NestJs

Source URL: https://docs.bullmq.io/guide/nestjs

NestJs

There is a compatible module to be used in NestJs.

npm i @nestjs/bullmq

Once the installation process is complete, we can import the BullModule into the root AppModule.

import { Module } from '@nestjs/common';
import { BullModule } from '@nestjs/bullmq';

@Module({
  imports: [
    BullModule.forRoot({
      connection: {
        host: 'localhost',
        port: 6379,
      },
    }),
  ],
})
export class AppModule {}

To register a queue, import the BullModule.registerQueue() dynamic module, as follows:

BullModule.registerQueue({
  name: 'queueName',
});

To register a flow producer, import the BullModule.registerFlowProducer() dynamic module, as follows:

BullModule.registerFlowProducer({
  name: 'flowProducerName',
});

Processor

To register a processor, you may need to use the Processor decorator:

import { Processor, WorkerHost, OnWorkerEvent } from '@nestjs/bullmq';
import { Job } from 'bullmq';

@Processor('queueName')
class TestProcessor extends WorkerHost {
  async process(job: Job<any, any, string>): Promise<any> {
    // do some stuff
  }

  @OnWorkerEvent('completed')
  onCompleted() {
    // do some stuff
  }
}

And then register it as a provider:

@Module({
  imports: [
    BullModule.registerQueue({
      name: 'queueName',
      connection: {
        host: '0.0.0.0',
        port: 6380,
      },
    }),
    BullModule.registerFlowProducer({
      name: 'flowProducerName',
      connection: {
        host: '0.0.0.0',
        port: 6380,
      },
    }),
  ],
  providers: [TestProcessor],
})
export class AppModule {}

Read more:

• 💡 Queues Technique