Coordinator ensures that the given component is not executed concurrently.

Runner runs a workload periodically, or immediately upon receiving a notification.

Drainable is an optional interface which component runners can implement in order to perform something on shutdown.

Runnable represents a workload to execute.

Schedulable represents a workload that is executed normally on a periodic schedule, but can also be run immediately.

RunFunc turns a simple function into a Runnable.