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#!/usr/bin/env python3
# ============LICENSE_START=======================================================
# Copyright (c) 2018-2021 AT&T Intellectual Property. All rights reserved.
# Copyright (c) 2019 Pantheon.tech. All rights reserved.
# Copyright (c) 2020 Deutsche Telekom. All rights reserved.
# Copyright (c) 2021 Fujitsu Ltd.
# ================================================================================
# Licensed 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.
# ============LICENSE_END=========================================================
#
# Author Prakash Hosangady(ph553f@att.com)
# Simple Microservice
# Tracks Heartbeat messages on input topic in DMaaP
# and poppulate the information in postgres DB
import logging
import psycopg2
import requests
import os
import os.path as path
import json
import sys
import time
import misshtbtd as db
import get_logger
_logger = logging.getLogger(__name__)
def read_json_file(i, prefix="../../tests"):
if i == 0:
with open(path.abspath(path.join(__file__, f"{prefix}/test1.json")), "r") as outfile:
cfg = json.load(outfile)
elif i == 1:
with open(path.abspath(path.join(__file__, f"{prefix}/test2.json")), "r") as outfile:
cfg = json.load(outfile)
elif i == 2:
with open(path.abspath(path.join(__file__, f"{prefix}/test3.json")), "r") as outfile:
cfg = json.load(outfile)
return cfg
def process_msg(jsfile, user_name, password, ip_address, port_num, db_name):
global mr_url
i = 0
sleep_duration = 20
while True:
time.sleep(sleep_duration)
with open(jsfile, "r") as outfile:
cfg = json.load(outfile)
mr_url = str(cfg["streams_subscribes"]["ves-heartbeat"]["dmaap_info"]["topic_url"])
while True:
hbc_pid, hbc_state, hbc_srcName, hbc_time = db.read_hb_common(
user_name, password, ip_address, port_num, db_name
)
if hbc_state == "RECONFIGURATION":
_logger.info("HBT:Waiting for hb_common state to become RUNNING")
time.sleep(10)
else:
break
if os.getenv("pytest", "") == "test":
eventnameList = ["Heartbeat_vDNS", "Heartbeat_vFW", "Heartbeat_xx"]
connection_db = 0
else:
connection_db = postgres_db_open(user_name, password, ip_address, port_num, db_name)
cur = connection_db.cursor()
cur.execute("SELECT event_name FROM vnf_table_1")
eventnameList = [item[0] for item in cur.fetchall()]
msg = "\n\nHBT:eventnameList values ", eventnameList
_logger.info(msg)
if "groupID" not in os.environ or "consumerID" not in os.environ:
get_url = mr_url + "/DefaultGroup/1?timeout=15000"
else:
get_url = mr_url + "/" + os.getenv("groupID", "") + "/" + os.getenv("consumerID", "") + "?timeout=15000"
msg = "HBT:Getting :" + get_url
_logger.info(msg)
if os.getenv("pytest", "") == "test":
jsonobj = read_json_file(i)
jobj = []
jobj.append(jsonobj)
i = i + 1
msg = "HBT:newly received test message", jobj
_logger.info(msg)
if i >= 3:
i = 0
break
else:
res = requests.get(get_url)
msg = "HBT:", res.text
_logger.info(msg)
