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Kura Services OsGI-Inf Metatype xml Editing [message #1770105]

Tue, 08 August 2017 11:51

Erdem Tuna

Messages: 9
Registered: August 2017

Junior Member

Hi,

I've tried to edit value of a key component of the xml file in the metatype with "properties.put" and "properties.replace". However, when I call these functions, related key value is not being edited and relevant web UI in Kura disappears but bundle keeps running. For the sake of example, referring to "org.eclipse.kura.demo.heater", If I want to edit value of the "program.startTime" from the main code by typing

properties.replace("program.startTime", "08.00")

properties.put("program.startTime", "08.00")

, it doesn't make any effect on the value of the key. However, I can display the value of "program.startTime" by typing

properties.get("program.startTime")

The value can obviously be edited through web UI but, I want to ask that is it possible to edit a value of the key that is present in the xml file from the main code?

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Re: Kura Services OsGI-Inf Metatype xml Editing [message #1770106 is a reply to message #1770105]

Tue, 08 August 2017 11:55

Matteo Maiero

Messages: 423
Registered: July 2015
Location: Italy

Senior Member

Hi,
if you want to have your property persisted, you need to apply that change using the ConfigurationService APIs.

There are quite a few references in the code. And the same APIs are used by the web ui as well.

Best regards

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Re: Kura Services OsGI-Inf Metatype xml Editing [message #1770126 is a reply to message #1770106]

Tue, 08 August 2017 14:15

Erdem Tuna

Messages: 9
Registered: August 2017

Junior Member

Thanks Matteo for the answer, but "properties.put", "properties.replace", "properties.remove" are all giving "messagenull" exception when I run them inside the code. As I understand "properties.xyz" is the right way to edit a key value and ConfigurationService API is the right way to save the change. Although "properties.get" does what it's supposed to, the rest gives exception. Could you please be more specific, Matteo?

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Re: Kura Services OsGI-Inf Metatype xml Editing [message #1770146 is a reply to message #1770126]

Tue, 08 August 2017 15:26

Matteo Maiero

Messages: 423
Registered: July 2015
Location: Italy

Senior Member

Hi,
the properties received by the component can be changed like you said (I would prefer doing a copy though).
To persist them you need to take a dependency from the configuration service using the declarative services and invoke a method like "updateConfiguration" to update the configuration persisted by the framework.

An example you can take as reference: https://github.com/eclipse/kura/blob/develop/kura/org.eclipse.kura.core/src/main/java/org/eclipse/kura/core/ssl/SslManagerServiceImpl.java#L626

Best regards

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