HelloWorld

You're now ready to write your first Squadron service. It can be as simple as:

// file hello_world.dart
import 'dart:async';
import 'package:squadron/squadron.dart';
import 'package:squadron/squadron_annotations.dart';
import 'hello_world.activator.g.dart';

part 'hello_world.worker.g.dart';

@SquadronService()
class HelloWorld {
    @SquadronMethod()
    Future<String> hello([String? name]) async {
        name = name?.trim();
        if (name == null || name.isEmpty) {
            return 'Hello, World!';
        } else {
            return 'Hello, $name!';
        }
    }
}

Use build_runner to generate the worker code:

dart run build_runner build

You're now ready to execute the service in a separate thread and call it from your application's main thread:

// file main.dart
import 'hello_world.dart';

void main() async {
    final worker = HelloWorldWorker(); // instantiate a worker thread for HelloWorld
    await worker.start(); // optional - Squadron will automatically start workers as necessary
    print(await worker.hello());
    print(await worker.hello('Mary'));
    print(await worker.hello('John'));
    worker.stop(); // required to terminate the worker and stop the program
}