code: def make_reverb_online_queue(
      environment_spec: specs.EnvironmentSpec,
      extra_spec: Dict[str, Any],
      max_queue_size: int,
      sequence_length: int,
      sequence_period: int,
      batch_size: int,
      replay_table_name: str = adders.DEFAULT_PRIORITY_TABLE,
  ) -> ReverbReplay:
      """Creates a single process queue from an environment spec and extra_spec."""
      signature = adders.SequenceAdder.signature(
          environment_spec, extra_spec
      )
      queue = reverb.Table.queue(
          name=replay_table_name,
          max_size=max_queue_size,
          signature=signature,
      )
      server = reverb.Server([queue], port=None)
      can_sample = lambda: queue.can_sample(batch_size)
  
      # Component to add things into replay.
      address = f"localhost:{server.port}"
      adder = adders.SequenceAdder(
          client=reverb.Client(address),
          period=sequence_period,
          sequence_length=sequence_length,
      )
  
      # The dataset object to learn from.
      # We don't use datasets.make_reverb_dataset() here to avoid interleaving
      # and prefetching, that doesn't work well with can_sample() check on update.
      dataset = reverb.TrajectoryDataset.from_table_signature(
          server_address=address,
          table=replay_table_name,
          max_in_flight_samples_per_worker=1,
      )
      dataset = dataset.batch(batch_size, drop_remainder=True)
      data_iterator = dataset.as_numpy_iterator()
      return ReverbReplay(
          server, adder, data_iterator, can_sample=can_sample
      )
  
file_path: acme/acme/agents/replay.py
imports: import dataclasses
  from typing import Any, Callable, Dict, Iterator, Optional
  from acme import adders
  from acme import datasets
  from acme import specs
  from acme import types
  from acme.adders import reverb
  import reverb
label_desc: Use image node_id 2 for calling a global function with example usage: make_reverb_online_queue(environment_spec, extra_spec, max_queue_size, sequence_length, sequence_period, batch_size, replay_table_name) and returns: ReverbReplay