Class: MaquinaNewsletters::SendBatchJob

Inherits:
ApplicationJob
  • Object
show all
Defined in:
app/jobs/maquina_newsletters/send_batch_job.rb

Overview

Delivers one batch of a newsletter, then enqueues the next batch (a day later) or marks the newsletter sent. A single code path covers both “all-at-once” (batch_size == 0 → one batch with every recipient) and multi-batch sends (Sidecar A4 — Pattern A is cancelled, no companion job).

State ownership (Sidecar A1–A4, C3):

- batch 0 owns the scheduled → sending transition and recipients_count.
- each send is isolated so one bad address can't re-spam the batch on retry.
- a wholly-unrecoverable run marks the newsletter failed and re-raises.

Instance Method Summary collapse

Instance Method Details

#perform(newsletter_id, batch_index) ⇒ Object 



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# File 'app/jobs/maquina_newsletters/send_batch_job.rb', line 14

def perform(newsletter_id, batch_index)
  newsletter = Newsletter.find(newsletter_id)

  # Idempotent guard: a terminal newsletter is never re-sent (protects
  # against double-trigger, e.g. schedule + send-now firing together).
  return if newsletter.sent? || newsletter.failed?

  recipients = newsletter.resolved_recipients

  if batch_index.zero?
    newsletter.start_sending! if newsletter.scheduled? # A1
    newsletter.update!(recipients_count: recipients.size) # A3
  end

  batch = newsletter.recipient_batch(recipients, batch_index) # A4

  failures = deliver_batch(newsletter, batch) # C3

  # A2: an entire non-empty batch that wholly failed is unrecoverable.
  if batch.any? && failures == batch.size
    raise "MaquinaNewsletters::SendBatchJob: every delivery in batch " \
          "#{batch_index} of newsletter #{newsletter_id} failed"
  end

  if newsletter.recipient_batch(recipients, batch_index + 1).any?
    self.class.set(wait: 1.day).perform_later(newsletter_id, batch_index + 1)
  else
    newsletter.mark_sent!
  end
rescue => e # A2
  newsletter&.mark_failed!
  raise e
end