[infinispan-dev] hotrod client - initial connection

[Mircea Markus]

On 10 Mar 2010, at 18:21, Galder Zamarreno wrote:

> On Wed, 10 Mar 2010 14:08:23 +0100, Mircea Markus  
> <mircea.markus at jboss.com> wrote:
> 
>> Hi Galder,
>> 
>> Here are some thoughts I have about how the hotrod client performs  
>> initial connection to the HR servers:
>> A list of servers is statically configured so that the client can  
>> connect to any of them
>>             1. client will ping each configured server until it finds  
>> one that is up and running
>>             2. at this point it will stop(i.e. not query other  
>> statically configured servers) and query this server for the cluster  
>> topology
> 
> The idea was that rather than querying for the cluster topology, the  
> client would register for notification it's interested in. From the wiki:
> 
> "Before any the server can send any notifications, clients need to  
> register and indicate which events they're interested in. To do that, they  
> have to send a request like this:
> 
> [request header][events]"
> 
> So, if a client was interested in topology change notifications, it would  
> tell the server accordingly.
Isn't the event handling optional? if so, some clients (ones that do not implement event handling) would not be able to get the view?
> 
>>             3. a a response to this query, the server informs the  
>> client about hotrod cluster topology (which might be different than  
>> infinispan cluster, right?)
> 
> Although not specified in the wiki, I would assume that once you register  
> with the server, the server would push the current topology, no need for  
> further requests from client.
> 
>>             4. based on this information client builds a pool of  
>> connections to the servers
>>             5. client register itself as cluster formation listener,  
>> and update the list of active servers whenever the topology changes
>> (cluster formation might not be the best name for this listener as it  
>> only refers to the time when cluster is formed, what about cluster  
>> topology listener?)
> 
> You'd still need a listener like the one you mention based on the  
> information received from the server(s).
> 
>> How does this sound to you?
>> </snip>
>> 
>> Cheers,
>> Mircea
>> _______________________________________________
>> infinispan-dev mailing list
>> infinispan-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
> 
> 
> -- 
> Galder Zamarreño
> Sr. Software Engineer
> Infinispan, JBoss Cache
> 
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