'Runtime is active on another thread' error with Chakra and WebView control combination about chakra-samples HOT 13 CLOSED

Just to add, there's nothing special about navigating to the Monaco editor. If I navigate to www.google.com the same thing happens. I'm going to take the example UWP project posted here, and try the above just to exclude anything particular to my project setup.

from chakra-samples.

Yep I can replicate this with the UWP example.

Steps:

1. Add a WebView control to MainPage.xaml
2. Change MainPage.cs to this:

public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            WebView.DOMContentLoaded += WebView_DOMContentLoaded;
            WebView.Navigate(new Uri("http://www.google.com"));
        }

        private void WebView_DOMContentLoaded(WebView sender, WebViewDOMContentLoadedEventArgs args)
        {
            new ChakraHost.ChakraHost().init();
        }
    }

1. Change debugger type in project settings to Application Process: 'Managed Only'
2. Run and step through execution. Call to Native.JsCreateContext(runtime, out context) will fail

This looks like a significant problem unless I'm missing something? Thanks.

from chakra-samples.

Error is normal since WebView also creates the Runtime.

from chakra-samples.

OK so two runtimes. But they don't operate in isolation?

from chakra-samples.

One runtime, multiple context ?

from chakra-samples.

OK, to rephrase, how do I use the WebView and Chakra Engine together without raising ''Runtime is active on another thread' errors. :) If I'm working with the Chakra engine yes I can create multiple contexts. The problem is creating contexts in the first place if I have a WebView active which seems to be hogging the runtime.

from chakra-samples.

Didn't use WebView. If you are on the same thread with WebView (which is IIRC to be main thread??) You may get the active context by calling JsGetCurrentContext and using that Context, you may grab the Runtime objectJsGetRuntime.

Just a suggestion. Didn't try it.

from chakra-samples.

This assumes a shared runtime though. I thought the whole point was to be able to create separate isolated runtimes. Surely if I explicitly create a new runtime this should not interact with the runtime created by the WebView. Anyway I'll investigate a bit more, thanks.

from chakra-samples.

Great. Please share your experiences back. It may help others :) Keeping this open for a while then.

from chakra-samples.

Please keep this open. I haven't yet found a way to use the WebView control and Chakra engine together in a UWP app. This seems like a significant issue. Hopefully someone will be able to shed some light.

Thanks

from chakra-samples.

/cc @munyirik ?

from chakra-samples.

OK I think I've found the problem. In the example above I'm creating a runtime on the UI thread (the same thread as the WebView).

If I do one of the following I can successfully create a new context on a new runtime.

Either

1. Run the WebView on a separate thread ( some limitations)

2. Create the Chakra runtime on a separate thread. e.g. Task.Run(()=>new ChakraHost.ChakraHost().init()) in the above example;

Phew. Happy to close :)

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Perfect!

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