Getting Error on the latest version

[sudharsan1988]

Hi @devfd , many thanks for the updated version :) I ran into some issues when I try to use the latest version,

I am using RN 0.30.0 on a Ubuntu 14.04.4 machine

Issue #1: RNPM link gives build error, so I went with manual and that worked for me

Issue #2: When I try to use "new Worker()", it throws an error saying that

Attempt to invoke virtual method 'android.app.Activity.getApplication()' on a null object reference'

Here is what I am doing,

I created a worker.js file on the same directory of my container and called the worker as follows,

`import { Worker } from 'react-native-workers';

/* start worker */ const worker = new Worker("./worker.js");`

Here is the content in my worker.js

`import { self } from 'react-native-workers';

/* get message from application. String only ! */ self.onmessage = (message) => { }

/* post message to application. String only ! */ self.postMessage("hello from worker");`

Am I missing something here?

[devfd]

do you have the same runtime error on the sample app ?

[sudharsan1988]

I tried the sample and it worked well. I found what I was missing.

1. I was trying to include the below code outside of the component class

`worker.postMessage("hello from application");

/* get message from worker. String only ! */ worker.onmessage = (message) => {

}`

but I changed it to below as per the example,

componentDidMount() { // create a new worker this.worker = new Worker('App/Containers/worker.js'); // receive messages from worker this.worker.onmessage = (message) => { console.log("Got message from worker", message); } }

2. I also made changes to the worker path as per the example

From:

const worker = new Worker("./worker.js");

I changed it to,

this.worker = new Worker('App/Containers/worker.js');

I really appreciate your help and sorry for the trouble :)

I also have another question, it works only when the app is active but I thought "worker" would work even the app is killed. Is there anyway we can make it work in the background even after the app is killed or in active?

[devfd]

on iOS there is no way to keep a worker active while in background. on Android it is possible using Service. The lib will be updated to allow Service creation.

[sudharsan1988]

@devfd , thanks again for your help. Yes, I am trying to get it done on Android. Very excited to see the updated version with Service creation.