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added procedure to update last seen datetime of data source in myems-modbus server

pull/41/head
13621160019@163.com 2021-04-29 11:33:44 +08:00
parent 16734a220b
commit 6f70a27a72
1 changed files with 27 additions and 5 deletions
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32
myems-modbus-tcp/acquisition.py
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@ -65,11 +65,6 @@ def process(logger, data_source_id, host, port):
# sleep several minutes and continue the outer loop to reload points
time.sleep(60)
continue
finally:
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
if rows_point is None or len(rows_point) == 0:
# there is no points for this data source
@ -247,6 +242,21 @@ def process(logger, data_source_id, host, port):
time.sleep(60)
continue
# check the connection to the System Database
if not cnx_system_db.is_connected():
try:
cnx_system_db = mysql.connector.connect(**config.myems_system_db)
cursor_system_db = cnx_system_db.cursor()
except Exception as e:
logger.error("Error in step 4.4 of acquisition process: " + str(e))
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep some seconds
time.sleep(60)
continue
current_datetime_utc = datetime.utcnow()
# bulk insert values into historical database within a period
# update latest values in the meanwhile
@ -413,6 +423,18 @@ def process(logger, data_source_id, host, port):
# ignore this exception
pass
# update data source last seen datetime
update_row = (" UPDATE tbl_data_sources "
" SET last_seen_datetime_utc = '" + current_datetime_utc.isoformat() + "' "
" WHERE id = %s ")
try:
cursor_system_db.execute(update_row, (data_source_id, ))
cnx_system_db.commit()
except Exception as e:
logger.error("Error in step 4.4.4 of acquisition process " + str(e))
# ignore this exception
pass
# sleep some seconds
time.sleep(config.interval_in_seconds)