Class: Pgbus::ActiveJob::Executor

Inherits:
Object
  • Object
show all
Defined in:
lib/pgbus/active_job/executor.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client: Pgbus.client, config: Pgbus.configuration, stat_buffer: nil) ⇒ Executor

Returns a new instance of Executor.



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# File 'lib/pgbus/active_job/executor.rb', line 10

def initialize(client: Pgbus.client, config: Pgbus.configuration, stat_buffer: nil)
  @client = client
  @config = config
  @stat_buffer = stat_buffer
end

Instance Attribute Details

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/pgbus/active_job/executor.rb', line 8

def client
  @client
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/pgbus/active_job/executor.rb', line 8

def config
  @config
end

Instance Method Details

#execute(message, queue_name, source_queue: nil) ⇒ Object 



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# File 'lib/pgbus/active_job/executor.rb', line 20

def execute(message, queue_name, source_queue: nil)
  execution_start = monotonic_now
  tag = "msg_id=#{message.msg_id} queue=#{queue_name} read_ct=#{message.read_ct}"
  Pgbus.logger.debug { "[Pgbus::Executor] start #{tag}" }

  payload = JSON.parse(message.message)
  job_class = payload["job_class"]
  read_count = message.read_ct.to_i

  if read_count > config.max_retries
    handle_dead_letter(message, queue_name, payload, source_queue: source_queue)
    FailedEventRecorder.clear!(queue_name: queue_name, msg_id: message.msg_id.to_i)
    signal_concurrency(payload)
    signal_batch_discarded(payload)
    Uniqueness.release_lock(Uniqueness.extract_key(payload))
    record_stat(payload, queue_name, "dead_lettered", execution_start, message: message)
    Pgbus.logger.debug { "[Pgbus::Executor] dead_lettered #{tag} job_class=#{job_class}" }
    return :dead_lettered
  end
  uniqueness_key = Uniqueness.extract_key(payload)
  uniqueness_strategy = Uniqueness.extract_strategy(payload)

  if uniqueness_key
    case uniqueness_strategy
    when :until_executed
      # No claim step needed — PGMQ's visibility timeout is the execution lock.
      # The uniqueness key row was inserted at enqueue time and will be
      # released on completion or DLQ.
      nil
    when :while_executing
      # Acquire the lock now. If another worker is already executing
      # this job, skip it — VT will expire and it'll be retried.
      unless Uniqueness.acquire_execution_lock(uniqueness_key, payload)
        Pgbus.logger.info { "[Pgbus] Skipping duplicate execution for #{job_class}" }
        return :skipped
      end
    end
  end

  Pgbus.logger.debug { "[Pgbus::Executor] deserialized #{tag} job_class=#{job_class}" }
  job_succeeded = false

  msg_id = message.msg_id.to_i
  Instrumentation.instrument("pgbus.executor.execute", queue: queue_name, job_class: job_class) do
    job = ::ActiveJob::Base.deserialize(payload)
    Pgbus.logger.debug { "[Pgbus::Executor] running #{tag} job_class=#{job_class}" }
    execute_job(job)
    Pgbus.logger.debug { "[Pgbus::Executor] perform_returned #{tag} job_class=#{job_class}" }
    archive_from(queue_name, msg_id, source_queue: source_queue)
    Pgbus.logger.debug { "[Pgbus::Executor] archived #{tag} job_class=#{job_class}" }
    FailedEventRecorder.clear!(queue_name: queue_name, msg_id: msg_id)
    job_succeeded = true
  end

  instrument("pgbus.job_completed", queue: queue_name, job_class: job_class)
  record_stat(payload, queue_name, "success", execution_start, message: message)
  Pgbus.logger.debug { "[Pgbus::Executor] done #{tag} job_class=#{job_class}" }
  :success
rescue *FATAL_EXCEPTIONS
  # Process-fatal: propagate so the supervisor/OS can react.
  raise
rescue Exception => e # rubocop:disable Lint/RescueException
  # Widened from StandardError to catch Async::Stop / Async::Cancel
  # (both inherit from Exception, not StandardError) under execution_mode: :async.
  # Before this, a fiber interruption between perform_now and archive_from
  # silently lost control flow — no failed event row, no job_failed
  # notification, uniqueness lock held until VT expired. See issue #126.
  handle_failure(message, queue_name, e, payload: payload)
  instrument("pgbus.job_failed", queue: queue_name, job_class: payload&.dig("job_class"), error: e.class.name)
  record_stat(payload, queue_name, "failed", execution_start, message: message)
  Pgbus.logger.debug { "[Pgbus::Executor] failed #{tag} job_class=#{payload&.dig("job_class")} error=#{e.class}" }
  # Don't signal concurrency on transient failure — the job will be retried.
  # Semaphore is released only on success or dead-lettering.
  :failed
ensure
  # Signal concurrency and batch only when the job was archived successfully.
  # job_succeeded is set AFTER archive_message, so if archive fails the
  # semaphore slot stays held until VT expires and the job is retried.
  if job_succeeded
    signal_concurrency(payload)
    signal_batch_completed(payload)
    # Release uniqueness lock on successful completion (both strategies)
    Uniqueness.release_lock(uniqueness_key) if uniqueness_key
  end
end