def process_binlog(self):
stream = BinLogStreamReader(connection_settings=self.conn_setting, server_id=self.server_id,
log_file=self.start_file, log_pos=self.start_pos, only_schemas=self.only_schemas,
only_tables=self.only_tables, resume_stream=True)
flag_last_event = False
e_start_pos, last_pos = stream.log_pos, stream.log_pos
# to simplify code, we do not use flock for tmp_file.
tmp_file = create_unique_file('%s.%s' % (self.conn_setting['host'], self.conn_setting['port']))
with temp_open(tmp_file, "w") as f_tmp, self.connection as cursor:
for binlog_event in stream:
if not self.stop_never:
try:
event_time = datetime.datetime.fromtimestamp(binlog_event.timestamp)
except OSError:
event_time = datetime.datetime(1980, 1, 1, 0, 0)
if (stream.log_file == self.end_file and stream.log_pos == self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos == self.eof_pos):
flag_last_event = True
elif event_time < self.start_time:
if not (isinstance(binlog_event, RotateEvent)
or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
continue
elif (stream.log_file not in self.binlogList) or \
(self.end_pos and stream.log_file == self.end_file and stream.log_pos > self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos > self.eof_pos) or \
(event_time >= self.stop_time):
break
# else:
# raise ValueError('unknown binlog file or position')
if isinstance(binlog_event, QueryEvent) and binlog_event.query == 'BEGIN':
e_start_pos = last_pos
if isinstance(binlog_event, QueryEvent) and not self.only_dml:
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event,
flashback=self.flashback, no_pk=self.no_pk)
if sql:
print(sql)
elif is_dml_event(binlog_event) and event_type(binlog_event) in self.sql_type:
for row in binlog_event.rows:
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event, no_pk=self.no_pk,
row=row, flashback=self.flashback, e_start_pos=e_start_pos)
if self.flashback:
f_tmp.write(sql + '\n')
else:
print(sql)
if not (isinstance(binlog_event, RotateEvent) or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
if flag_last_event:
break
stream.close()
f_tmp.close()
if self.flashback:
self.print_rollback_sql(filename=tmp_file)
return True
def process_binlog(self):
stream = BinLogStreamReader(connection_settings=self.conn_setting, server_id=self.server_id,
log_file=self.start_file, log_pos=self.start_pos, only_schemas=self.only_schemas,
only_tables=self.only_tables, resume_stream=True, blocking=True)
# for binlogevent in stream:
# binlogevent.dump()
# return
flag_last_event = False
e_start_pos, last_pos = stream.log_pos, stream.log_pos
# logger.log(f"e_start_pos:{e_start_pos}, last_pos:{last_pos}") #4
# to simplify code, we do not use flock for tmp_file.
tmp_file = create_unique_file('%s.%s' % (self.conn_setting['host'], self.conn_setting['port']))
with temp_open(tmp_file, "w") as f_tmp, self.connection as cursor:
for binlog_event in stream:
# logger.log(f"binlog_event:{binlog_event}")
if not self.stop_never: #Continuously parse binlog. default: stop at the latest event when you start.
# logger.log(f"### not parse binlog continue, binlog_evnet: ###")
# # print(f"binlog_event:{binlog_event}")
# binlog_event
# logger.log(f"### not parse binlog continue, end: ###")
try:
event_time = datetime.datetime.fromtimestamp(binlog_event.timestamp)
except OSError:
event_time = datetime.datetime(1980, 1, 1, 0, 0)
# logger.log(f"event_time:{event_time}, log_pos:{binlog_event.packet.log_pos}, type:{type(binlog_event)}")
# logger.log(f"eof_file:{self.eof_file}")
#if to then event end like 1555
if (stream.log_file == self.end_file and stream.log_pos == self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos == self.eof_pos):
# logger.log(f"flag_last_event = True")
flag_last_event = True
elif event_time < self.start_time: #if current event time befor start time
if not (isinstance(binlog_event, RotateEvent)
or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
continue
elif (stream.log_file not in self.binlogList) or \
(self.end_pos and stream.log_file == self.end_file and stream.log_pos > self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos > self.eof_pos) or \
(event_time >= self.stop_time):
break
# else:
# raise ValueError('unknown binlog file or position')
if isinstance(binlog_event, QueryEvent) and binlog_event.query == 'BEGIN':
# logger.log(f"isinstance(binlog_event, QueryEvent) and binlog_event.query == 'BEGIN', query:{binlog_event.query}")
e_start_pos = last_pos
if isinstance(binlog_event, QueryEvent) and not self.only_dml: #INSERT/UPDATE/DELETE
# logger.log(f"QueryEvent and not self.only_dml, exec concat_sql_from_binlog_event, query:\n{binlog_event.query}")
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event,
flashback=self.flashback, no_pk=self.no_pk)
if sql:
print(f"{sql}")
elif is_dml_event(binlog_event) and event_type(binlog_event) in self.sql_type:
for row in binlog_event.rows:
# logger.log(f"row:{row}")
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event, no_pk=self.no_pk,
row=row, flashback=self.flashback, e_start_pos=e_start_pos)
if self.flashback:
f_tmp.write(sql + '\n')
else:
print(sql)
# print(f"sql:\n{sql}")
if not (isinstance(binlog_event, RotateEvent) or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
if flag_last_event:
break
stream.close()
f_tmp.close()
if self.flashback:
self.print_rollback_sql(filename=tmp_file)
return True