Features

Async

• A futurist.GreenThreadPoolExecutor using eventlet green thread pools. It provides a standard executor API/interface and it also gathers execution statistics. It returns instances of futurist.GreenFuture objects.

• A futurist.ProcessPoolExecutor derivative that gathers execution statistics. It returns instances of futurist.Future objects.

• A futurist.SynchronousExecutor that doesn’t run concurrently. It has the same executor API/interface and it also gathers execution statistics. It returns instances of futurist.Future objects.

• A futurist.ThreadPoolExecutor derivative that gathers execution statistics. It returns instances of futurist.Future objects.

Delayed Execution

• A futurist.DelayedExecutorMixin that can be combined with any Executor subclass to add a submit_after(delay, fn, *args, **kwargs) method. A single background scheduler thread maintains a min-heap of pending tasks ordered by deadline; tasks can be cancelled while waiting via the returned Future. Use futurist.GreenDelayedExecutorMixin when working with eventlet- based executors.

Periodics

• A futurist.periodics.PeriodicWorker that can use the previously mentioned executors to run asynchronous work periodically in parallel or synchronously. It does this by executing arbitrary functions/methods that have been decorated with the futurist.periodics.periodic() decorator according to a internally maintained schedule (which itself is based on the heap algorithm).