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Bloc Concurrency

A Dart package that exposes custom event transformers inspired by ember concurrency. Built to work with bloc.

Event Transformers

bloc_concurrency provides an opinionated set of event transformers:

concurrent - process events concurrently
sequential - process events sequentially
droppable - ignore any events added while an event is processing
restartable - process only the latest event and cancel previous event handlers

Usage

import 'package:bloc/bloc.dart';
                import 'package:bloc_concurrency/bloc_concurrency.dart';
                
                sealed class CounterEvent {}
                
                final class CounterIncrementPressed extends CounterEvent {}
                
                class CounterBloc extends Bloc<CounterEvent, int> {
                  CounterBloc() : super(0) {
                    on<CounterIncrementPressed>(
                      (event, emit) async {
                        await Future.delayed(Duration(seconds: 1));
                        emit(state + 1);
                      },
                      /// Specify a custom event transformer from `package:bloc_concurrency`
                      /// in this case events will be processed sequentially.
                      transformer: sequential(),
                    );
                  }
                }

Dart Versions

Dart 2: >= 2.12

Maintainers

Felix Angelov

Changelog

0.2.5

docs: improve diagrams
chore: update copyright year
chore: update sponsors

0.2.4

chore: update sponsors

0.2.3

chore: fix require_trailing_commas
chore(deps): upgrade to package:mocktail v1.0.0
chore: add topics to pubspec.yaml

0.2.2

docs: upgrade to Dart 3
refactor: standardize analysis_options

0.2.1

chore: add screenshots to pubspec.yaml
refactor: upgrade to Dart 2.19
- deps: upgrade to very_good_analysis 3.1.0
docs: update example to follow naming conventions

0.2.0

feat: upgrade to bloc: ^8.0.0

0.2.0-dev.2

feat: upgrade to bloc: ^8.0.0-dev.5

0.2.0-dev.1

feat: upgrade to bloc: ^8.0.0-dev.3

0.1.0

feat: upgrade to bloc: ^7.2.0

0.1.0-dev.2

feat: upgrade to bloc: ^7.2.0-dev.2

0.1.0-dev.1

feat: initial development release
- includes EventTransformer options:
  - concurrent: process events concurrently
  - sequential: process events sequentially
  - droppable: ignore any events added while an event is processing
  - restartable: process only the latest event and cancel previous handlers

bloc_concurrency