How to send data to the main isolate from workmananger's isolate?


My problem is that flutter Hive cannot be opened from multiple isolates. So I want the data fetched in workmananger task to be sent to the main isolate where the hive box is opened and modify it there to avoid corrupting it. I should take into consideration when the app is alive and when it is not => for example when the app is not alive, I edit the hive file directly since it will be only opened in the workmanager isolate whereas if the app is not alive I send the data to the main isolate and edit the hive file. My problem is that I do not know how to track lifecycle within the workmanager task and I do not know how to send the data to the main isolate. Any workarounds or solutions for the problem or how to code the above? Thank you in advance.


After some research the solution is as follows:

First you register a port on the initialization of the main isolate like this:

void listenToUpdatesFromWorkManager(String name) { var port = ReceivePort(); IsolateNameServer.registerPortWithName(port.sendPort, name); }

You give it a unique name in order to identify it from any other opened isolates like this:

SendPort sendPort = IsolateNameServer.lookupPortByName(name);

Answered By – anass naoushi

Answer Checked By – Senaida (FlutterFixes Volunteer)

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