| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| import logging |
| import os |
| import time |
| import traceback |
| |
| from sqlalchemy import event, exc |
| |
| from airflow.configuration import conf |
| |
| log = logging.getLogger(__name__) |
| |
| |
| def setup_event_handlers(engine): |
| """Setups event handlers.""" |
| |
| @event.listens_for(engine, "connect") |
| def connect(dbapi_connection, connection_record): |
| connection_record.info['pid'] = os.getpid() |
| |
| if engine.dialect.name == "sqlite": |
| |
| @event.listens_for(engine, "connect") |
| def set_sqlite_pragma(dbapi_connection, connection_record): |
| cursor = dbapi_connection.cursor() |
| cursor.execute("PRAGMA foreign_keys=ON") |
| cursor.close() |
| |
| # this ensures sanity in mysql when storing datetimes (not required for postgres) |
| if engine.dialect.name == "mysql": |
| |
| @event.listens_for(engine, "connect") |
| def set_mysql_timezone(dbapi_connection, connection_record): |
| cursor = dbapi_connection.cursor() |
| cursor.execute("SET time_zone = '+00:00'") |
| cursor.close() |
| |
| @event.listens_for(engine, "checkout") |
| def checkout(dbapi_connection, connection_record, connection_proxy): |
| pid = os.getpid() |
| if connection_record.info['pid'] != pid: |
| connection_record.connection = connection_proxy.connection = None |
| raise exc.DisconnectionError( |
| "Connection record belongs to pid {}, " |
| "attempting to check out in pid {}".format(connection_record.info['pid'], pid) |
| ) |
| |
| if conf.getboolean('debug', 'sqlalchemy_stats', fallback=False): |
| |
| @event.listens_for(engine, "before_cursor_execute") |
| def before_cursor_execute(conn, cursor, statement, parameters, context, executemany): |
| conn.info.setdefault('query_start_time', []).append(time.perf_counter()) |
| |
| @event.listens_for(engine, "after_cursor_execute") |
| def after_cursor_execute(conn, cursor, statement, parameters, context, executemany): |
| total = time.perf_counter() - conn.info['query_start_time'].pop() |
| file_name = [ |
| f"'{f.name}':{f.filename}:{f.lineno}" |
| for f in traceback.extract_stack() |
| if 'sqlalchemy' not in f.filename |
| ][-1] |
| stack = [f for f in traceback.extract_stack() if 'sqlalchemy' not in f.filename] |
| stack_info = ">".join([f"{f.filename.rpartition('/')[-1]}:{f.name}" for f in stack][-3:]) |
| conn.info.setdefault('query_start_time', []).append(time.monotonic()) |
| log.info( |
| "@SQLALCHEMY %s |$ %s |$ %s |$ %s ", |
| total, |
| file_name, |
| stack_info, |
| statement.replace("\n", " "), |
| ) |