Job priorities and queues in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the queue name for a job.

Ruby on Rails

class MyJob < ApplicationJob
  queue_as :[1]

  def perform(*args)
    # job code here
  end
end

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

Adefault

Burgent

Clow_priority

Dmailers

Attempts:

3 left

💡 Hint

Common Mistakes

Using a queue name that is not defined in the system.

Forgetting to set the queue name when needed.

The queue_as method sets the queue name for the job. Here, default is the standard queue name.

2fill in blank

medium

Complete the code to enqueue a job with high priority queue.

Ruby on Rails

MyJob.set(queue: :[1]).perform_later(user_id)

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

Adefault

Burgent

Clow_priority

Dmailers

Attempts:

3 left

💡 Hint

Common Mistakes

Using the default queue when a specific priority is needed.

Misspelling the queue name.

Using set(queue: :urgent) enqueues the job to the 'urgent' queue, which is for high priority jobs.

3fill in blank

hard

Fix the error in the job class to correctly set the queue name.

Ruby on Rails

class ReportJob < ApplicationJob
  queue_as [1]

  def perform(report_id)
    # generate report
  end
end

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

A"reports"

B'reports'

Creports

D:reports

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of symbols for queue names.

Omitting the colon before the queue name.

The queue_as method expects a symbol for the queue name, so :reports is correct.

4fill in blank

hard

Fill both blanks to create a job that retries 5 times and uses the 'critical' queue.

Ruby on Rails

class CriticalJob < ApplicationJob
  queue_as [1]
  retry_on [2], attempts: 5

  def perform(task_id)
    # critical task
  end
end

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

A:critical

BStandardError

CRuntimeError

D:default

Attempts:

3 left

💡 Hint

Common Mistakes

Using string queue names instead of symbols.

Using incorrect error classes for retry.

The job uses the :critical queue and retries on StandardError up to 5 times.

5fill in blank

hard

Fill all three blanks to define a job that uses the 'mailers' queue, discards after 3 attempts, and performs with a user email.

Ruby on Rails

class UserMailerJob < ApplicationJob
  queue_as [1]
  discard_on [2], attempts: 3

  def perform([3])
    # send email
  end
end

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

A:mailers

BStandardError

Cemail

D:default

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of symbols for queue names.

Using wrong error classes for discard.

Incorrect parameter names in perform method.

The job uses the :mailers queue, discards on StandardError after 3 attempts, and takes email as a parameter.