2 Access and helper functions for the status and status log table.
8 from ..tools.exec_utils import get_url
9 from ..errors import UsageError
11 LOG = logging.getLogger()
13 def compute_database_date(conn):
14 """ Determine the date of the database from the newest object in the
17 # First, find the node with the highest ID in the database
18 with conn.cursor() as cur:
19 osmid = cur.scalar("SELECT max(osm_id) FROM place WHERE osm_type='N'")
22 LOG.fatal("No data found in the database.")
23 raise UsageError("No data found in the database.")
25 LOG.info("Using node id %d for timestamp lookup", osmid)
26 # Get the node from the API to find the timestamp when it was created.
27 node_url = 'https://www.openstreetmap.org/api/0.6/node/{}/1'.format(osmid)
28 data = get_url(node_url)
30 match = re.search(r'timestamp="((\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}))Z"', data)
33 LOG.fatal("The node data downloaded from the API does not contain valid data.\n"
34 "URL used: %s", node_url)
35 raise UsageError("Bad API data.")
37 LOG.debug("Found timestamp %s", match[1])
39 return dt.datetime.fromisoformat(match[1]).replace(tzinfo=dt.timezone.utc)
42 def set_status(conn, date, seq=None, indexed=True):
43 """ Replace the current status with the given status.
45 assert date.tzinfo == dt.timezone.utc
46 with conn.cursor() as cur:
47 cur.execute("TRUNCATE TABLE import_status")
48 cur.execute("""INSERT INTO import_status (lastimportdate, sequence_id, indexed)
49 VALUES (%s, %s, %s)""", (date, seq, indexed))
55 """ Return the current status as a triple of (date, sequence, indexed).
56 If status has not been set up yet, a triple of None is returned.
58 with conn.cursor() as cur:
59 cur.execute("SELECT * FROM import_status LIMIT 1")
61 return None, None, None
64 return row['lastimportdate'], row['sequence_id'], row['indexed']
67 def set_indexed(conn, state):
68 """ Set the indexed flag in the status table to the given state.
70 with conn.cursor() as cur:
71 cur.execute("UPDATE import_status SET indexed = %s", (state, ))
75 def log_status(conn, start, event, batchsize=None):
76 """ Write a new status line to the `import_osmosis_log` table.
78 with conn.cursor() as cur:
79 cur.execute("""INSERT INTO import_osmosis_log
80 (batchend, batchseq, batchsize, starttime, endtime, event)
81 SELECT lastimportdate, sequence_id, %s, %s, now(), %s FROM import_status""",
82 (batchsize, start, event))