[jboss-dev] Re: Sep/14th cutoff date for component updates in AS5 Beta3

[Brian Stansberry]

I'll respond to your last point first, as it's the "bottom line." Other 
responses in-line.

My impression when you first asked on this thread yesterday is you'd 
decided you really did not want to disrupt your 2.6 roadmap in order to 
get it in AS 5, and were seeking buy-in from Dimitris and myself.  Seems 
I was mistaken.

If 2.6 can't interoperate with 2.5, we should get 2.6 in AS 5. I'd 
thought the change was a difference in an API we weren't using, or that 
we could code around if we wanted to upgrade.

Bela Ban wrote:
> 
> 
> Brian Stansberry wrote:
>> Can you clarify a bit why moving to 2.6 will never be possible?
> 
> Because of the policy of only including dot release upgrade of component 
> libraries in AS, or has this changed ? So 2.5.1, 2.5.2 and so on 
> wouldn't be an issue, but 2.6 would. Correct ?
> 

Dimitris, please comment with the official answer. :)

I'd think there'd be no problem upgrading across minor releases if we 
went from 5.0.x to 5.1.0, but there would likely be a problem if we went 
from 5.0.0 to 5.0.1.

Either way, this points to a larger issue where it's unclear what the 
big picture AS roadmap is. Do we want to do a bunch of 5.0.x releases, 
or fairly shortly after 5.0.0 go to a 5.1.0?

>> JBC and ClusterPartition currently call:
>>
>> Channel.connect(String)
>> Channel.getState(Address, long)
>> Channel.getState(Address, String, long)
>> Is the issue that you're changing the API of the 2 getState calls to 
>> throw an exception instead of returning boolean?
> 
> Yes
> 
>> Is that absolutely necessary?
> 
> Yes. But remember, this is a new method, we do *not* overload the 
> existing connect().
> 
> 

Still confused; this and your answer to the above seem to contradict. 
But no matter, I'll understand when I look at the API. :) Key thing is 
2.5 and 2.6 can't interoperate.

>> Changes to any other overloaded flavors of connect or getState don't 
>> matter since we don't call them.
>>
>> Or is the issue more that the connect+getState stuff will change the 
>> way connecting and state transfer work so much that 2.6 will never be 
>> interoperable with 2.5? Kind of the old "AS 4.0.x forever stuck on 
>> 2.2.7" problem.
> 
> Yes exactly. My main beef is that we have something stable (API and 
> implementation wise) that we can include in AS 5, so why not do it ?
> 


-- 
Brian Stansberry
Lead, AS Clustering
JBoss, a division of Red Hat
brian.stansberry at redhat.com