cancelation_token

Description:

cancelation token

cancelation_token #
This package provides an interface for cancelation tokens as well as various implementations:

CancelableToken which can be canceled programmatically;
CompositeToken which is canceled when any or all tokens are canceled;
TimeoutToken which is canceled after a timeout period.

Example #
Cancel a long-running execution after a timeout.
import 'package:cancelation_token/cancelation_token.dart';

void main() async {
final timeout = Duration(seconds: 5);
final errorOnTimeout = CanceledException.withStackTrace('Too long!');
final token = TimeoutToken(timeout, errorOnTimeout);
token.ensureStarted();

try {
await longProcess(token);
} on CanceledException catch (ex, st) {
print(ex.message);
print(ex.stackTrace);
print(st);
}
}

Future<void> longProcess(CancelationToken token) async {
// very long indeed!
while (true) {
token.throwIfCanceled();
await Future.delayed(const Duration(milliseconds: 100));
}
}
copied to clipboard