Bull queue integration in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the BullModule in a NestJS module.

NestJS

import { BullModule } from '@nestjs/bull';

@Module({
  imports: [BullModule.[1]({ name: 'email' })],
})
export class AppModule {}

Drag options to blanks, or click blank then click option'

AregisterQueue

Bregister

CforRoot

DforFeature

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'forRoot' instead of 'register' to register a queue.

Confusing 'registerQueue' with the actual method name.

The correct method to register a queue in BullModule is 'register'.

2fill in blank

medium

Complete the code to inject the queue into a service using constructor injection.

NestJS

import { InjectQueue } from '@nestjs/bull';
import { Queue } from 'bull';

@Injectable()
export class EmailService {
  constructor(@[1]('email') private readonly emailQueue: Queue) {}
}

Drag options to blanks, or click blank then click option'

AInjectQueue

BInject

CInjectable

DInjectService

Attempts:

3 left

💡 Hint

Common Mistakes

Using '@Inject' instead of '@InjectQueue' for queue injection.

Forgetting to import 'InjectQueue' from '@nestjs/bull'.

Use @InjectQueue decorator to inject a Bull queue by name.

3fill in blank

hard

Fix the error in the code to add a job to the queue.

NestJS

async sendEmail(data: any) {
  await this.emailQueue.[1](data);
}

Drag options to blanks, or click blank then click option'

AaddJob

Benqueue

Cadd

Dpush

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'addJob' which is not a method in Bull queue.

Using 'enqueue' or 'push' which are not Bull queue methods.

The correct method to add a job to a Bull queue is 'add'.

4fill in blank

hard

Fill both blanks to process jobs in a Bull queue with a processor function.

NestJS

@Processor('[1]')
export class EmailProcessor {
  @Process()
  async handleJob(job: Job) {
    console.log('Processing job:', job.data);
  }
}

Drag options to blanks, or click blank then click option'

Aemail

BsendEmail

CEmailProcessor

DjobProcessor

Attempts:

3 left

💡 Hint

Common Mistakes

Using class name or method name instead of queue name in @Processor.

Omitting the queue name in the @Processor decorator.

The @Processor decorator takes the queue name to process jobs from that queue.

5fill in blank

hard

Fill all three blanks to configure BullModule with Redis connection options.

NestJS

BullModule.forRoot({
  redis: {
    host: '[1]',
    port: [2],
    password: '[3]',
  },
})

Drag options to blanks, or click blank then click option'

Alocalhost

B6379

Csecret123

D127.0.0.1

Attempts:

3 left

💡 Hint

Common Mistakes

Using port as a string instead of a number.

Confusing host with password values.

The Redis host is usually '127.0.0.1', port is 6379, and password can be any string like 'secret123'.