use_isolate 0.3.0+1

A Hook wrapper of integral_isolates making multi-threading easy using hooks

The power of integral_isolates neatly packed up in a hook.

Usage

Using an isolate in a hook has never been simpler. With the use of useIsolate() you can get a compute function similar to compute but that lives longer. You don't have to care about lifecycle, the hook handles that for you.

Example:

class TestingIsolateHook extends HookWidget {
  const TestingIsolateHook({super.key});

  @override
  Widget build(BuildContext context) {
    final isolate = useIsolate();
    final number = useState(1);

    return TextButton(
      onPressed: () async {
        final isPrime = await isolate.compute(_isPrime, number.value);
        print('${number.value} is a prime number? ${isPrime}');
        number.value += 1;
      },
      child: Text(
        'Check if ${number.value} is a prime number',
      ),
    );
  }

  static bool _isPrime(int value) {
    if (value == 1) {
      return false;
    }
    for (int i = 2; i < value; ++i) {
      if (value % i == 0) {
        return false;
      }
    }
    return true;
  }
}

Just as integral_isolates, this hook supports backpressure strategies, just send a strategy in as parameter:

final isolate = useIsolate(backpressureStrategy: DiscardNewBackPressureStrategy());

What about TailoredStatefulIsolate?

You might know that you can create tailored stateful isolates with integral_isolates. This is now also possible with use_isolate.

To create a tailored isolate that takes a double as the input parameter and returns an int, just use this hook instead:

final isolate = useTailoredIsolate<double, int>();

Breaking change

• use_isolate v0.3.0: now returns the whole isolate, requiring you to explicitly type out isolate.compute(..) instead of just isolate(..). This is due to support for isolate.computeStream(..) is added.

Additional information

You could expect this API to be mostly stable, but implementation of the underlying package (integral_isolates) is not fully finalized yet, and there is more features coming before both packages can count as stable.