Scheduler

Plane: Intelligence Plane

Purpose

Resource allocation and time optimization. The Scheduler assigns tasks to resources based on availability, proximity, capability, and policy constraints. It supports multiple scheduling modes to serve different application patterns.

Responsibilities

• Assign tasks from the Planner to specific devices/resources

• Optimize assignments for time, distance, and load balancing

• Support one-time, recurring, and conditional scheduling

• Consult Policy Service for scheduling priorities and constraints

• Query DeviceAdmin for resource availability and capabilities

Scheduling Modes

Mode	Trigger	Use Case	Example App
One-time	Order/event arrives	Single execution	WES (order-driven)
Recurring (cron)	Time schedule	Periodic execution	ClearJanitor (nightly clean)
Conditional	Event condition met	Reactive execution	Future (sensor threshold)

Key Entities

Entity	Description
Assignment	A task bound to a specific resource at a specific time
Schedule	A recurring pattern (cron expression + task template)
ResourceSlot	A time window of resource availability

API Surface

Operation	Description
POST /assignments	Create a one-time task assignment
POST /schedules	Create a recurring schedule
GET /schedules	List schedules
GET /assignments?resource=&status=	Query assignments
DELETE /schedules/{id}	Cancel a recurring schedule

Dependencies

Service	Relationship
Planner	Receives tasks to be assigned
DeviceAdmin	Queries resource capabilities and availability
Marie	Proximity-based resource selection
Policy Service	Scheduling priorities, time-of-day restrictions

Consumed By

Consumer	Usage
Execution Manager	Receives assignments to execute
Applications	Create and manage schedules