Questions about writing rules

[sambuddy200471 (Stuart O'reilly)]

Hello All,
I am currently trying to write a rule that will process some xml that is returned by an http request (using openhab 1.0). While going through this learning exercise I have come up with the following questions I hope someone can answer for me.
1: When writing rules, how do you know what imports to include at the top of the file?
2: Can I import any java library?
3: Is there a list of imports that are available that i can use?
4: When you write a rule like this

when
    item (item name) trigger
then
    (do something)
end

How do you know what triggers are available for that item?

Thanks for your help
Regards
Stuart

[ThomDietrich]

Hey!

1: If you use a special datatype or method not covered by the imports you already have, you need to include the import. The Designer will help you understand that better.

4: https://github.com/openhab/openhab/wiki/Rules#rule-triggers

[sihui]

@sambuddy200471

1: When writing rules, how do you know what imports to include at the top of the file?

[Solved] Rules not working

Figuring out the imports is a bit tricky in OH 1. In OH 2 you barely have to import anything any longer so it is much easier. So here is short list of some standard imports. org.openhab.model.script.actions.* : to use Timers org.openhab.core.library.types.* : use when you need to cast to a specific type of state (e.g. use “as DecimalType”) org.openhab.core.library.item.* : use when you need to cast to a specific type of Item (e.g. use “as NumberItem”) org.joda.time.* : use when you need to cr…