def test_unique_put(self):
# Ensure empty starting DB
result = Unique().query().fetch(limit=None)
self.assertFalse(result)
# Test basic functionality with blocking DB calls
kind1 = "foo"
str1 = "bar"
kind2 = "baz"
str2 = "qux"
result = Unique.get_next(kind1, str1)
self.assertEqual(str1 + "1", result)
result = Unique.get_next(kind1, str1)
self.assertEqual(str1 + "2", result)
result = Unique.get_next(kind1, str2)
self.assertEqual(str2 + "1", result)
result = Unique.get_next(kind2, str1)
self.assertEqual(str1 + "1", result)
# Test raw entity manipulation (no shard)
ent = Unique.get_raw_entity(kind1, str1)
ent_moot = ent.get_and_increment()
self.assertEqual(3, ent_moot)
ent_moot = ent.get_and_increment()
self.assertEqual(4, ent_moot)
# ...and again, with manual sharding.
shard = UniqueShard.get_or_create(kind1, str1)
ent = Unique.get_raw_entity(kind1, str1, shard=shard)
ent_moot = ent.get_and_increment()
self.assertEqual(5, ent_moot)
ent_moot = ent.get_and_increment()
self.assertEqual(6, ent_moot)
def accept_multi(self, students): #pylint: disable=too-many-locals, too-many-branches, too-many-statements
"""
This is about ten thousand kinds of overkill for a typical weekly run,
but we're hitting a bottleneck during the initial indexing process.
Shifting control from the model to here and making everything async
increases the complexity, but the performance gains make it
an acceptable tradeoff.
"""
# First off, can we ignore any of the students that were provided?
# An existing attr means that data was already found in the student cache.
temp_students = []
for student in students:
if not getattr(student, self.student_label()):
temp_students.append(student)
shard_cache = {}
entity_cache = {}
new_shard_futures = {}
new_entity_futures = {}
# All of these arrays are aligned, safe to access by position while
# looping through students.
raw_strings = []
shard_ids = []
shard_futures = []
shards = []
entity_futures = []
entities = []
# Async pull any shards that already exist
for student in temp_students:
raw_str = self.generate(student)
raw_strings.append(raw_str)
shard_id = UniqueShard.get_id(self.kind, raw_str)
shard_ids.append(shard_id)
if shard_id not in shard_cache:
shard_cache[shard_id] = UniqueShard.get_by_id_async(shard_id)
shard_futures.append(shard_cache[shard_id])
shard_cache = {}
# Cash in all shard futures
# Async put any shards that weren't found
i = 0
for student in temp_students:
shards.append(shard_futures[i].get_result())
if not shards[i]:
new_shard_futures[i] = UniqueShard(id=shard_ids[i]).put_async()
i += 1
shard_ids = []
# Cash in all futures for newly created shards
# This probably looks a little weird -- get_async futures return an entity, but
# put_async futures return a key instead. We have to fiddle a bit so that
# everything will be symmetrical when we loop through again.
for i in new_shard_futures:
new_shard_futures[i] = new_shard_futures[i].get_result().get_async()
for i in new_shard_futures:
shards[i] = new_shard_futures[i].get_result()
new_shard_futures = {}
# Async pull any entities that exist
i = 0
for student in temp_students:
if raw_strings[i] not in entity_cache:
entity_cache[raw_strings[i]] = Unique.get_by_id_async(
raw_strings[i], parent=shards[i].key)
entity_futures.append(entity_cache[raw_strings[i]])
i += 1
shard_futures = []
entity_cache = {}
# Cash in all entity futures
# Async put any entities that weren't found
i = 0
for student in temp_students:
entities.append(entity_futures[i].get_result())
if not entities[i]:
new_entity_futures[i] = Unique(parent=shards[i].key, id=raw_strings[i]).put_async()
i += 1
shards = []
# Cash in all futures for newly created entities
for i in new_entity_futures:
new_entity_futures[i] = new_entity_futures[i].get_result().get_async()
for i in new_entity_futures:
entities[i] = new_entity_futures[i].get_result()
new_entity_futures = {}
# Populate student objects
i = 0
for student in temp_students:
new_str = ""
unique_num = str(entities[i].get_and_increment(commit=False))
if unique_num == "1" and self.suppress_first:
new_str = raw_strings[i]
else:
new_str = raw_strings[i] + unique_num
setattr(student, self.student_label(), new_str)
student.cache_is_dirty = True
i += 1
entity_futures = []
raw_strings = []
# Async put all entities via our exporter object
for entity in entities:
self.exporter.append(entity)
