@backstage/backend-tasks

Common distributed task management for Backstage backends.

Usage

Add the library to your backend package:

# From your Backstage root directory
yarn --cwd packages/backend add @backstage/backend-tasks

then make use of its facilities as necessary:

import { TaskScheduler } from '@backstage/backend-tasks';

const scheduler = TaskScheduler.fromConfig(rootConfig).forPlugin('my-plugin');

await scheduler.scheduleTask({
  id: 'refresh_things',
  frequency: { cron: '*/5 * * * *' }, // every 5 minutes, also supports Duration
  timeout: { minutes: 15 },
  fn: async () => {
    await entityProvider.run();
  },
});

Local Development

When working with the @backstage/backend-tasks library you may run into your task not running immediately at startup as expected if you are using a persistent database. This is by design - the library respects the previous state and does not run the task sooner than the specified frequency. If you want to get around this, there is a table called backstage_backend_tasks__tasks in the applicable plugin's database which will contain a record with the next run date and time. You can delete this record to get things back to what you expect.

Documentation

• Backstage Readme
• Backstage Documentation