mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-10-27 19:48:44 +03:00
121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
"""
|
|
Functions for importing tiger data and handling tarbar and directory files
|
|
"""
|
|
import logging
|
|
import os
|
|
import tarfile
|
|
import selectors
|
|
|
|
from nominatim.db.connection import connect
|
|
from nominatim.db.async_connection import DBConnection
|
|
from nominatim.db.sql_preprocessor import SQLPreprocessor
|
|
|
|
|
|
LOG = logging.getLogger()
|
|
|
|
|
|
def handle_tarfile_or_directory(data_dir):
|
|
""" Handles tarfile or directory for importing tiger data
|
|
"""
|
|
|
|
tar = None
|
|
if data_dir.endswith('.tar.gz'):
|
|
tar = tarfile.open(data_dir)
|
|
sql_files = [i for i in tar.getmembers() if i.name.endswith('.sql')]
|
|
LOG.warning("Found %d SQL files in tarfile with path %s", len(sql_files), data_dir)
|
|
if not sql_files:
|
|
LOG.warning("Tiger data import selected but no files in tarfile's path %s", data_dir)
|
|
return None, None
|
|
else:
|
|
files = os.listdir(data_dir)
|
|
sql_files = [os.path.join(data_dir, i) for i in files if i.endswith('.sql')]
|
|
LOG.warning("Found %d SQL files in path %s", len(sql_files), data_dir)
|
|
if not sql_files:
|
|
LOG.warning("Tiger data import selected but no files found in path %s", data_dir)
|
|
return None, None
|
|
|
|
return sql_files, tar
|
|
|
|
|
|
def handle_threaded_sql_statements(sel, file):
|
|
""" Handles sql statement with multiplexing
|
|
"""
|
|
|
|
lines = 0
|
|
end_of_file = False
|
|
# Using pool of database connections to execute sql statements
|
|
while not end_of_file:
|
|
for key, _ in sel.select(1):
|
|
conn = key.data
|
|
try:
|
|
if conn.is_done():
|
|
sql_query = file.readline()
|
|
lines += 1
|
|
if not sql_query:
|
|
end_of_file = True
|
|
break
|
|
conn.perform(sql_query)
|
|
if lines == 1000:
|
|
print('. ', end='', flush=True)
|
|
lines = 0
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
LOG.info('Wrong SQL statement: %s', exc)
|
|
|
|
def handle_unregister_connection_pool(sel, place_threads):
|
|
""" Handles unregistering pool of connections
|
|
"""
|
|
|
|
while place_threads > 0:
|
|
for key, _ in sel.select(1):
|
|
conn = key.data
|
|
sel.unregister(conn)
|
|
try:
|
|
conn.wait()
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
LOG.info('Wrong SQL statement: %s', exc)
|
|
conn.close()
|
|
place_threads -= 1
|
|
|
|
def add_tiger_data(data_dir, config, threads):
|
|
""" Import tiger data from directory or tar file `data dir`.
|
|
"""
|
|
dsn = config.get_libpq_dsn()
|
|
sql_files, tar = handle_tarfile_or_directory(data_dir)
|
|
|
|
if not sql_files:
|
|
return
|
|
|
|
with connect(dsn) as conn:
|
|
sql = SQLPreprocessor(conn, config)
|
|
sql.run_sql_file(conn, 'tiger_import_start.sql')
|
|
|
|
# Reading sql_files and then for each file line handling
|
|
# sql_query in <threads - 1> chunks.
|
|
sel = selectors.DefaultSelector()
|
|
place_threads = max(1, threads - 1)
|
|
|
|
# Creates a pool of database connections
|
|
for _ in range(place_threads):
|
|
conn = DBConnection(dsn)
|
|
conn.connect()
|
|
sel.register(conn, selectors.EVENT_WRITE, conn)
|
|
|
|
for sql_file in sql_files:
|
|
if not tar:
|
|
file = open(sql_file)
|
|
else:
|
|
file = tar.extractfile(sql_file)
|
|
|
|
handle_threaded_sql_statements(sel, file)
|
|
|
|
# Unregistering pool of database connections
|
|
handle_unregister_connection_pool(sel, place_threads)
|
|
|
|
if tar:
|
|
tar.close()
|
|
print('\n')
|
|
LOG.warning("Creating indexes on Tiger data")
|
|
with connect(dsn) as conn:
|
|
sql = SQLPreprocessor(conn, config)
|
|
sql.run_sql_file(conn, 'tiger_import_finish.sql')
|