def handle(file_path: str, mappings: dict, entity_type, link_type):
"""Generic .nt file dump handler for the dump import into the DB.
Assumptions: each entity must be represented in a compact block of ''adjacent'' lines
"""
db_manager = DBManager(
get_path('soweego.importer.resources', 'db_credentials.json'))
db_manager.drop(link_type)
db_manager.drop(entity_type)
session = db_manager.new_session()
if not os.path.isfile(file_path):
LOGGER.warning("file: %s not found", file_path)
with open(file_path) as file:
current_key = None
current_entity = entity_type()
for row in file.readlines():
try:
# split triples
row_chunks = []
split_regex = r'(?<=["\<])[^<>"]*(?=["\>])'
for match in re.finditer(split_regex, row, re.I):
row_chunks.append(match.group(0))
if len(row_chunks) != 3:
raise Exception(loc.MALFORMED_ROW)
if row_chunks[1] in mappings:
current_field = mappings[row_chunks[1]]
else:
raise Exception(loc.FIELD_NOT_MAPPED % row_chunks[1])
if current_field == 'url':
link = link_type()
link.url = row_chunks[2]
link.tokens = row_chunks[2].replace("/", " ") # TODO
link.catalog_id = current_entity.catalog_id
session.add(link)
if current_key is not None and current_key != row_chunks[0]:
session.add(current_entity)
current_entity = entity_type()
current_key = row_chunks[0]
current_value = row_chunks[2]
setattr(current_entity, current_field, current_value)
except Exception as e:
LOGGER.warning('Error at row %s \n %s', row, str(e))
session.add(current_entity)
try:
db_manager.create(entity_type)
db_manager.create(link_type)
session.commit()
except Exception as e:
LOGGER.warning(loc.WRONG_MAPPINGS, str(e))
def extract_and_populate(self, dump_file_path):
dump_path = os.path.join(os.path.dirname(
os.path.abspath(dump_file_path)), "%s_%s" % (os.path.basename(dump_file_path), 'extracted'))
if not os.path.isdir(dump_path):
with tarfile.open(dump_file_path, "r:bz2") as tar:
tar.extractall(dump_path)
tables = [MusicbrainzArtistEntity,
MusicbrainzBandEntity]
db_manager = DBManager()
db_manager.drop(tables)
db_manager.create(tables)
artist_count = 0
for artist in self._artist_generator(dump_path):
artist_count = artist_count + 1
session = db_manager.new_session()
session.add(artist)
session.commit()
LOGGER.debug("Added %s artist records" % artist_count)
db_manager.drop([MusicbrainzArtistLinkEntity,
MusicbrainzBandLinkEntity])
db_manager.create([MusicbrainzArtistLinkEntity,
MusicbrainzBandLinkEntity])
link_count = 0
for link in self._link_generator(dump_path):
link_count = link_count + 1
session = db_manager.new_session()
session.add(link)
session.commit()
LOGGER.debug("Added %s link records" % link_count)
isni_link_count = 0
for link in self._isni_link_generator(dump_path):
isni_link_count = isni_link_count + 1
session = db_manager.new_session()
session.add(link)
session.commit()
LOGGER.debug("Added %s ISNI link records" % isni_link_count)
db_manager.drop([MusicBrainzArtistBandRelationship])
db_manager.create([MusicBrainzArtistBandRelationship])
relationships_count = 0
relationships_total = 0
for relationship in self._artist_band_relationship_generator(dump_path):
try:
relationships_total = relationships_total + 1
session = db_manager.new_session()
session.add(relationship)
session.commit()
relationships_count = relationships_count + 1
except IntegrityError as i:
LOGGER.warning(str(i))
LOGGER.debug("Added %s/%s relationships records" %
(relationships_count, relationships_total))
def _process_masters_dump(self, dump_file_path):
LOGGER.info("Starting import of masters from Discogs dump '%s'",
dump_file_path)
start = datetime.now()
tables = [DiscogsMasterEntity, DiscogsMasterArtistRelationship]
db_manager = DBManager()
LOGGER.info('Connected to database: %s', db_manager.get_engine().url)
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
'SQL tables dropped and re-created: %s',
[table.__tablename__ for table in tables],
)
extracted_path = '.'.join(dump_file_path.split('.')[:-1])
# Extract dump file if it has not yet been extracted
if not os.path.exists(extracted_path):
LOGGER.info('Extracting dump file')
with gzip.open(dump_file_path, 'rb') as f_in:
with open(extracted_path, 'wb') as f_out:
shutil.copyfileobj(f_in, f_out)
# count number of entries
n_rows = sum(
1 for _ in self._g_process_et_items(extracted_path, 'master'))
session = db_manager.new_session()
entity_array = [] # array to which we'll add the entities
relationships_set = set()
self.total_entities = 0
for _, node in tqdm(self._g_process_et_items(extracted_path, 'master'),
total=n_rows):
if not node.tag == 'master':
continue
self.total_entities += 1
entity = self._extract_from_master_node(node, relationships_set)
entity_array.append(entity)
# commit in batches of `self._sqlalchemy_commit_every`
if len(entity_array) >= self._sqlalchemy_commit_every:
LOGGER.info('Adding batch of entities to the database, '
'this will take a while.'
