Dispatch store action from an isolate callback?

[AAverin]

I am using flutter_downloader package to download some big files from the network in a nice manner.
When download task finishes library calls it's static download callback in a background isolate that is then uses ReceivePort to send a message to the main thread(isolate).

Problem is, all the code around this is now written in a singleton Manager class that is not a Widget.
When message that task download finished is published I need to somehow dispatch a store event that my download is finished so I could update UI properly.

How can I do that?

[raulccabreu]

You can use a middleware solve this, they are redux way to handle async and another system calls.

Here a doc on how to use middlewares, from redux.dart: https://github.com/fluttercommunity/redux.dart/blob/master/doc/async.md