[infinispan-dev] Hot Rod - pt3

[Manik Surtani]

On 4 Jan 2010, at 21:44, Alex Kluge wrote:

>>> - No events. I used events, that is asynchronous messages originating
>>>   from the server when certain conditions are met, to notify clients
>>>   that data was written to the server.  This was mostly driven by the
>>>   need to notify an L1 cache of a write to the cache server. It would
>>>   be good to allow for this usage in this protocol. Note that this is
>>>   another case where the op code is useful to have as part of the
>>>   message.
>> 
>> Isn't this expensive?  Doesn't this mean the server
>> has to fire off messages to each and every connected client,
>> whether the clients are interested in these messages or
>> not?
> 
>  Not necessarily. There are a number of options. It wouldn't be
>  difficult to allow the clients to register for the events, and
>  then only send them to the interested clients. The events can
>  be sent asynchronously (a separate thread), thus they won't
>  delay the response to a write. Piratically speaking, they aren't
>  that expensive.

Makes sense.  

--
Manik Surtani
manik at jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
http://www.jbosscache.org