How to reference active delayed_job within the actual job

Question

I am working on a solution to display the percentage completion of a delayed job (using the delayed_job gem). At the present, I have a database migration that looks like the following for my delayed_jobs table:

class CreateDelayedJobs < ActiveRecord::Migration
  def self.up
    create_table :delayed_jobs, :force => true do |table|
      table.integer  :priority, :default => 0      # Allows some jobs to jump to the front of the queue
      table.integer  :attempts, :default => 0      # Provides for retries, but still fail eventually.
      table.text     :handler                      # YAML-encoded string of the object that will do work
      table.text     :last_error                   # reason for last failure (See Note below)
      table.datetime :run_at                       # When to run. Could be Time.zone.now for immediately, or sometime in the future.
      table.datetime :locked_at                    # Set when a client is working on this object
      table.datetime :failed_at                    # Set when all retries have failed (actually, by default, the record is deleted instead)
      table.string   :locked_by                    # Who is working on this object (if locked)
      table.string   :queue                        # The name of the queue this job is in
      table.integer  :progress
      table.timestamps

    end

    add_index :delayed_jobs, [:priority, :run_at], :name => 'delayed_jobs_priority'
  end

  def self.down
    drop_table :delayed_jobs
  end
end

I am using an enqueue process within a controller method for a delayed job, and referencing a class in lib/build_detail.rb :

Delayed::Job.enqueue(BuildDetail.new(@object, @com))

The lib/build_detail.rb file is as follows:

class BuildDetail < Struct.new(:object, :com)

  def perform
    total_count = object.person_ids.length
    progress_count = 0

    people = com.person object.person_ids do |abc|
      progress_count += abc.size
      Delayed::Job.current.update_attribute :progress, (progress_count/total_count)
    end
  end  

end

Delayed::Job.current doesn't work. I see the Delayed::Job.current method proposed on this posting, however it looks like the method was never included in the main delayed_jobs github project.

How can I access the current job (from within the actual job), to update the progress field each time my job goes through the loop?

Answer 1

It's to late to answer but I've faced with the same requirement so may be it will help someone. All you need to do is to implement custom job and before-hook where you will store reference on current job:

class MyTestJob
  def before(job)
    @job = job
  end

  def perform
    ...
    @job.update_attributes({ progress: your_progress_var }, without_protection: true)
  end
end