PSA/sdk/samples/component/scheduler-demo

Scheduler Demo Extension

This sample extension demonstrates how to use the cap:scheduler.manage capability to programmatically create, update, and delete scheduled tasks for your extension.

Features

• Self-Configuration: The extension sets up its own scheduled tasks when /api/setup is called
• Schedule Management: List, create, and delete schedules through the UI
• Schedulable Endpoints: Demonstrates endpoints marked as schedulable: true in the manifest

Capabilities Used

• cap:scheduler.manage - Manage extension schedules
• cap:log.emit - Write logs
• cap:context.read - Read execution context

Endpoints

Method	Path	Schedulable	Description
GET	/api/status	Yes	Health check endpoint
POST	/api/setup	No	Auto-configure schedules
GET	/api/schedules	No	List all schedules
DELETE	/api/schedules/:id	No	Delete a schedule
POST	/api/heartbeat	Yes	Scheduled heartbeat

How It Works

Self-Configuration Pattern

When the extension's /api/setup endpoint is called, it:

1. Discovers available schedulable endpoints via host.scheduler.getEndpoints()
2. Checks for existing schedules to avoid duplicates
3. Creates new schedules for the heartbeat and status endpoints
4. Returns a summary of what was configured

// Example: Creating a schedule from within the extension
const result = await host.scheduler.create({
  endpoint: 'POST /api/heartbeat',
  cron: '*/5 * * * *', // Every 5 minutes
  timezone: 'UTC',
  enabled: true,
  name: 'Heartbeat Check',
  payload: JSON.stringify({ source: 'auto-setup' }),
});

Manifest Configuration

Endpoints must be marked as schedulable: true in the manifest to be eligible for scheduling:

{
  "api": {
    "endpoints": [
      { "method": "POST", "path": "/api/heartbeat", "handler": "dist/main", "schedulable": true }
    ]
  }
}

Building

npm install
npm run build
npm run pack  # Creates a deployable bundle

Testing

npm test

Usage in Production

1. Install the extension with the cap:scheduler.manage capability enabled
2. Navigate to the extension's UI via the app menu
3. Click "Setup Schedules" to auto-configure the scheduled tasks
4. Use "Refresh List" to view current schedules
5. Delete schedules as needed through the UI

Notes

• Extensions can only manage their own schedules
• Schedules are scoped to the extension installation (tenant + extension)
• The runNow functionality remains admin-only and is not exposed to extensions