'Progress will resume soon.')
insert_start_time = datetime.now()
session.bulk_save_objects(entity_array)
session.commit()
session.expunge_all() # clear session
entity_array.clear() # clear entity array
LOGGER.debug(
'It took %s to add %s entities to the database',
datetime.now() - insert_start_time,
self._sqlalchemy_commit_every,
)
# finally commit remaining entities in session
# (if any), and close session
session.bulk_save_objects(entity_array)
session.bulk_save_objects([
DiscogsMasterArtistRelationship(id1, id2)
for id1, id2 in relationships_set
])
session.commit()
session.close()
end = datetime.now()
LOGGER.info(
'Import completed in %s. Total entities: %d. '
'Total relationships %s.',
end - start,
self.total_entities,
len(relationships_set),
)
# once the import process is complete,
# we can safely delete the extracted discogs dump
os.remove(extracted_path)
def _process_artists_dump(self, dump_file_path, resolve):
LOGGER.info(
"Starting import of musicians and bands from Discogs dump '%s'",
dump_file_path,
)
start = datetime.now()
tables = [
DiscogsMusicianEntity,
DiscogsMusicianNlpEntity,
DiscogsMusicianLinkEntity,
DiscogsGroupEntity,
DiscogsGroupNlpEntity,
DiscogsGroupLinkEntity,
]
db_manager = DBManager()
LOGGER.info('Connected to database: %s', db_manager.get_engine().url)
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
'SQL tables dropped and re-created: %s',
[table.__tablename__ for table in tables],
)
extracted_path = '.'.join(dump_file_path.split('.')[:-1])
# Extract dump file if it has not yet been extracted
if not os.path.exists(extracted_path):
LOGGER.info('Extracting dump file')
with gzip.open(dump_file_path, 'rb') as f_in:
with open(extracted_path, 'wb') as f_out:
shutil.copyfileobj(f_in, f_out)
# count number of entries
n_rows = sum(
1 for _ in self._g_process_et_items(extracted_path, 'artist'))
session = db_manager.new_session()
entity_array = [] # array to which we'll add the entities
for _, node in tqdm(self._g_process_et_items(extracted_path, 'artist'),
total=n_rows):
if not node.tag == 'artist':
continue
infos = self._extract_from_artist_node(node, resolve)
if infos is None:
continue
if 'groups' in infos:
entity = DiscogsMusicianEntity()
self._populate_musician(entity_array, entity, infos)
# Band
elif 'members' in infos:
entity = DiscogsGroupEntity()
self._populate_band(entity_array, entity, infos)
# commit in batches of `self._sqlalchemy_commit_every`
if len(entity_array) >= self._sqlalchemy_commit_every:
LOGGER.info('Adding batch of entities to the database, '
'this will take a while. '
'Progress will resume soon.')
