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Thing Added/Removed notification [message #1755404]

Fri, 03 March 2017 03:05

Tim Roberts

Messages: 29
Registered: September 2016

Junior Member

If I have a bridge handler - is there a way to be notified when child things are added/removed?

I know there is a thingRegistry.addRegistryChangeListener - but that doesn't appear to be a public api method (Access Restriction...is not API).

What's the correct way of doing this (or do I just turn off that warning and use it anyway)?

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Re: Thing Added/Removed notification [message #1755414 is a reply to message #1755404]

Fri, 03 March 2017 07:46

Kai Kreuzer

Messages: 673
Registered: December 2011

Senior Member

You should not care to much about child things themselves, usually you want to know as soon as there is a handler instance up and running (which automatically happens if new child things are created anyway).

And you are informed about initialized and disposed handlers, see BridgeHandler.childHandlerInitialized() and BridgeHandler.childHandlerDisposed().

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Re: Thing Added/Removed notification [message #1755449 is a reply to message #1755414]

Fri, 03 March 2017 12:42

Tim Roberts

Messages: 29
Registered: September 2016

Junior Member

That's exactly what I needed - thanks!

Side question - I have a bridge channel that can potentially include information from a child thing channel - is it possible for the bridge to listen for state update notifications from a child?

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Re: Thing Added/Removed notification [message #1755470 is a reply to message #1755449]

Fri, 03 March 2017 14:53

Kai Kreuzer

Messages: 673
Registered: December 2011

Senior Member

Not directly, but as the bridge handler receives the child handler, it has a change to register itself as a listener (with some custom interface specific to your binding) on it.

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Re: Thing Added/Removed notification [message #1755493 is a reply to message #1755470]

Fri, 03 March 2017 19:27

Tim Roberts

Messages: 29
Registered: September 2016

Junior Member

Yep - that's the approach I took actually. Thanks

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