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e56957f047
Defer database setup until the first call to a function. Needs an additional lock because the setup still needs to be done sequentially.
65 lines
1.8 KiB
Python
65 lines
1.8 KiB
Python
# SPDX-License-Identifier: GPL-2.0-only
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#
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# This file is part of Nominatim. (https://nominatim.org)
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#
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# Copyright (C) 2023 by the Nominatim developer community.
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# For a full list of authors see the git log.
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"""
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Classes and function releated to status call.
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"""
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from typing import Optional, cast
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import datetime as dt
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import sqlalchemy as sa
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from sqlalchemy.ext.asyncio.engine import AsyncConnection
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import asyncpg
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from nominatim import version
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class StatusResult:
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""" Result of a call to the status API.
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"""
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def __init__(self, status: int, msg: str):
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self.status = status
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self.message = msg
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self.software_version = version.NOMINATIM_VERSION
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self.data_updated: Optional[dt.datetime] = None
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self.database_version: Optional[version.NominatimVersion] = None
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async def _get_database_date(conn: AsyncConnection) -> Optional[dt.datetime]:
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""" Query the database date.
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"""
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sql = sa.text('SELECT lastimportdate FROM import_status LIMIT 1')
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result = await conn.execute(sql)
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for row in result:
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return cast(dt.datetime, row[0])
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return None
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async def _get_database_version(conn: AsyncConnection) -> Optional[version.NominatimVersion]:
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sql = sa.text("""SELECT value FROM nominatim_properties
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WHERE property = 'database_version'""")
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result = await conn.execute(sql)
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for row in result:
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return version.parse_version(cast(str, row[0]))
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return None
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async def get_status(conn: AsyncConnection) -> StatusResult:
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""" Execute a status API call.
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"""
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status = StatusResult(0, 'OK')
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try:
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status.data_updated = await _get_database_date(conn)
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status.database_version = await _get_database_version(conn)
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except asyncpg.PostgresError:
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return StatusResult(700, 'Database connection failed')
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return status
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