| Re: [paho-dev] Java client: per subscription message handling callbacks |
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I know of at least one server that does send the message to each subscription. Hi Roger, good point :-) The embedded client stops at the first match. But in that case I want to take every step to minimize processing and resource usage, so it seems like the right thing to do. I guess if it's an edge case, it may not matter, as long as we are clear what the behaviour is. Let's see if we get any votes... Ian On 05/06/2015 02:47 PM, Roger Light wrote:
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:
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:
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:
Marc L. Cohen MessageSight Test/Development Internet:mlcohen@xxxxxxxxxx also at:teddybbear@xxxxxxx (512) 286-5744 (T/L 363-5744) FAX (512) 973-4293 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 _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev -- Ian Craggs icraggs@xxxxxxxxxx IBM United Kingdom Paho Project Lead; Committer on Mosquitto _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev -- Ian Craggs icraggs@xxxxxxxxxx IBM United Kingdom Paho Project Lead; Committer on Mosquitto _______________________________________________ paho-dev mailing list paho-dev@xxxxxxxxxxx To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/paho-dev |
