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Mon, 28 September 2020 20:29

Eclipse User

Hi all,

i read kura docs and tryng to find in source code. I know by default with CloudServicePublisher kura pubs in #account-name/#device-id/#app-id/<app-topic> and in $EDC/<account-name>/<device-id>/<app-id>/<method>/<resource-path> if control data message. I need to change this template to simplify communication with my cloud service. Is there any easy way to do it, not to create my own CloudEndpoint.

Regards

Re: custom topic [message #1832910 is a reply to message #1832895]

Tue, 29 September 2020 03:03

Eclipse User

Hi,
the structure <account-name>/<device-id>/<app-id>/<app-topic> cannot be changed if not with a new cloud service bundle that needs to be created with your new structure.

As far as I know, the only thing you can decide is the control topic prefix that you can change in the cloud connection preferences plus other minor changes. But the topic structure, as of now, is fixed in the default cloud connection.

Best regards,
Matteo

Re: custom topic [message #1832915 is a reply to message #1832910]

Tue, 29 September 2020 05:56

Eclipse User

This news are not very good(

Thanks for the reply!
Regards.

Re: custom topic [message #1832973 is a reply to message #1832915]

Wed, 30 September 2020 04:49

Eclipse User

Use the dataService inside your bundle. With the dataService you can publish messages with your own topic.

[Updated on: Wed, 30 September 2020 04:49] by Moderator

Re: custom topic [message #1832979 is a reply to message #1832973]

Wed, 30 September 2020 05:19

Eclipse User

i wanna try to do this:
for the template take org.eclipse.kura.cloudconnection.eclipseiot.mqtt.provider
change there this string
sb.append(topicPrefix).append(topicSeparator).append(topicSeparator);
then append there account and client id tokens.
So i have forvarding question:
in publishDisconnectCertificate() or the same functions we put in topic tokens, such as #account-name, do default DataService changes them to the values seted in config?
bsc in source code topic made by this :
sbTopic.append(this.options.getTopicControlPrefix()).append(CloudServiceOptions.getTopicSeparator())
.append(CloudServiceOptions.getTopicAccountToken()).append(CloudServiceOptions.getTopicSeparator()) .append(CloudServiceOptions.getTopicClientIdToken()).append(CloudServiceOptions.getTopicSeparator())
.append(CloudServiceOptions.getTopicDisconnectSuffix());
and then called:
this.dataService.publish(topic, ...
without any render templates.

Thx for soon answer,
Best regards

Re: custom topic [message #1847846 is a reply to message #1832973]

Wed, 10 November 2021 05:18

Eclipse User

Hi,
can you spezify on how to use the DataService to change topics?
I am new to Kura and stuck with this issue. I need to connect to Hono using a different namespace.

Best regards,
Alessa

Re: custom topic [message #1847892 is a reply to message #1847846]

Thu, 11 November 2021 11:38

Eclipse User

"Hi, changing the way the topics are built in the CloudConnectionManagerImpl will definitely changes the topics syntax, the dataservice does not modify the topic.

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