def stack(cls,
name: str,
max_size: int,
extensions: Sequence[TableExtensionBase] = (),
signature: Optional[reverb_types.SpecNest] = None):
"""Constructs a Table which acts like a stack.
Args:
name: Name of the priority table (aka stack).
max_size: Maximum number of items in the priority table (aka stack).
extensions: See documentation in the constructor.
signature: See documentation in the constructor.
Returns:
Table which behaves like a stack of size `max_size`.
"""
return cls(
name=name,
sampler=item_selectors.Lifo(),
remover=item_selectors.Lifo(),
max_size=max_size,
max_times_sampled=1,
rate_limiter=rate_limiters.Stack(max_size),
extensions=extensions,
signature=signature)
def stack(cls, name: str, max_size: int):
"""Constructs a Table which acts like a stack.
Args:
name: Name of the priority table (aka stack).
max_size: Maximum number of items in the priority table (aka stack).
Returns:
Table which behaves like a stack of size `max_size`.
"""
return cls(name=name,
sampler=item_selectors.Lifo(),
remover=item_selectors.Lifo(),
max_size=max_size,
max_times_sampled=1,
rate_limiter=rate_limiters.Stack(max_size))
class TableTest(parameterized.TestCase):
def _check_selector_proto(self, expected_selector, proto_msg):
if isinstance(expected_selector, item_selectors.Uniform):
self.assertTrue(proto_msg.HasField('uniform'))
elif isinstance(expected_selector, item_selectors.Prioritized):
self.assertTrue(proto_msg.HasField('prioritized'))
elif isinstance(expected_selector, pybind.HeapSelector):
self.assertTrue(proto_msg.HasField('heap'))
elif isinstance(expected_selector, item_selectors.Fifo):
self.assertTrue(proto_msg.HasField('fifo'))
elif isinstance(expected_selector, item_selectors.Lifo):
self.assertTrue(proto_msg.HasField('lifo'))
else:
raise ValueError(f'Unknown selector: {expected_selector}')
@parameterized.product(
sampler_fn=[
item_selectors.Uniform, lambda: item_selectors.Prioritized(1.),
item_selectors.MinHeap, item_selectors.MaxHeap,
item_selectors.Fifo, item_selectors.Lifo
],
remover_fn=[
item_selectors.Uniform, lambda: item_selectors.Prioritized(1.),
item_selectors.MinHeap, item_selectors.MaxHeap,
item_selectors.Fifo, item_selectors.Lifo
],
rate_limiter_fn=[
lambda: rate_limiters.MinSize(10), lambda: rate_limiters.Queue(10),
lambda: rate_limiters.SampleToInsertRatio(1.0, 10, 1.),
lambda: rate_limiters.Stack(10)
],
)
def test_table_info(self, sampler_fn, remover_fn, rate_limiter_fn):
sampler = sampler_fn()
remover = remover_fn()
rate_limiter = rate_limiter_fn()
table = server.Table(name='table',
sampler=sampler,
remover=remover,
max_size=100,
rate_limiter=rate_limiter)
table_info = table.info
self.assertEqual('table', table_info.name)
self.assertEqual(100, table_info.max_size)
self.assertEqual(0, table_info.current_size)
self.assertEqual(0, table_info.num_episodes)
self.assertEqual(0, table_info.num_deleted_episodes)
self.assertIsNone(table_info.signature)
self._check_selector_proto(sampler, table_info.sampler_options)
self._check_selector_proto(remover, table_info.remover_options)
@parameterized.named_parameters(
(
'scalar',
tf.TensorSpec([], tf.float32),
),
(
'image',
tf.TensorSpec([3, 64, 64], tf.uint8),
),
('nested', (tf.TensorSpec([], tf.int32), {
'a': tf.TensorSpec((1, 1), tf.float64)
})),
)
def test_table_info_signature(self, signature):
table = server.Table(name='table',
sampler=item_selectors.Fifo(),
remover=item_selectors.Fifo(),
max_size=100,
rate_limiter=rate_limiters.MinSize(10),
signature=signature)
self.assertEqual(signature, table.info.signature)
def test_replace(self):
table = server.Table(name='table',
sampler=item_selectors.Fifo(),
remover=item_selectors.Fifo(),
max_size=100,
rate_limiter=rate_limiters.MinSize(10))
rl_info = table.info.rate_limiter_info
new_rate_limiter = rate_limiters.RateLimiter(
samples_per_insert=rl_info.samples_per_insert,
min_size_to_sample=1,
min_diff=rl_info.min_diff,
max_diff=rl_info.max_diff)
new_table = table.replace(rate_limiter=new_rate_limiter)
self.assertEqual(new_table.name, table.name)
self.assertEqual(new_table.info.rate_limiter_info.min_size_to_sample,
1)