inputString = res.text
# If mrstatus in message body indicates some information, not json msg.
if "mrstatus" in inputString:
continue
jlist = inputString.split("\n")
# Process the DMaaP input message retreived
error = False
for line in jlist:
try:
jobj = json.loads(line)
except ValueError:
msg = "HBT:Decoding JSON has failed"
_logger.error(msg)
error = True
break
if error:
continue
if len(jobj) == 0:
continue
for item in jobj:
try:
if os.getenv("pytest", "") == "test":
jitem = jsonobj
else:
jitem = json.loads(item)
srcname = jitem["event"]["commonEventHeader"]["sourceName"]
lastepo = jitem["event"]["commonEventHeader"]["lastEpochMicrosec"]
# if lastEpochMicrosec looks like microsec, align it with millisec
if lastepo > 1000000000000000:
lastepo = int(lastepo / 1000)
seqnum = jitem["event"]["commonEventHeader"]["sequence"]
eventName = jitem["event"]["commonEventHeader"]["eventName"]
except Exception as err:
msg = "HBT message process error - ", err
_logger.error(msg)
continue
msg = "HBT:Newly received HB event values ::", eventName, lastepo, srcname
_logger.info(msg)
if db_table_creation_check(connection_db, "vnf_table_2") is False:
msg = "HBT:Creating vnf_table_2"
_logger.info(msg)
cur.execute(
"""
CREATE TABLE vnf_table_2 (
EVENT_NAME varchar,
SOURCE_NAME_KEY integer,
PRIMARY KEY(EVENT_NAME, SOURCE_NAME_KEY),
LAST_EPO_TIME BIGINT,
SOURCE_NAME varchar,
CL_FLAG integer
)"""
)
else:
msg = "HBT:vnf_table_2 is already there"
_logger.info(msg)
if eventName in eventnameList: # pragma: no cover
if os.getenv("pytest", "") == "test":
break
cur.execute("SELECT source_name_count FROM vnf_table_1 WHERE event_name = %s", (eventName,))
row = cur.fetchone()
source_name_count = row[0]
source_name_key = source_name_count + 1
cl_flag = 0
if source_name_count == 0: # pragma: no cover
_logger.info("HBT: Insert entry into vnf_table_2, source_name='%s'", srcname)
cur.execute(
"INSERT INTO vnf_table_2 VALUES(%s,%s,%s,%s,%s)",
(eventName, source_name_key, lastepo, srcname, cl_flag),
)
cur.execute(
"UPDATE vnf_table_1 SET SOURCE_NAME_COUNT = %s where EVENT_NAME = %s",
(source_name_key, eventName),
)
else: # pragma: no cover
msg = "HBT:event name, source_name & source_name_count are", eventName, srcname, source_name_count
_logger.info(msg)
for source_name_key in range(source_name_count):
cur.execute(
"SELECT source_name FROM vnf_table_2 WHERE event_name = %s AND " "source_name_key = %s",
(eventName, (source_name_key + 1)),
)
row = cur.fetchall()
if len(row) == 0:
continue
db_srcname = row[0][0]
if db_srcname == srcname:
msg = "HBT: Update vnf_table_2 : ", source_name_key, row
_logger.info(msg)
cur.execute(
"UPDATE vnf_table_2 SET LAST_EPO_TIME = %s, SOURCE_NAME = %s "
"WHERE EVENT_NAME = %s AND SOURCE_NAME_KEY = %s",
(lastepo, srcname, eventName, (source_name_key + 1)),
)
source_name_key = source_name_count
break
else:
continue
msg = "HBT: The source_name_key and source_name_count are ", source_name_key, source_name_count
_logger.info(msg)
if source_name_count == (source_name_key + 1):
source_name_key = source_name_count + 1
_logger.info("HBT: Insert entry into vnf_table_2, source_name='%s'", srcname)
cur.execute(
"INSERT INTO vnf_table_2 VALUES(%s,%s,%s,%s,%s)",
(eventName, source_name_key, lastepo, srcname, cl_flag),
)
cur.execute(
"UPDATE vnf_table_1 SET SOURCE_NAME_COUNT = %s WHERE EVENT_NAME = %s",
(source_name_key, eventName),
)
else:
_logger.info("HBT:eventName is not being monitored, Igonoring JSON message")
commit_db(connection_db)
commit_and_close_db(connection_db)
if os.getenv("pytest", "") != "test":
cur.close()
def postgres_db_open(username, password, host, port, database_name):
if os.getenv("pytest", "") == "test":
return True
connection = psycopg2.connect(database=database_name, user=username, password=password, host=host, port=port)
return connection
def db_table_creation_check(connection_db, table_name):
if os.getenv("pytest", "") == "test":
return True
try:
cur = connection_db.cursor()
cur.execute("SELECT * FROM information_schema.tables WHERE table_name = %s", (table_name,))
database_names = cur.fetchone()
if database_names is not None:
if table_name in database_names:
return True
else:
return False
except psycopg2.DatabaseError as e:
msg = "COMMON:Error %s" % e
_logger.error(msg)
finally:
cur.close()
def commit_db(connection_db):
if os.getenv("pytest", "") == "test":
return True
try:
connection_db.commit() # <--- makes sure the change is shown in the database
return True
except psycopg2.DatabaseError as e:
msg = "COMMON:Error %s" % e
_logger.error(msg)
return False
def commit_and_close_db(connection_db):
if os.getenv("pytest", "") == "test":
return True
try:
connection_db.commit() # <--- makes sure the change is shown in the database
connection_db.close()
return True
except psycopg2.DatabaseError as e:
msg = "COMMON:Error %s" % e
_logger.error(msg)
return False
if __name__ == "__main__":
get_logger.configure_logger("htbtworker")
jsfile = sys.argv[1]
msg = "HBT:HeartBeat thread Created"
_logger.info("HBT:HeartBeat thread Created")
msg = "HBT:The config file name passed is -%s", jsfile
_logger.info(msg)
(
ip_address,
port_num,
user_name,
password,
db_name,
cbs_polling_required,
cbs_polling_interval,
) = db.read_hb_properties(jsfile)
process_msg(jsfile, user_name, password, ip_address, port_num, db_name)
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