Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/airflow/utils/orm_event_handlers.py: 47%

1# 

2# Licensed to the Apache Software Foundation (ASF) under one 

3# or more contributor license agreements. See the NOTICE file 

4# distributed with this work for additional information 

5# regarding copyright ownership. The ASF licenses this file 

6# to you under the Apache License, Version 2.0 (the 

7# "License"); you may not use this file except in compliance 

8# with the License. You may obtain a copy of the License at 

9# 

10# http://www.apache.org/licenses/LICENSE-2.0 

11# 

12# Unless required by applicable law or agreed to in writing, 

13# software distributed under the License is distributed on an 

14# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 

15# KIND, either express or implied. See the License for the 

16# specific language governing permissions and limitations 

17# under the License. 

18from __future__ import annotations 

19 

20import logging 

21import os 

22import time 

23import traceback 

24 

25import sqlalchemy.orm.mapper 

26from sqlalchemy import event, exc 

27 

28from airflow.configuration import conf 

29 

30log = logging.getLogger(__name__) 

31 

32 

33def setup_event_handlers(engine): 

34 """Setups event handlers.""" 

35 from airflow.models import import_all_models 

36 

37 event.listen(sqlalchemy.orm.mapper, "before_configured", import_all_models, once=True) 

38 

39 @event.listens_for(engine, "connect") 

40 def connect(dbapi_connection, connection_record): 

41 connection_record.info["pid"] = os.getpid() 

42 

43 if engine.dialect.name == "sqlite": 

44 

45 @event.listens_for(engine, "connect") 

46 def set_sqlite_pragma(dbapi_connection, connection_record): 

47 cursor = dbapi_connection.cursor() 

48 cursor.execute("PRAGMA foreign_keys=ON") 

49 cursor.close() 

50 

51 # this ensures coherence in mysql when storing datetimes (not required for postgres) 

52 if engine.dialect.name == "mysql": 

53 

54 @event.listens_for(engine, "connect") 

55 def set_mysql_timezone(dbapi_connection, connection_record): 

56 cursor = dbapi_connection.cursor() 

57 cursor.execute("SET time_zone = '+00:00'") 

58 cursor.close() 

59 

60 @event.listens_for(engine, "checkout") 

61 def checkout(dbapi_connection, connection_record, connection_proxy): 

62 pid = os.getpid() 

63 if connection_record.info["pid"] != pid: 

64 connection_record.connection = connection_proxy.connection = None 

65 raise exc.DisconnectionError( 

66 f"Connection record belongs to pid {connection_record.info['pid']}, " 

67 f"attempting to check out in pid {pid}" 

68 ) 

69 

70 if conf.getboolean("debug", "sqlalchemy_stats", fallback=False): 

71 

72 @event.listens_for(engine, "before_cursor_execute") 

73 def before_cursor_execute(conn, cursor, statement, parameters, context, executemany): 

74 conn.info.setdefault("query_start_time", []).append(time.perf_counter()) 

75 

76 @event.listens_for(engine, "after_cursor_execute") 

77 def after_cursor_execute(conn, cursor, statement, parameters, context, executemany): 

78 total = time.perf_counter() - conn.info["query_start_time"].pop() 

79 file_name = [ 

80 f"'{f.name}':{f.filename}:{f.lineno}" 

81 for f in traceback.extract_stack() 

82 if "sqlalchemy" not in f.filename 

83 ][-1] 

84 stack = [f for f in traceback.extract_stack() if "sqlalchemy" not in f.filename] 

85 stack_info = ">".join([f"{f.filename.rpartition('/')[-1]}:{f.name}" for f in stack][-3:]) 

86 conn.info.setdefault("query_start_time", []).append(time.monotonic()) 

87 log.info( 

88 "@SQLALCHEMY %s |$ %s |$ %s |$ %s ", 

89 total, 

90 file_name, 

91 stack_info, 

92 statement.replace("\n", " "), 

93 )