[Openais] Best solution for safe request / reply protocol

[Fabien THOMAS]

thanks for all your comments :)

Le 21 août 06 à 22:45, Steven Dake a écrit :

> On Fri, 2006-08-18 at 16:05 +0200, Fabien THOMAS wrote:
>> I would like to do a simple application to remotely execute an action
>> and wait for a result.
>
>> I've seen some different messaging API in openais (evs, evt, msg) and
>> i would like to known what is the best method to do that.
>>
>
> The best solution here is to use the MSG service for this task.
> Unfortunately the MSG service is incomplete at this time and won't  
> work
> for your purpose.
>
> Another option I suggest is to use the CPG service directly.  Have the
> client and server join a cpg group (this is the channel).  Client  
> sends
> request.  When server receives request, it replies on the same process
> group.  The process group id is stored in the reply message is used by
> the client to determine if the reply is for itself or some other node.
> The same thing could be done with the evs service.  Each message has a
> header id which can be 0 = request 1 = reply.
>
> Regards
> -steve
>
>> the protocol will look likes that:
>>
>> client:
>>
>> open channel to <id>
>> send request (here i would like to be sure the message is delivered
>> but it seems that safe message is not implemented ?)
>> wait for reply
>> close channel
>>
>> server:
>>
>> create channel <id>
>> loop:
>> 	wait for request
>> 	doit
>> 	send reply
>>
>> Maybe someone can help me to make the best choice.
>>
>> Regards,
>> Fabien
>> _______________________________________________
>> Openais mailing list
>> Openais at lists.osdl.org
>> https://lists.osdl.org/mailman/listinfo/openais
>
>