Request Update from outside of bevy

[ProfFan]

Hello all,

I am trying to create an app that receives events from an external message source, and update the visualization according to the data received. However, it seems that there is no way to trigger redraw from outside bevy.

What I have tried:

• a system that blocks (obviously not working)
• a system that polls a queue like https://github.com/bevyengine/bevy/blob/main/examples/async_tasks/external_source_external_thread.rs

The issue I have now is that if I use the Reactive update mode the system receives messages does not fire until Update.

Any help is really appreciated!