TaskTree

Qt Task Tree - generic solution for automatic management of asynchronous tasks (C++), by Jarek Kobus

TaskTree automatically manages a chain (or a tree) of asynchronous tasks of mixed types, including running processes, network queries, functions in separate threads, animations, timers, and so on... It's easily extensible with any other types of asynchronous tasks.

The recipe on how to create, run and manage the conglomerate of tasks is described in a declarative way in C++.

The recipes are enclosed in copyable value-type objects and may be run many times, or be part of more general recipes.

The TaskTree is broadly used in QtCreator, for executing Build / Deploy / Run configurations, Locator filter, Clang tool, VCS commands, Autotests, driving Axivion plugin's communication and much more...

The TaskTree will be included in Qt 6.11 as a new QtTaskTree module.

Notes from the presentation/discussion at Qt Contributors Summit 2023: TaskTree CS23

Notes from the presentation/discussion at Qt Contributors Summit 2024: QtCS2024 TaskTree

More Info

Content	Link	Additional Info
Presentation '24	https://qt-wiki-uploads.s3.amazonaws.com/images/5/56/TaskTreePresentation.pdf
Documentation	https://doc-snapshots.qt.io/qt6-dev/qttasktree-index.html	Ref docs: https://doc-snapshots.qt.io/qt6-dev/tasktree-module.html
Sources	https://code.qt.io/cgit/qt/qttasktree.git/
Autotests	https://code.qt.io/cgit/qt/qttasktree.git/tree/tests/auto/tasktree	Includes more than 250 test cases
Demo	https://github.com/qt-creator/qt-creator/tree/master/tests/manual/tasking/demo
AssetDownloader	https://codereview.qt-project.org/c/qt/qtbase/+/565933	Patch replacing the old implementation of the asset downloader with TaskTree employed (TaskTree used in Qt 6.8 privately)
ImageScaling	https://github.com/qt-creator/qt-creator/tree/master/tests/manual/tasking/imagescaling	An alternative implementation of https://doc.qt.io/qt-6/qtconcurrent-imagescaling-example.html using TaskTree
ImageScaling diff	https://codereview.qt-project.org/c/qt-creator/qt-creator/+/481573	Difference in the implementation of the ImageScaling example using QFuture::then() and TaskTree
TrafficLight	https://github.com/qt-creator/qt-creator/tree/master/tests/manual/tasking/trafficlight	An alternative implementation of https://doc.qt.io/qt-6/qtscxml-trafficlight-widgets-static-example.html using TaskTree
DataExchange	https://github.com/qt-creator/qt-creator/tree/master/tests/manual/tasking/dataexchange	An example of a reusable TaskTree recipe
Suggestions	https://bugreports.qt.io/issues/?jql=project%20%3D%20QTBUG%20AND%20component%20%3D%20%22Task%20Tree%22

The first public TaskTree presentation on Sep 28th 2023 at Felgo office, Vienna.

TaskTree presentation in Technopark Pomerania at the invitation of Spyrosoft on Oct 18th 2023.