on whether the server is started.
>>
>
> Yes, we could think of doing something like that - maybe we should just
> create a ManagedServer for all configured servers and make it the proxy.
> It should be aware of the lifecyle/state of the server anyway and also
> holds the associated managed connection.
>

Yes, that sounds like the right way to implement it.

Heiko/Ike/Emanuel/anyone -- any concerns about the "resource description 
varies" issue?

What I mean is, for all other resources, read-resource-description will 
return fixed content. For host=x,server=y it will vary depending on 
whether the server is actually started. If not running, it will just 
provide the operation to start the server and a "status" attribute, 
which will tell you it's stopped. Once you start the server, then 
read-resource-description will provide that, plus ops to stop and 
restart the server, plus all the normal attributes and operations 
exposed by the root resource of a server.


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-- 
Brian Stansberry
Principal Software Engineer
JBoss by Red Hat