"""
-Functions for setting up and importing a new Nominatim database.
+Functions for importing tiger data and handling tarbar and directory files
"""
import logging
import os
import tarfile
import selectors
-from ..db.connection import connect
-from ..db.async_connection import DBConnection
-from ..db.sql_preprocessor import SQLPreprocessor
+from nominatim.db.connection import connect
+from nominatim.db.async_connection import DBConnection
+from nominatim.db.sql_preprocessor import SQLPreprocessor
-# pylint: disable=R0912
-# pylint: disable=R0914,R0915,W0702
LOG = logging.getLogger()
-def add_tiger_data(dsn, data_dir, threads, config, sqllib_dir):
- """ Import tiger data from directory or tar file
+def handle_tarfile_or_directory(data_dir):
+ """ Handles tarfile or directory for importing tiger data
"""
- # Handling directory or tarball file.
- is_tarfile = False
+
+ tar = None
if data_dir.endswith('.tar.gz'):
- is_tarfile = True
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
+ return None, None
else:
files = os.listdir(data_dir)
- sql_files = [i for i in files if i.endswith('.sql')]
+ 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
+ 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, sqllib_dir)
+ 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 is_tarfile:
- file_path = os.path.join(data_dir, sql_file)
- file = open(file_path)
+ if not tar:
+ file = open(sql_file)
else:
file = tar.extractfile(sql_file)
- lines = 0
- end_of_file = False
- total_used_threads = place_threads
- while True:
- if end_of_file:
- break
- for imod in range(place_threads):
- conn = DBConnection(dsn)
- conn.connect()
-
- sql_query = file.readline()
- lines += 1
-
- if not sql_query:
- end_of_file = True
- total_used_threads = imod
- break
-
- conn.perform(sql_query)
- sel.register(conn, selectors.EVENT_READ, conn)
-
- if lines == 1000:
- print('. ', end='', flush=True)
- lines = 0
-
- todo = min(place_threads, total_used_threads)
- while todo > 0:
- for key, _ in sel.select(1):
- try:
- conn = key.data
- sel.unregister(conn)
- conn.wait()
- conn.close()
- todo -= 1
- except:
- todo -= 1
-
- if is_tarfile:
+
+ 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, sqllib_dir)
+ sql = SQLPreprocessor(conn, config)
sql.run_sql_file(conn, 'tiger_import_finish.sql')
-
\ No newline at end of file
projects / nominatim.git / blobdiff