insert_start_time = datetime.now()
session.bulk_save_objects(entity_array)
session.commit()
session.expunge_all() # clear session
entity_array.clear() # clear entity array
LOGGER.debug(
'It took %s to add %s entities to the database',
datetime.now() - insert_start_time,
self._sqlalchemy_commit_every,
)
# finally commit remaining entities in session
# (if any), and close session
session.bulk_save_objects(entity_array)
session.commit()
session.close()
end = datetime.now()
LOGGER.info(
'Import completed in %s. '
'Total entities: %d - %d musicians with %d links - %d bands'
' with %d links - %d discarded dead links.',
end - start,
self.total_entities,
self.musicians,
self.musician_links,
self.bands,
self.band_links,
self.dead_links,
)
# once the import process is complete,
# we can safely delete the extracted discogs dump
os.remove(extracted_path)
def extract_and_populate(self, dump_file_paths: Iterable[str],
resolve: bool):
dump_file_path = dump_file_paths[0]
dump_path = os.path.join(
os.path.dirname(os.path.abspath(dump_file_path)),
f"{os.path.basename(dump_file_path)}_extracted",
)
if not os.path.isdir(dump_path):
with tarfile.open(dump_file_path, "r:bz2") as tar:
LOGGER.info("Extracting dump %s in %s", dump_file_path,
dump_path)
tar.extractall(dump_path)
LOGGER.info("Extracted dump %s in %s", dump_file_path,
dump_path)
db_manager = DBManager()
tables = [MusicbrainzReleaseGroupEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing release groups")
release_groups_count = self._add_entities_from_generator(
db_manager, self._release_group_generator, dump_path)
LOGGER.debug("Added %s/%s release group records",
*release_groups_count)
def release_artist_relationships_uniqueness_filter():
"""Remove duplicates from
_release_group_artist_relationship_generator """
yield from [
MusicBrainzReleaseGroupArtistRelationship(item[0], item[1])
for item in set(
self._release_group_artist_relationship_generator(
dump_path))
]
tables = [MusicBrainzReleaseGroupArtistRelationship]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing relationships release-artist/band")
relationships_count = self._add_entities_from_generator(
db_manager, release_artist_relationships_uniqueness_filter)
LOGGER.debug("Added %s/%s relationships records", *relationships_count)
tables = [MusicbrainzReleaseGroupLinkEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing release groups links")
link_count = self._add_entities_from_generator(
db_manager, self._release_group_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s release group link records", *link_count)
tables = [MusicbrainzArtistEntity, MusicbrainzBandEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing artists and bands")
artist_count = self._add_entities_from_generator(
db_manager, self._artist_generator, dump_path)
LOGGER.debug("Added %s/%s artist records", *artist_count)
tables = [MusicbrainzArtistLinkEntity, MusicbrainzBandLinkEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing links")
link_count = self._add_entities_from_generator(
db_manager, self._artist_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s link records", *link_count)
LOGGER.info("Importing ISNIs")
isni_link_count = self._add_entities_from_generator(
db_manager, self._isni_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s ISNI link records", *isni_link_count)
tables = [MusicBrainzArtistBandRelationship]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing relationships artist-band")
def artist_band_relationships_uniqueness_filter():
yield from [
MusicBrainzArtistBandRelationship(item[0], item[1])
for item in set(
self._artist_band_relationship_generator(dump_path))
]
relationships_count = self._add_entities_from_generator(
db_manager, artist_band_relationships_uniqueness_filter)
LOGGER.debug("Added %s/%s relationships records", *relationships_count)
shutil.rmtree(dump_path, ignore_errors=True)
def extract_and_populate(self, dump_file_paths: List[str],
resolve: bool) -> None:
"""
Extracts the data in the dumps (person and movie) and processes them.
It then proceeds to add the appropriate data to the database.
See
:ref:`soweego.importer.models.imdb_entity` module to see the SQLAlchemy
definition of the entities we use to save IMDB data.
:param dump_file_paths: the absolute paths of the already downloaded
dump files.
