AutorunCollector launches a process that looks for existing resolutions with state TO_AUTORUN, and passes them to the engine for execution.

GarbageCollector launches a process that cleans up finished tasks (ie are in a final state) older than a given threshold.

GetEngine returns the singleton instance of Engine.

Init launches the task orchestration engine, providing it with a global context and with a store from which to inherit configuration items needed for task execution.

InstanceCollector launches a process that retrieves resolutions which might have been running on a dead instance and marks them as crashed, for examination.

RetryCollector launches a process that collects all resolutions eligible for a new run and passes them to the engine for execution.

Engine is the heart of utask: it is the active process that handles the lifecycle of every task resolution.