Question: What are the job options in BullMQ and how can they be used?


In BullMQ, a job is a unit of work that can be processed by a worker. When creating a new job in BullMQ, there are several options you can specify to configure its behavior:

  1. delay: This option allows you to delay the execution of the job by a certain amount of milliseconds.

  2. attempts: This option lets you specify the number of attempts to perform if the job fails.

  3. backoff: This option can be used to control the backoff strategies on retries.

  4. lifo: If set to true, the job will be placed last in the queue (last in, first out).

  5. timeout: This represents the max amount of time in milliseconds a job can be active. If exceeded, the job fails.

  6. removeOnComplete: If true, removes the job when successfully completed.

  7. removeOnFail: If true, removes the job when it fails after all attempts.

  8. stackTraceLimit: Limits the amount of stack trace lines stored in case of failure.

Here's an example on how to use these options when adding a job:

const Queue = require('bullmq').Queue; const queue = new Queue('my-queue'); queue.add( 'my-job', { foo: 'bar' }, // Job data { delay: 5000, attempts: 3, backoff: { type: 'exponential', delay: 5000 }, lifo: false, timeout: 20000, removeOnComplete: true, removeOnFail: true, stackTraceLimit: 5 } );

This will add a job named 'my-job' with some data, and configure it with the provided options.

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