Eclipse Community Forums: Eclipse SmartHome » Limit to single instance of a Thing in binding

Home » Archived » Eclipse SmartHome » Limit to single instance of a Thing in binding

Limit to single instance of a Thing in binding [message #1744616]

Wed, 28 September 2016 18:53

Eclipse User

Would like suggestions on where and how to implement this. I have a bridge (B) which can only have a single instance of a particular thing type (T). I was looking at overriding the createThing function to make sure B does not already have a T instantiated.

The createThing function gets passed a BridgeUID to the function, but how do I get the Bridge Thing in order to call getThings() to see if one is already instantiated?

Is there a better/alternative way to accomplish this?

Thanks,
Jeff

Re: Limit to single instance of a Thing in binding [message #1744800 is a reply to message #1744616]

Fri, 30 September 2016 05:58

Eclipse User

What exactly is it that you want to prevent/achieve?

You e.g. cannot prevent that users define any number of Things of the same type in a *.things file and associate them to your bridge. So you will have to deal with this in your handler implementations when they are initialized. Within the handler, you have access to the bridge handler, so you can report a configuration error and not put the Thing to ONLINE.

Regards,
Kai

Re: Limit to single instance of a Thing in binding [message #1744842 is a reply to message #1744800]

Fri, 30 September 2016 13:05

Eclipse User

Hi Kai - Thanks for the response.

I'm writing a binding to interface with Pentair pool equipment. There should only be a single controller on their control bus and since I'm not testing the binding in the case someone creates 2 controller things, the results are not predictable. So, I'd rather just prevent that configuration from being setup by someone.

Jeff

Previous Topic:	Binding Transformation
Next Topic:	Upnp Discovery issue

Goto Forum:

-=] Back to Top [=-

Current Time: Mon Jul 21 05:10:45 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter