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"ignore" list feature on bindings [message #1528142]

Thu, 25 December 2014 15:04

Karel Goderis

Messages: 198
Registered: March 2014

Senior Member

All,

Assume we have

Item test {channel="x:y:z:", channel="a:b:c"}

it would be a great feature to have a configurable switch for the binding that if "x" and "a" would be equal, that an Update or Command received in a given channel would NOT be used to update the other channels if x==a, e.g. id the bindingID of the channels are equal, then updates/commands are not sent to the other channels

Use case: KNX binding, in order to prevent sending back data to the bus that is already received

I am currently implementing by queuing the ItemChannelLink registry, but I think it could be generalised, no? and be added to the ThingManager ( I think)

Or should that be dealt on a channel by channel level rather than at the the binding level?

Karel

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Re: "ignore" list feature on bindings [message #1532100 is a reply to message #1528142]

Sat, 27 December 2014 21:08

Kai Kreuzer

Messages: 673
Registered: December 2011

Senior Member

Hm, isn't it enough to have it on a channel level? This is actually already implemented for status updates, see https://github.com/eclipse/smarthome/blob/master/bundles/core/org.eclipse.smarthome.core.thing/src/main/java/org/eclipse/smarthome/core/thing/internal/ThingManager.java#L185.

There is no proper handling of commands in the ThingManager yet, though, so this is something that needs to be added (I've added an issue for this: https://bugs.eclipse.org/bugs/show_bug.cgi?id=456226).

Regards,
Kai

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Re: "ignore" list feature on bindings [message #1534886 is a reply to message #1532100]

Mon, 29 December 2014 11:03

Karel Goderis

Messages: 198
Registered: March 2014

Senior Member

Nope. It should also be possible to have this at the binding level. Even as the channel in question does not receives back the State update, other channels of the same kind (better: connected to the same physical bus) will receive the update, and will possibly put it back on the physical bus. Since it is not always know beforehand how the channels of the same kind are bound to an item, this can lead to weird effects (e.g. sending out a telegram to a read only actor will not have effect, but it could equally be something an actor picks up and reacts upon).

Tx for adding the issue to the list

K

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