[infinispan-dev] Hotrod client intelligence

[Mircea Markus]

On 20 Jul 2010, at 11:48, Manik Surtani wrote:

> 
> On 20 Jul 2010, at 11:45, Mircea Markus wrote:
> 
>> 
>> On 20 Jul 2010, at 11:29, Manik Surtani wrote:
>> 
>>> 
>>> On 20 Jul 2010, at 10:52, Mircea Markus wrote:
>>> 
>>>> Hi,
>>>> 
>>>> Right now we have the following intelligence levels in HR:
>>>> (0x01) basic client, interested in neither cluster nor hash information
>>>> (0x02) topology-aware client, interested in cluster information
>>>> (0x03) hash-distribution-aware client, that is interested in both cluster and hash information
>>> 
>>> Transaction aware clients have nothing to do with "intelligence" in that it doesn't affect the way clients discover or route connections to the back-end.
>> not in that sense.
>>>  Pls don't pollute this field with orthogonal characteristics.
>> Then transaction should be supported by all clients implementing the protocol? 
> 
> No, but if a client doesn't start a tx, then the backend doesn't care if the client can or cannot ever support transactions, right?

Each HotRod operation needs to contain the tx id, if it is part of a transaction. 
a) either we add this now, in 4.1, before protocol completes
b) or we add it in 5.0 together as per this JIRA. If so, server would need to be aware that client is transactional aware, hence the new intelligence level I was taking about
with b clients that don't support tx would't need to send an additional field. We had this discussion on a separate thread with galder, I can live with either one of the two. 
> 
> --
> Manik Surtani
> manik at jboss.org
> Lead, Infinispan
> Lead, JBoss Cache
> http://www.infinispan.org
> http://www.jbosscache.org
> 
> 
> 
> 
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