Scheduler Service

When writing plugins, you sometimes want to have things running on a schedule, or something similar to cron jobs that are distributed through instances that your backend plugin is running on. We supply a task scheduler for this purpose that is scoped per plugin so that you can create these tasks and orchestrate their execution.

Using the service

The following example shows how to get the scheduler service in your example backend to issue a scheduled task that runs across your instances at a given interval.

import {
  coreServices,
  createBackendPlugin,
} from '@backstage/backend-plugin-api';
import { fetch } from 'node-fetch';

createBackendPlugin({
  pluginId: 'example',
  register(env) {
    env.registerInit({
      deps: {
        scheduler: coreServices.scheduler,
      },
      async init({ scheduler }) {
        await scheduler.scheduleTask({
          frequency: { minutes: 10 },
          timeout: { seconds: 30 },
          id: 'ping-google',
          fn: async () => {
            await fetch('http://google.com/ping');
          },
        });
      },
    });
  },
});