[PR] Refactor the synchronisation primitives

[kopf-archiver]

A pull request by nolar at 2019-11-25 12:29:27+00:00
Original URL: zalando-incubator/kopf#256
Merged by nolar at 2019-12-12 13:31:58+00:00

Issue : #255

Description

The existing coroutines to handle the existing synchronisation primitives (a generalised flag) are moved to the dedicated module, and tests are added (previously it was considered an implementation details and not tested directly).

A new synchronisation primitive is added to simplify the code and reduce the semantical complexity of the logic by removing the technical low-level details from it:

A toggle, which is like an event, but is bi-directional: can be turned on/off, and can be awaited until turned on/off — unlike the events, which can be awaited only until turned on, but not off.

Types of Changes

• Refactoring

Review

List of tasks the reviewer must do to review the PR

• Tests