mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-11-30 12:22:10 +03:00
90 lines
3.2 KiB
Python
90 lines
3.2 KiB
Python
"""
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Access and helper functions for the status and status log table.
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"""
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import datetime as dt
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import logging
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import re
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from nominatim.tools.exec_utils import get_url
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from nominatim.errors import UsageError
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LOG = logging.getLogger()
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ISODATE_FORMAT = '%Y-%m-%dT%H:%M:%S'
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def compute_database_date(conn):
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""" Determine the date of the database from the newest object in the
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data base.
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"""
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# First, find the node with the highest ID in the database
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with conn.cursor() as cur:
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osmid = cur.scalar("SELECT max(osm_id) FROM place WHERE osm_type='N'")
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if osmid is None:
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LOG.fatal("No data found in the database.")
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raise UsageError("No data found in the database.")
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LOG.info("Using node id %d for timestamp lookup", osmid)
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# Get the node from the API to find the timestamp when it was created.
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node_url = 'https://www.openstreetmap.org/api/0.6/node/{}/1'.format(osmid)
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data = get_url(node_url)
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match = re.search(r'timestamp="((\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}))Z"', data)
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if match is None:
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LOG.fatal("The node data downloaded from the API does not contain valid data.\n"
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"URL used: %s", node_url)
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raise UsageError("Bad API data.")
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LOG.debug("Found timestamp %s", match.group(1))
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return dt.datetime.strptime(match.group(1), ISODATE_FORMAT).replace(tzinfo=dt.timezone.utc)
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def set_status(conn, date, seq=None, indexed=True):
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""" Replace the current status with the given status. If date is `None`
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then only sequence and indexed will be updated as given. Otherwise
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the whole status is replaced.
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"""
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assert date is None or date.tzinfo == dt.timezone.utc
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with conn.cursor() as cur:
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if date is None:
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cur.execute("UPDATE import_status set sequence_id = %s, indexed = %s",
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(seq, indexed))
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else:
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cur.execute("TRUNCATE TABLE import_status")
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cur.execute("""INSERT INTO import_status (lastimportdate, sequence_id, indexed)
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VALUES (%s, %s, %s)""", (date, seq, indexed))
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conn.commit()
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def get_status(conn):
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""" Return the current status as a triple of (date, sequence, indexed).
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If status has not been set up yet, a triple of None is returned.
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"""
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with conn.cursor() as cur:
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cur.execute("SELECT * FROM import_status LIMIT 1")
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if cur.rowcount < 1:
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return None, None, None
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row = cur.fetchone()
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return row['lastimportdate'], row['sequence_id'], row['indexed']
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def set_indexed(conn, state):
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""" Set the indexed flag in the status table to the given state.
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"""
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with conn.cursor() as cur:
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cur.execute("UPDATE import_status SET indexed = %s", (state, ))
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conn.commit()
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def log_status(conn, start, event, batchsize=None):
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""" Write a new status line to the `import_osmosis_log` table.
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"""
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with conn.cursor() as cur:
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cur.execute("""INSERT INTO import_osmosis_log
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(batchend, batchseq, batchsize, starttime, endtime, event)
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SELECT lastimportdate, sequence_id, %s, %s, now(), %s FROM import_status""",
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(batchsize, start, event))
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