"""
# the order of these files is specified in `self.get_dump_download_urls`
person_file_path = dump_file_paths[0]
movies_file_path = dump_file_paths[1]
LOGGER.debug('Path to movie info dump: %s', movies_file_path)
LOGGER.debug('Path to person info dump: %s', person_file_path)
start = datetime.datetime.now()
tables = [
imdb_entity.ImdbActorEntity,
imdb_entity.ImdbDirectorEntity,
imdb_entity.ImdbMovieEntity,
imdb_entity.ImdbMusicianEntity,
imdb_entity.ImdbProducerEntity,
imdb_entity.ImdbWriterEntity,
imdb_entity.ImdbMoviePersonRelationship,
]
db_manager = DBManager()
LOGGER.info('Connected to database: %s', db_manager.get_engine().url)
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
'SQL tables dropped and re-created: %s',
[table.__tablename__ for table in tables],
)
LOGGER.info('Starting import of movies ...')
# Here we open the movie dump file, and add everything to the DB
for movie_info, entity_array in self._loop_through_entities(
movies_file_path):
# create the movie SQLAlchemy entity and populate it
movie_entity = imdb_entity.ImdbMovieEntity()
movie_entity.catalog_id = movie_info.get('tconst')
movie_entity.title_type = movie_info.get('titleType')
if movie_info.get('primaryTitle') is not None:
movie_entity.name = movie_info.get('primaryTitle')
movie_entity.name_tokens = ' '.join(
text_utils.tokenize(movie_info.get('primaryTitle')))
movie_entity.is_adult = (True if movie_info.get('isAdult') == '1'
else False)
try:
movie_entity.born = datetime.date(year=int(
movie_info.get('startYear')),
month=1,
day=1)
movie_entity.born_precision = 9
except (KeyError, TypeError):
LOGGER.debug('No start year value for %s', movie_entity)
try:
movie_entity.died = datetime.date(year=int(
movie_info.get('endYear')),
month=1,
day=1)
movie_entity.died_precision = 9
except (KeyError, TypeError):
LOGGER.debug('No end year value for %s', movie_entity)
movie_entity.runtime_minutes = movie_info.get('runtimeMinutes')
if movie_info.get('genres'): # if movie has a genre specified
movie_entity.genres = ' '.join(
text_utils.tokenize(movie_info.get('genres')))
# Creates entity for alias
alias = movie_info.get('originalTitle')
if alias is not None and movie_entity.name != alias:
alias_entity = copy.deepcopy(movie_entity)
alias_entity.name = alias
alias_entity.name_tokens = ' '.join(text_utils.tokenize(alias))
entity_array.append(alias_entity)
entity_array.append(movie_entity)
self.n_movies += 1
# mark end for movie import process
end = datetime.datetime.now()
LOGGER.info(
'Movie import completed in %s. '
'Total movies imported: %d',
end - start,
self.n_movies,
)
LOGGER.info('Starting import of people ...')
# reset timer for persons import
start = datetime.datetime.now()
for person_info, entity_array in self._loop_through_entities(
person_file_path):
# IMDb saves the list of professions as a comma separated
# string
professions = person_info.get('primaryProfession')
# if person has no professions then ignore it
if not professions:
LOGGER.debug('Person %s has no professions',
person_info.get('nconst'))
continue
professions = professions.split(',')
# each person can be added to multiple tables in the DB,
# each table stands for one of the main professions
types_of_entities = []
if 'actor' in professions or 'actress' in professions:
self.n_actors += 1
types_of_entities.append(imdb_entity.ImdbActorEntity())
if 'director' in professions:
self.n_directors += 1
types_of_entities.append(imdb_entity.ImdbDirectorEntity())
if 'producer' in professions:
self.n_producers += 1
types_of_entities.append(imdb_entity.ImdbProducerEntity())
if any(prof in [
'sound_department',
'composer',
'music_department',
'soundtrack',
] for prof in professions):
self.n_musicians += 1
types_of_entities.append(imdb_entity.ImdbMusicianEntity())
if 'writer' in professions:
self.n_writers += 1
types_of_entities.append(imdb_entity.ImdbWriterEntity())
# if the only profession a person has is `miscellaneous` then we
# add it to all tables
if professions == ['miscellaneous']:
self.n_misc += 1
types_of_entities = [
imdb_entity.ImdbActorEntity(),
imdb_entity.ImdbDirectorEntity(),
imdb_entity.ImdbMusicianEntity(),
imdb_entity.ImdbProducerEntity(),
imdb_entity.ImdbWriterEntity(),
]
# add person to every matching table
for etype in types_of_entities:
self._populate_person(etype, person_info, entity_array)
# if person is known for any movies then add these to the
# database as well
if person_info.get('knownForTitles'):
self.n_person_movie_links += 1
self._populate_person_movie_relations(person_info,
entity_array)
self.n_persons += 1
# mark the end time for the person import process
end = datetime.datetime.now()
LOGGER.info(
'Person import completed in %s. '
'Total people imported: %d - '
'Actors: %d - Directors: %d - Musicians: %d - '
'Producers: %d - Writers: %d - Misc: %d',
end - start,
self.n_persons,
self.n_actors,
self.n_directors,
self.n_musicians,
self.n_producers,
self.n_writers,
self.n_misc,
)
def extract_and_populate(self, dump_file_paths: List[str], resolve: bool):
"""Extract relevant data from the *artist* (people) and *release group*
(works) MusicBrainz dumps, preprocess them, populate
`SQLAlchemy <https://www.sqlalchemy.org/>`_ ORM entities, and persist
them to a database instance.
