Accessing Non-RN-core Native packages in a worker thread.

Hello, Thanks for the fabulous work done on this topic.

Is there any way we can integrate an additional non-RN-core native package into a worker?

We are trying to create a worker that reads the phone-book (a processing-heavy op) and store results for quicker retrieval later.

Outline of my code:

index.worker.js:

import { WorkerService } from 'rn-workers'
import ContactsBackground from './ContactsBackground';
const worker = new WorkerService();

worker.onmessage = (message) => {
	//Start the worker and pray!
	console.log('Inside worker - outermost');
	ContactsBackground.start();
}

Main worker - ContactsBackground.js:

module.exports = {
	start: function(){
		var Contacts 	= require('react-native-contacts'); //External module of interest
		
		Contacts.getAll((err, contacts) => {

	        // Do something

		});
	}
}

The system setup is pretty smooth but the worker halts at Contacts.getAll(…) with a message that Contact.getAll is undefined. (Link to module readme: https://github.com/rt2zz/react-native-contacts )

Any help is very much appreciated.

[fabriciovergara]

In iOS all RN Packages are “singletons”, so when you create a worker, all custom packages will be automatically linked to this worker.

[guns2410]

How do we do this in iOS