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Re: [paho-dev] Java client: per subscription message handling callbacks
Hi Ian,

I refer you to the first line of your previous answer :) You're right, it would be undesirable in that situation, but it's a bit of an edge case.

Cheers,

Roger




On Wed, May 6, 2015 at 2:42 PM, Ian Craggs <icraggs@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi Roger,

in the case of a server sending out a message for each matching subscription, this would result in a proliferation of messages, which seems undesirable to me.

Ian



On 05/06/2015 02:39 PM, Roger Light wrote:
Hi,

The Python client does this and checks every callback filter to see if it matches, and hence will deliver a single message to multiple callbacks if they overlap. It will deliver the message to the "global" callback if it does not match any of the filtered callbacks.

Cheers,

Roger


On Wed, May 6, 2015 at 2:30 PM, Marc L Cohen <mlcohen@xxxxxxxxxx> wrote:

What is the proposal for deciding which subscription if the topic matches more than one subscription and the server only sends one message, or if it sends one per subscription?


Marc L. Cohen
MessageSight Test/Development
Internet:mlcohen@xxxxxxxxxx
also at:teddybbear@xxxxxxx
(512) 286-5744 (T/L 363-5744)
FAX (512) 973-4293

Inactive hide details for Ian Craggs ---05/06/2015 08:13:13 AM---I'm proposing to add per subscription message handling callbacIan Craggs ---05/06/2015 08:13:13 AM---I'm proposing to add per subscription message handling callbacks to the  Java client.

From: Ian Craggs <icraggs@xxxxxxxxxxxxxxxxxxxxxxx>
To: General development discussions for paho project <paho-dev@xxxxxxxxxxx>
Date: 05/06/2015 08:13 AM
Subject: [paho-dev] Java client: per subscription message handling callbacks
Sent by: paho-dev-bounces@xxxxxxxxxxx




I'm proposing to add per subscription message handling callbacks to the
Java client.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=466579

This will mean having to parse and match the incoming topics, as MQTT
does not send the subscription topic with each message, but the topic on
which the original message was published.  I have some simple code that
does that in the embedded C++ client however.

Any thoughts or comments welcome, here or in the bug....

Thanks

--
Ian Craggs
icraggs@xxxxxxxxxx                 IBM United Kingdom
Paho Project Lead; Committer on Mosquitto

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-- 
Ian Craggs                          
icraggs@xxxxxxxxxx                 IBM United Kingdom
Paho Project Lead; Committer on Mosquitto

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