Use configurations in the HandlerFactory???

[JohannesR]

Hi,

i want to create a Binding for a serial device. I want that it is possible to enter the serial Port in the paper UI for every Thing. But the <BindingName>HandlerFactory just extends the BaseThingHandlerFactory, so it is not possible to get the manually entered Port for the NRSerialPort.connect.

Einmal auf deutsch, da mir die genaue Erklären meines Problems schwer fällt. Ich möchte, dass der Anwender in der Paper UI beim manuellen Erstellen eines Things den Port des Geräts angeben muss. Mit diesem Port soll sich das Thing dann in der <BindingName>HandlerFactory verbinden. Da die Methode getThing dort jedoch nicht zugänglich ist, komme ich nicht an die zuvor eingegeben Informationen ran, wie kann ich das möglich machen? Denke ich falsch?

Mit freundlichen Grüßen

Johannes

[Kai Kreuzer]

Hi Johannes,

I think you are looking at the wrong place. All you need to do is to implement the initialize() method of your ThingHandler (see https://www.eclipse.org/smarthome/documentation/development/bindings/thing-handler.html#lifecycle).

Within this method, you have access to the Thing configuration, which will contain the serial port information that you have provided through the Paper UI. Also note that this could be potentially changed at any time by the user, so you should also handle configuration updates (see https://www.eclipse.org/smarthome/documentation/development/bindings/thing-handler.html#handling-configuration-updates).

Best regards,

Kai

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[JohannesR]

Hi Kai, 

thanks for the fast answer, after i implement the thinghandler i can use the getThing()!

But now i have a nullpointerexception at:

portName = (String) getThing().getConfiguration().get(uvr2BindingConstants.CONFIG_PARAMETER_SERIAL_PORT); 

Console:

2015-08-04 00:27:20 [INFO ] [ome.event.ThingStatusInfoEvent:43   ] - uvr2:inputs:6b16c0c1' updated: INITIALIZING

2015-08-04 00:27:20 [INFO ] [ome.event.ThingStatusInfoEvent:43   ] - uvr2:inputs:6b16c0c1' updated: UNINITIALIZED (HANDLER_INITIALIZING_ERROR)

2015-08-04 00:27:20 [ERROR] [.c.thing.internal.ThingManager:457  ] - Exception occured while calling thing handler: nulljava.lang.NullPointerException: null

at org.openhab.binding.uvr2.internal.uvr2HandlerFactory.serialConnect(uvr2HandlerFactory.java:95)

I dont understand why i get this now?!

[Kai Kreuzer]

Hi Johannes,

You can use this code as a template: https://github.com/eclipse/smarthome/blob/master/extensions/binding/org.eclipse.smarthome.binding.hue/src/main/java/org/eclipse/smarthome/binding/hue/handler/HueLightHandler.java#L75

Then best use the debugger to step through the code and see what happens.

Regards,

Kai

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[JohannesR]

Thank You Kai for the Help, i got it now ;)

The HandlerFactory was the wrong place for what I wanted to do ;)

Now i do the connection in the handler and everything goes well!