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#!/usr/bin/env python3
# Copyright 2018 AT&T Intellectual Property, Inc. 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)
# Read the hb_common table
# Update the state to RECONFIGURATION and save the hb_common table
import os
import sched, datetime, time
import string
import sys
import socket
import yaml
import psycopg2
from pathlib import Path
import os.path as path
hb_properties_file = path.abspath(path.join(__file__, "../config/hbproperties.yaml"))
def postgres_db_open(username,password,host,port,database_name):
envPytest = os.getenv('pytest', "")
if (envPytest == '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):
envPytest = os.getenv('pytest', "")
if (envPytest == '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):
print("HB_Notif::Postgres has already has table -", table_name)
return True
else:
print("HB_Notif::Postgres does not have table - ", table_name)
return False
except (psycopg2.DatabaseError, e):
print('COMMON:Error %s' % e)
finally:
cur.close()
def commit_and_close_db(connection_db):
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
return True
try:
connection_db.commit() # <--- makes sure the change is shown in the database
connection_db.close()
return True
except(psycopg2.DatabaseError, e):
return False
def read_hb_properties():
#Read the hbproperties.yaml for postgress and CBS related data
s=open(hb_properties_file, 'r')
a=yaml.load(s)
if((os.getenv('pg_ipAddress') is None) or (os.getenv('pg_portNum') is None) or (os.getenv('pg_userName') is None) or (os.getenv('pg_passwd') is None)):
ip_address = a['pg_ipAddress']
port_num = a['pg_portNum']
user_name = a['pg_userName']
password = a['pg_passwd']
else:
ip_address = os.getenv('pg_ipAddress')
port_num = os.getenv('pg_portNum')
user_name = os.getenv('pg_userName')
password = os.getenv('pg_passwd')
dbName = a['pg_dbName']
db_name = dbName.lower()
cbs_polling_required = a['CBS_polling_allowed']
cbs_polling_interval = a['CBS_polling_interval']
s.close()
return ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval
def read_hb_common(user_name,password,ip_address,port_num,db_name):
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
hbc_pid = 10
hbc_srcName = "srvc_name"
hbc_time = 1541234567
hbc_state = "RUNNING"
return hbc_pid, hbc_state, hbc_srcName, hbc_time
connection_db = postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
query_value = "SELECT process_id,source_name,last_accessed_time,current_state FROM hb_common;"
cur.execute(query_value)
rows = cur.fetchall()
print("HB_Notif::hb_common contents - ", rows)
hbc_pid = rows[0][0]
hbc_srcName = rows[0][1]
hbc_time = rows[0][2]
hbc_state = rows[0][3]
commit_and_close_db(connection_db)
cur.close()
return hbc_pid, hbc_state, hbc_srcName, hbc_time
def update_hb_common(update_flg, process_id, state, user_name,password,ip_address,port_num,db_name):
current_time = int(round(time.time()))
source_name = socket.gethostname()
source_name = source_name + "-" + str(os.getenv('SERVICE_NAME'))
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
return True
connection_db = postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
query_value = "UPDATE hb_common SET PROCESS_ID='%d',SOURCE_NAME='%s', LAST_ACCESSED_TIME='%d',CURRENT_STATE='%s'" %(process_id, source_name, current_time, state)
cur.execute(query_value)
commit_and_close_db(connection_db)
cur.close()
return True
#if __name__ == "__main__":
def config_notif_run():
ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval = read_hb_properties()
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
return True
connection_db = postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
if(db_table_creation_check(connection_db,"hb_common") == False):
print("HB_Notif::ERROR::hb_common table not exists - No config download")
connection_db.close()
else:
hbc_pid, hbc_state, hbc_srcName, hbc_time = read_hb_common(user_name,password,ip_address,port_num,db_name)
state = "RECONFIGURATION"
update_flg = 1
ret = update_hb_common(update_flg, hbc_pid, state, user_name,password,ip_address,port_num,db_name)
if (ret == True):
print("HB_Notif::hb_common table updated with RECONFIGURATION state")
commit_and_close_db(connection_db)
return True
else:
print("HB_Notif::Failure updating hb_common table")
commit_and_close_db(connection_db)
return False
cur.close()
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