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#!/usr/bin/env python3
# Copyright 2018-2020 AT&T Intellectual Property, Inc. All rights reserved.
# Copyright (c) 2019 Pantheon.tech. All rights reserved.
#
# 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.
#
# Author Prakash Hosangady(ph553f@att.com)
# Simple Microservice
# Tracks Heartbeat messages on input topic in DMaaP
# and poppulate the information in postgres DB
import psycopg2
import requests
import os
import os.path as path
import json,sys,time
import logging
from . import misshtbtd as db
from . import get_logger
_logger = get_logger.get_logger(__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()
db_query = "Select event_name from vnf_table_1"
cur.execute(db_query)
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 == True):
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'])
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") ==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
db_query = "Select source_name_count from vnf_table_1 where event_name='%s'" %(eventName)
msg="HBT:",db_query
_logger.info(msg)
if(os.getenv('pytest', "") == 'test'):
break
cur.execute(db_query)
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
msg="HBT: Insert entry in table_2,source_name_count=0 : ",row
_logger.info(msg)
query_value = "INSERT INTO vnf_table_2 VALUES('%s',%d,%d,'%s',%d);" %(eventName,source_name_key,lastepo,srcname,cl_flag)
cur.execute(query_value)
update_query = "UPDATE vnf_table_1 SET SOURCE_NAME_COUNT='%d' where EVENT_NAME ='%s'" %(source_name_key,eventName)
cur.execute(update_query)
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):
epoc_query = "Select source_name from vnf_table_2 where event_name= '%s' and source_name_key=%d" %(eventName,(source_name_key+1))
msg="HBT:eppc query is",epoc_query
_logger.info(msg)
cur.execute(epoc_query)
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)
update_query = "UPDATE vnf_table_2 SET LAST_EPO_TIME='%d',SOURCE_NAME='%s' where EVENT_NAME='%s' and SOURCE_NAME_KEY=%d" %(lastepo,srcname,eventName,(source_name_key+1))
cur.execute(update_query)
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
msg="HBT: Insert entry in table_2 : ",row
_logger.info(msg)
insert_query = "INSERT INTO vnf_table_2 VALUES('%s',%d,%d,'%s',%d);" %(eventName,source_name_key,lastepo,srcname,cl_flag)
cur.execute(insert_query)
update_query = "UPDATE vnf_table_1 SET SOURCE_NAME_COUNT='%d' where EVENT_NAME ='%s'" %(source_name_key,eventName)
cur.execute(update_query)
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()
query_db = "select * from information_schema.tables where table_name='%s'" %(table_name)
cur.execute(query_db)
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__':
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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