I’m having issues with the DataModel. Anything I set and get using model.get() and model.set() is only stored in the specific node. My URCap is structures as 1 parent node and 4 child nodes, and if I set() something in the parent node, the get() will return the default value in the child node. My q…

Thank you for the reply. So I can’t access the datamodel from a different node? Can I share variables between node in any way then?

Do you really need the DataModel? You can create a singleton object that stores the information that you need, with a public static getter that you can use anywhere in your code. You can check a sample implementation here: Java Singleton Design Pattern Best Practices with Examples | DigitalOcean . …

Anything that should be accessible by the user should preferable be stored in the DataModel. The DataModel is part of the program and installation files, so if you do not store your data here, the data will only be stored locally, and the user will have to reconfigure this again on a new robot. If…

How do I use the URCap Custom API?

Check out the section “URCap Program Node proprietary API” in the “program node configuration” document in the SDK.

Thank you, I’ve read the pdf, but does still have a few questions: So basically by implementing a Custom API on the child node, it is possible to access methods from the parent node? To implement this I have to define this interface with the lines: interface CustomAPI { Setting getSetting (); v…

i would also recommend using a singleton object to handle the datamodel object between your Contributions as @anon16416181 said. Just initialize the datamodel by the parent/master node and save the datamodel object reference to the singleton object. I found the CustomAPI solution awkward and didn’…

I thought I would just share what I found out, after I got it to work: So you have to declare an interface the so called “CustomAPI” and in here you will have to declare what methods you want to use. What confused me was the things defined inside “interface CustomAPI { … }” in line 3-7 of the atta…

@anon53303193 , Thanks a lot for sharing your gained knowledge, from working with this interface.

DataModel is not shared between nodes

URCap Development Java

jbm September 20, 2018, 11:16am 2

Each URCap node has its own DataModel, which is not shared with any other node.

Communication between caps

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DataModel is not shared between nodes

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