See :mod:`~soweego.importer.models.musicbrainz_entity`
for the ORM definitions.
:param dump_file_paths: paths to downloaded catalog dumps
:param resolve: whether to resolve URLs found in catalog dumps or not
"""
dump_file_path = dump_file_paths[0]
dump_path = os.path.join(
os.path.dirname(os.path.abspath(dump_file_path)),
f"{os.path.basename(dump_file_path)}_extracted",
)
if not os.path.isdir(dump_path):
with tarfile.open(dump_file_path, "r:bz2") as tar:
LOGGER.info("Extracting dump %s in %s", dump_file_path,
dump_path)
tar.extractall(dump_path)
LOGGER.info("Extracted dump %s in %s", dump_file_path,
dump_path)
db_manager = DBManager()
tables = [MusicBrainzReleaseGroupEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing release groups")
release_groups_count = self._add_entities_from_generator(
db_manager, self._release_group_generator, dump_path)
LOGGER.debug("Added %s/%s release group records",
*release_groups_count)
def release_artist_relationships_uniqueness_filter():
"""Remove duplicates from
_release_group_artist_relationship_generator """
yield from [
MusicBrainzReleaseGroupArtistRelationship(item[0], item[1])
for item in set(
self._release_group_artist_relationship_generator(
dump_path))
]
tables = [MusicBrainzReleaseGroupArtistRelationship]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing relationships release-artist/band")
relationships_count = self._add_entities_from_generator(
db_manager, release_artist_relationships_uniqueness_filter)
LOGGER.debug("Added %s/%s relationships records", *relationships_count)
tables = [MusicBrainzReleaseGroupLinkEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing release groups links")
link_count = self._add_entities_from_generator(
db_manager, self._release_group_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s release group link records", *link_count)
tables = [MusicBrainzArtistEntity, MusicBrainzBandEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing artists and bands")
artist_count = self._add_entities_from_generator(
db_manager, self._artist_generator, dump_path)
LOGGER.debug("Added %s/%s artist records", *artist_count)
tables = [MusicBrainzArtistLinkEntity, MusicBrainzBandLinkEntity]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing links")
link_count = self._add_entities_from_generator(
db_manager, self._artist_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s link records", *link_count)
LOGGER.info("Importing ISNIs")
isni_link_count = self._add_entities_from_generator(
db_manager, self._isni_link_generator, dump_path, resolve)
LOGGER.debug("Added %s/%s ISNI link records", *isni_link_count)
tables = [MusicBrainzArtistBandRelationship]
db_manager.drop(tables)
db_manager.create(tables)
LOGGER.info(
"Dropped and created tables %s",
[table.__tablename__ for table in tables],
)
LOGGER.info("Importing relationships artist-band")
def artist_band_relationships_uniqueness_filter():
yield from [
MusicBrainzArtistBandRelationship(item[0], item[1])
for item in set(
self._artist_band_relationship_generator(dump_path))
]
relationships_count = self._add_entities_from_generator(
db_manager, artist_band_relationships_uniqueness_filter)
LOGGER.debug("Added %s/%s relationships records", *relationships_count)
shutil.rmtree(dump_path, ignore_errors=True)