I would like to create a scheduled task for my NestJs application. It should execute every X seconds so I use intervals as described here.

The application makes use of configuration files so I could use keep the interval configurable. But how would I pass in a variable to the Typescript decorator?

NestJs is providing a sample repository for scheduled tasks

So based on the sample I would like to have something like

@Injectable()
export class TasksService {
  constructor(
    private readonly myConfigService: MyConfigService,
  ) {}

  @Interval(this.myConfigService.intervalInMilliseconds)
  handleInterval() {
    // ...
  }
}

Do I have to use the SchedulerRegistry as described below in the docs? It seems this is not possible with standard Typescript, see this thread.

I would like to create a scheduled task for my NestJs application. It should execute every X seconds so I use intervals as described here.

The application makes use of configuration files so I could use keep the interval configurable. But how would I pass in a variable to the Typescript decorator?

NestJs is providing a sample repository for scheduled tasks

So based on the sample I would like to have something like

@Injectable()
export class TasksService {
  constructor(
    private readonly myConfigService: MyConfigService,
  ) {}

  @Interval(this.myConfigService.intervalInMilliseconds)
  handleInterval() {
    // ...
  }
}

Do I have to use the SchedulerRegistry as described below in the docs? It seems this is not possible with standard Typescript, see this thread.

• javascript
• node.js
• typescript
• nestjs

Share Improve this question Follow edited Jan 11, 2020 at 20:35 Kim Kern 60.7k2020 gold badges218218 silver badges214214 bronze badges asked Jan 11, 2020 at 20:08 Question3rQuestion3r 3,8722929 gold badges123123 silver badges244244 bronze badges

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1 Answer 1

Sorted by: Reset to default 7

This is not possible with the declarative API (annotations), you have to register the cron job dynamically (see the docs):

@Injectable()
export class TasksService implements OnModuleInit {
  constructor(
    private readonly myConfigService: MyConfigService,
    private readonly schedulerRegistry: SchedulerRegistry,
  ) {}

  onModuleInit() {
    const interval = setInterval(() => this.handleInterval, this.myConfigService.intervalInMs);
    this.schedulerRegistry.addInterval('my-dynamic-interval', interval);
  }

  handleInterval() {
    // ...
  }
}